"Code Talker: The First and Only Memoir by One of the Original Navajo Code Talkers of WWII" is a book written by Chester Nez in collaboration with Judith Schiess Avila. It is an autobiography of the author and his experiences in World War II as a Navajo code talker.
The Navajo Code Talkers were an elite group of Navajo Marines who used their language to develop a code that could not be deciphered by the enemy. The Japanese had broken all American codes, so the Marines wanted to create an unbreakable code. The Navajo language, which had no written form, was the perfect solution. Navajo Code Talkers developed an intricate code that used their language's complex syntax, tonal qualities, and dialects. It proved to be the only code that the Japanese couldn't break.
The Navajo Code Talkers took part in every major Marine operation in the Pacific, from Guadalcanal to Okinawa. Chester Nez, the book's author, was one of the original Navajo Code Talkers. He was born in New Mexico in 1921 and was educated in a boarding school where he was forbidden from speaking his native Navajo language. Chester Nez was a U.S. Marine who was recruited in 1942 and became a part of the Navajo Code Talkers program. He was a member of the 382nd Platoon and served in the Pacific, where he worked as a radio operator.
Code Talker is about the Navajo Code Talkers, the Marine unit that used the Navajo language to develop an unbreakable code that played a crucial role in the U.S. victory over Japan in World War II. The book offers a first-hand account of what it was like to be a Navajo Code Talker during the war, as well as the impact that the code talkers had on the outcome of the war. Chester Nez provides an in-depth look at Navajo culture and history while telling his own personal story of growing up on the Navajo reservation and joining the Marine Corps.
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a planet orbiting a star feels a force of gravity from the star. if you could move the planet closer to the star so its distance was half the original distance from the star, the force of gravity would be ...
If you move a planet closer to the star so that its distance from the star is half the original distance from the star, the force of gravity would be four times stronger than before.What is gravity?Gravity is a force of attraction between any two objects that have mass.
The gravitational force is what keeps the planets in orbit around the Sun. When two objects have a larger mass, they attract each other with greater force. When the distance between two objects is decreased, the gravitational force between them increases.
Gravity is dependent on mass. The more massive an object is, the greater its gravity will be. The closer two objects are, the more powerful the gravitational force between them. According to the Law of Universal Gravitation, any two bodies in the universe attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
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The Singapore Flyer is one of the largest Ferris wheels in the world standing at 165 meters tall. The Flyer boards at the bottom
of its rotation from a platform 15 meters from the ground. Each capsuletakes 30 minutes to complete one full rotation. i. (0 points) Draw and label a diagram of the Singapore Flyer.
ii. (3 points) How many rotations does each capsule make in 1 hour? ________ 2 hours? ________ t hours? _______
How many radians does each capsule sweep in 1 hour? ________ 2 hours? ________ t hours? _______
iii. (3 points) Write an equation for H, the height of a capsule in meters, as a func- tion of t, the time in hours since the capsule boarded.
The result is added to the initial height of 15 meters to obtain the height of the capsule at any given time.
To determine the number of rotations each capsule makes in a given time, we need to convert the time to minutes and divide by the time it takes for one full rotation.
In 1 hour (60 minutes), each capsule will make 60 minutes / 30 minutes = 2 rotations.
In 2 hours (120 minutes), each capsule will make 120 minutes / 30 minutes = 4 rotations.
In t hours (t × 60 minutes), each capsule will make (t × 60 minutes) / 30 minutes = (2×t) rotations.
To calculate the number of radians each capsule sweeps in a given time, we need to multiply the number of rotations by 2π (since one full rotation is equal to 2π radians).
In 1 hour, each capsule will sweep 2 rotations × 2×π radians = 4π radians.
In 2 hours, each capsule will sweep 4 rotations × 2×π radians = 8π radians.
In t hours, each capsule will sweep (2×t) rotations × 2×π radians = 4tπ radians.
The height of a capsule can be determined using the following equation:
H_(t) = 15 meters + (t × 30 minutes × (165 meters - 15 meters) / (60 minutes))
In this equation, t represents the time in hours since the capsule boarded. The term (t × 30 minutes) converts the time to minutes, and the division by (60 minutes) converts it back to hours. The expression (165 meters - 15 meters) represents the total vertical distance the capsule can travel, and it is multiplied by the ratio of the elapsed time to the total time for one full rotation. The result is added to the initial height of 15 meters to obtain the height of the capsule at any given time.
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b) A man 1.65 m tall is 18 metres away from a tower 25
m high. What is the angle of elevation of the top of the tower from
his eyes?
The height of the tower is 22.50 m.
The height of the tower if a man 1.65 m tall is 18 meters away from a tower 25 m high and the angle of elevation fromThe problem is related to trigonometry which is the branch of mathematics concerned with the relationships between the sides and angles of triangles. Here, we are to determine the height of the tower if a man 1.65 m tall is 18 metres away from a tower 25 m high and the angle of elevation from his eyes. We can solve the problem by using the tan function.tanθ = perpendicular/basewhere θ is the angle of elevation and the base is 18 m. Let h be the height of the tower. Then,tanθ = h/25-1.65h = (25-1.65)tanθ ≈ 22.50 thus, the height of the tower is approximately 22.50 m. Therefore, the height of the tower is 22.50 m.
The separation from the base to the highest point of a person or thing standing upstanding. estimating a tree's height. an average-sized six feet in level. : the amount of height above the ground.
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"Diffuse reflection occurs when the size of surface irregularities is
A) small compared to the wavelength of the light used.
B) large compared to the wavelength of the light used.
C) microscopic."
Diffuse reflection occurs when the size of surface irregularities is small compared to the wavelength of the light used. Diffuse reflection occurs when the light rays strike a rough surface and get scattered in many directions.
The surface irregularities are small compared to the wavelength of the light used.Diffuse reflection is defined as the reflection of light from a rough surface that is not in an orderly or uniform manner. The rays of light coming from a single source will be scattered and reflected in different directions because of surface irregularities.This phenomenon is the opposite of specular reflection. In the case of specular reflection, the angle of incidence is equal to the angle of reflection. But in diffuse reflection, there is no definite angle of reflection.Diffuse reflection is when light bounces off an uneven surface, and it scatters in different directions. The rough surface causes the light to scatter. In contrast, specular reflection is when light bounces off a smooth surface, and it bounces in one direction, like a mirror.The angle of incidence is equal to the angle of reflection in the case of specular reflection.
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which observations finally lead to the hypothesis that an asteroid had hit the earth at the kt boundary?
In the late 1970s, scientists discovered that iridium, an element rare in the Earth's crust but abundant in asteroids, was present in sediments dating back to the end of the Cretaceous period, which was the same period as the K-T boundary. This led to the development of the theory that a large asteroid hit the earth at the kt boundary. The iridium anomaly, which is a layer rich in iridium at the K-T boundary, is one of the most important clues.
This layer of clay and rock has a high concentration of iridium, a rare element in the Earth's crust, but common in meteorites. The K-T boundary is a geological layer that represents the transition from the Mesozoic Era to the Cenozoic Era. This boundary has an extraordinary amount of iridium in it, indicating that an asteroid or comet struck the Earth at the time.
This impact is believed to have caused the extinction of the dinosaurs, as well as many other species of life on Earth. Thus, the presence of the iridium layer is the final observation that led to the hypothesis that an asteroid had hit the Earth at the K-T boundary.
The presence of an iridium layer at the K-T boundary is the final observation that led to the hypothesis that an asteroid had hit the Earth. The K-T boundary is a geological layer that represents the transition from the Mesozoic Era to the Cenozoic Era. It has a high concentration of iridium, a rare element in the Earth's crust, but common in meteorites.
This layer of clay and rock has a high concentration of iridium, a rare element in the Earth's crust, but common in meteorites.
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mary has a mass of 40 kg and sprints at 1m/s. how much kinetic energy does she have?
Explanation:
What is represented by price R10 In graph A
Mary's kinetic energy can be calculated using the formula: [tex]\( KE = \frac{1}{2}mv^2 \)[/tex], where KE is the kinetic energy, m is the mass, and v is the velocity. Given that Mary has a mass of 40 kg and sprints at 1 m/s, we can substitute these values into the formula to find her kinetic energy.
In the first paragraph, the summary of the answer:
Mary's kinetic energy can be calculated using the formula [tex]\( KE = \frac{1}{2}mv^2 \)[/tex]. Given her mass of 40 kg and sprinting velocity of 1 m/s, we can find her kinetic energy.
Now, let's proceed to explain the answer in more detail.
The formula for kinetic energy is [tex]\( KE = \frac{1}{2}mv^2 \)[/tex], where KE represents the kinetic energy, m is the mass, and v is the velocity. Plugging in Mary's mass of 40 kg and her sprinting velocity of 1 m/s into the formula, we get:
[tex]\[ KE = \frac{1}{2} \times 40 \, \text{kg} \times (1 \, \text{m/s})^2 \][/tex]
Simplifying the equation, we have:
[tex]\[ KE = \frac{1}{2} \times 40 \, \text{kg} \times 1 \, \text{m}^2/\text{s}^2 \\\\\[ KE = 20 \, \text{kg} \cdot \text{m}^2/\text{s}^2 \][/tex]
The unit for kinetic energy is joules (J), which is equivalent to [tex]\( \text{kg} \cdot \text{m}^2/\text{s}^2 \)[/tex]. Therefore, Mary has a kinetic energy of 20 joules.
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An astronaut holds a rock 100 m above the surface of Planet X. The rock is then thrown upward with a speed of 15 m/s, as shown in the figure. The rock reaches the ground 10 s after it is thrown. The atmosphere of Planet X has a negligible effect on the rock when it is in free fall.
Astronaut holds a rock 100 m above the surface of Planet X. The acceleration due to gravity on Planet X is 1.5 m/s².
Given information: Astronaut holds a rock 100 m above the surface of Planet X.The rock is thrown upward with a speed of 15 m/s.The rock reaches the ground 10 s after it is thrown.
The atmosphere of Planet X has a negligible effect on the rock when it is in free fall.
To find: acceleration due to gravitySolution: When the rock is thrown upward, its initial velocity, u = +15 m/s (upward velocity is taken as positive)The final velocity, v = 0 (at the maximum height, the velocity becomes zero). The distance traveled by the rock, s = 100 m. Total time taken by the rock to return to the ground, t = 10 s
Using the kinematic equation,v = u + gtv = u + gt0 = +15 - g x 10 where g is the acceleration due to gravityg = 15/10= 1.5 m/s²Therefore, the acceleration due to gravity on Planet X is 1.5 m/s².
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what lens aperture setting will offer the most amount of light in a dark setting?
When shooting in a dark setting, you may need to use a wider aperture, slower shutter speed, higher ISO, or a combination of all three to get a well-exposed image.
To get the most amount of light in a dark setting, you should use the widest lens aperture setting available. A wide aperture allows more light to enter the camera and reach the image sensor, which makes it ideal for low-light situations.
The lens aperture is a small opening located inside the camera lens that controls the amount of light that enters the camera. It is measured in f-stops and is often represented using a sequence of numbers, such as f/2.8, f/4, f/5.6, f/8, and so on. The smaller the f-stop number, the wider the aperture, and the larger the amount of light that is allowed in. So, to get the most amount of light, you should use the smallest f-stop number available.
A dark setting refers to a situation where there is not enough light for the camera to capture a well-exposed image. This can happen in a variety of situations, such as indoors with low lighting or outside at night. When shooting in a dark setting, you may need to use a wider aperture, slower shutter speed, higher ISO, or a combination of all three to get a well-exposed image.
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A binary star system consists of two stars very close to one another. The apparent magnitudes of m1 = 2 and m2 = 3. The apparent magnitude m is defined by a star's flux density, compared to the reference star with m0 and f0
m_m0=_2. 5(f/f0)
The ratio of the flux density of star 2 to the flux density of the reference star (f2/f₀) is approximately 0.59. The formula for calculating the magnitude of a star is given as: [tex]m_m₀=_2.5(f/f₀)[/tex]
A binary star system refers to two stars that are very close to each other. The apparent magnitudes of m₁ = 2 and m₂ = 3. The apparent magnitude m is defined by a star's flux density, compared to the reference star with m₀ and f₀. The formula for calculating the magnitude of a star is given as:
[tex]m_m₀=_2.5(f/f0)[/tex]
Where m is the apparent magnitude, m₀ is the reference star's apparent magnitude, f is the flux density of the star, and f₀ is the flux density of the reference star.
Applying the formula for m₁ : 2 - m₀
= 2.5 log (f/f₀)
Applying the formula for m₂: 3 - m₀
= 2.5 log (f/f₀)
We can eliminate m₀ by subtracting the two equations:
2 - 3 = 2.5 log (f/f₀) - 2.5 log (f/f₀)log (f/f₀)
= (2-3)/2.5= -0.4f/f₀
= [tex]10^(-0.4)[/tex]
We know that
f1/f₂ = m₂/m₁
f₂ = f₁ (m₂/m₁)
Substituting f/f₀ = [tex]10^(-0.4)[/tex] and m₁ = 2 and m₂ = 3
f₂/f₀= f₁/f₀ * m/m₁
=[tex]10^(-0.4)[/tex] * 3/2
= 0.59
Therefore, the ratio of the flux density of star 2 to the flux density of the reference star (f2/f₀) is approximately 0.59.
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Assuming that energy is quantized in integer intervals as seen in the 3 particles with a total energy of 3 example from the micrsostates video, which of the following combinations will have the most possible microstates?
1 particle with a total energy of 1
3 particles with a total energy of 3
1 particle with a total energy of 6
3 particles with a total energy of 6
Among the given options, the combination with 3 particles and a total energy of 6 (Option D) will have the most possible microstates.
In this scenario, the energy is quantized in integer intervals, and each particle can have energy values of 0, 1, 2, or 3. We need to find the combination that allows for the highest number of microstates, which corresponds to the highest number of possible energy distributions among the particles.
Option D, with three particles and a total energy of six, provides the most flexibility in energy distribution. The particles can have various energy combinations, such as (2, 2, 2), (1, 2, 3), (0, 3, 3), and so on. Each energy value represents a different microstate, and the total number of microstates is determined by the number of distinct energy distributions.
On the other hand, the other options have either fewer particles or a lower total energy, which limits the number of possible energy distributions and, consequently, the number of microstates.
Therefore, Option D, with three particles and a total energy of six, will have the most possible microstates.
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The complete question is
Assuming that energy is quantized in integer intervals as seen in the 3 particles with a total energy of 3 example from the micrsostates video, which of the following combinations will have the most possible microstates?
A. 1 particle with a total energy of 1
B. 3 particles with a total energy of 3
C. 1 particle with a total energy of 6
D. 3 particles with a total energy of 6
37. A woman wants to construct a box whose base length is twice the base width. The material to build the top and bottom is $9/m² and the material to build the sides is $6/m². If the woman wants the
The base length of the box is twice the base width and the woman wants the surface area to be 54 m². The dimensions of the base of the box are 6 m × 3 m. The cost of material to build the top and bottom is $9/m², while the material to build the sides is $6/m². The total cost of the materials to build the box is $324.
The surface area of the box is given by S = 2lw + 2lh + 2wh where l is the length, w is the width and h is the height of the box. It is given that l = 2w, h = w and S = 54. Substituting these values in the surface area equation, we get 2(2w)w + 2(2w)w + 2w² = 54. Simplifying this equation, we get w = 3. Therefore, the dimensions of the base of the box are 6 m × 3 m.
The cost of material to build the top and bottom of the box is $9/m², while the material to build the sides is $6/m². The surface area of the top and bottom is 2lw = 2(2w)(w) = 4w², which is equal to 36 m². Therefore, the cost of material for the top and bottom is $9/m² × 36 m² = $324. The surface area of the four sides is 2lh + 2wh = 2(w)(2w) + 2(3)(2w) = 16w, which is equal to 48 m². Therefore, the cost of material for the sides is $6/m² × 48 m² = $288. The total cost of the materials to build the box is $324 + $288 = $612.
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a) A wall consists of wood with a thickness of 2.0 cm. Wood has thermal conductivity λ1 = 0.14W / Km. Calculate the U-value. How much power watts disappears from such a wall with an area of 20m
A wall consists of wood with a thickness of 2.0 cm. Wood has thermal conductivity λ1 = 0.14W / Km.The U-value of the wall is 7 W/(Km^2).1400 watts of power would disappear from the wall with an area of 20 m² and a temperature difference of 10°C.
To calculate the U-value of the wall, we need to use the formula:
U-value = 1 / (total thermal resistance)
The total thermal resistance can be calculated as the sum of the thermal resistances of each layer of the wall.
In this case, we have a single layer of wood with a thickness of 2.0 cm and a thermal conductivity of λ1 = 0.14 W/Km.
The thermal resistance (R-value) of a material can be calculated using the formula:
R-value = thickness / thermal conductivity
Given values:
Thickness of wood (t) = 2.0 cm = 0.02 m
Thermal conductivity of wood (λ1) = 0.14 W/Km
Calculating the R-value for the wood layer:
R-value = 0.02 m / 0.14 W/Km
Now, we can calculate the U-value:
U-value = 1 / (R-value)
Calculating the U-value:
U-value = 1 / (0.02 m / 0.14 W/Km)
U-value = 0.14 W/Km / 0.02 m
U-value = 7 W/(Km^2)
The U-value represents the thermal transmittance of the wall, and a lower value indicates better insulation properties. In this case, the U-value of the wall is 7 W/(Km^2).
To calculate the amount of power (in watts) that disappears from such a wall with an area of 20 m², we can use the formula:
Power = U-value * Area * Temperature difference
Given values:
Area (A) = 20 m²
Temperature difference (ΔT) = Assumed value (e.g., the difference between indoor and outdoor temperatures)
Let's assume a temperature difference of 10°C.
Calculating the power:
Power = 7 W/(Km^2) * 20 m² * 10 K
Power = 1400 W
Therefore, 1400 watts of power would disappear from the wall with an area of 20 m² and a temperature difference of 10°C.
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Analyze,how does the inertia of the weights change by increasing their distance to the center - R! Which statement corresponds to Your results? o Inertia is rarely increasing along with R, in less than half of Rmeasurements o Inertia is often increasing along with R, in 50-80% of R measurements o Inertia is mostly, but not always increasing along with R, in at least 80% of R measurements o Inertia is always decreasing with increasing R o Inertia is always increasing along with R
The inertia of an object is its resistance to change in its state of motion. It is measured by the moment of inertia, which is equal to the mass of the object multiplied by the square of its radius. As the radius of an object increases, its moment of inertia increases, and its inertia decreases.So option 4 is correct.
In the case of the weights, as the distance from the center (R) increases, the moment of inertia increases, and the inertia decreases. This means that it takes less force to accelerate the weights as they move away from the center.
The other options are incorrect.
Option (1) is incorrect because inertia is always increasing with increasing R.
Option (2) is incorrect because inertia is never increasing along with R.
Option (3) is incorrect because inertia is not mostly increasing along with R.
Option (5) is incorrect because inertia is not always increasing along with R.
Therefore option 4 is correct.
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A solid sphere (I = 2/5 MR^2) of mass 0.44 kg and radius 0.022 m rolls, without slipping, down an incline of height 0.98 m. What is the speed of the sphere at the bottom of the incline?
A solid sphere (I = 2/5 MR^2) of mass 0.44 kg and radius 0.022 m rolls, without slipping, down an incline of height 0.98 m.
To calculate the speed of the sphere at the bottom of the incline, we have to use conservation of energy law.
Conservation of energy states that the total energy of an isolated system remains constant. In other words, energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.
Let's calculate potential energy (PE) and kinetic energy (KE) in this question using the given formulae.
PE = mgh (mass x gravity x height)
where; m = mass = 0.44 kg
g = gravity = 9.8 m/s^2
h = height = 0.98 m
PE = 0.44 x 9.8 x 0.98
PE = 4.2832 J
KE = 0.5mv^2 (0.5 x mass x velocity^2)
where; m = mass = 0.44 kg
v = velocity
KE = 0.5 x 0.44 x v^2
KE = 0.22v^2
Now, applying the law of conservation of energy, we get:
Initial energy (at the top) = Final energy (at the bottom)PE(top) + KE(top)
= PE(bottom) + KE(bottom)0 + 0.5mv^2
= mgh + 0KE(bottom)
= mgh + 0.5mv^2v
= sqrt(2gh/5)
Where, h = height of incline = 0.98 m.
Therefore,
v = sqrt(2gh/5)
v = sqrt(2 × 9.8 × 0.98 / 5)v
= 1.80 m/s
Therefore, the speed of the sphere at the bottom of the incline is 1.80 m/s.
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a fireman of mass 80 kgkg slides down a pole. for the steps and strategies involved in solving a similar problem, you may view a_____.
To understand the steps and strategies involved in solving a similar problem of a fireman sliding down a pole, you can refer to a reliable resource or guide.
When dealing with a problem similar to a fireman sliding down a pole, it is helpful to have a reference or guide that outlines the necessary steps and strategies. While there are various resources available, it is important to choose a reliable one to ensure accuracy and plagiarism-free information. One option is to consult textbooks or online tutorials on physics or mechanics, specifically those that cover topics related to forces, friction, and motion.
These resources often provide detailed explanations, equations, and examples to help solve similar problems effectively. Additionally, reputable educational websites or academic publications can be valuable sources for step-by-step instructions and strategies.
By accessing such resources, you can gain a better understanding of the principles involved and apply them to solve problems involving sliding or descending objects.
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cientists establish that a river had been depositing sediment for 2.0 x 10 years. They determine that the sedimentary rock strata is 9.0 km thick. The rate of sedimentary deposit is A. 0.45 cm/a B. 4.5 cm/a C. 9.0 cm/a D. 45 cm/a
Sedimentary rock is one of the three main types of rock found on Earth's crust, along with igneous and metamorphic rocks. It is formed through the accumulation, compaction, and cementation of sediments over time.
The thickness of the sedimentary rock strata = 9.0 km. The time period for which the river had been depositing sediment = 2.0 × 10 years. We need to find the rate of sedimentary deposit. Rate = (Thickness of the sedimentary rock strata) ÷ (Time period for which the river had been depositing sediment).Here, the thickness of the sedimentary rock strata = 9.0 km= 9000 m. Time period for which the river had been depositing sediment = 2.0 × 10 years = 2.0 × 10 × 365.25 days (in a year) = 7.305 × 10⁴ days.
Rate = (9000 m) ÷ (7.305 × 10⁴ days) = 0.12315 m/day = 12.315 cm/day.
Approximating the answer to one significant figure, the rate of sedimentary deposit is 10 cm/day. Hence, the correct option is option D: 45 cm/a.
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Tania’s infant daughter has colic and cries during the night. The noise level in the house at these times is 75 dB. When the baby finally falls asleep, the noise level is 35 dB. How many times more intense if the noise level in the house when the baby is crying?
The noise level in the house when the baby is crying is about 4.59 times more intense than when the baby is finally asleep.
the intensity of sound can be determined by the ratio of the square of the sound pressure level (SPL) of a sound to the square of a reference sound pressure level. It is expressed in decibels (dB).
The equation that represents the intensity of sound is:
I₁/I₂ = (SPL₁/SPL₂)²
I₁ is the intensity of sound 1, SPL₁ is the sound pressure level 1I₂ is the intensity of sound 2, SPL₂ is the sound pressure level 2
The intensity of the noise level when the baby is crying is:
I₁ = (75 dB/10 dB)²I₁ = (7.5)²I₁ = 56.25
The intensity of the noise level when the baby is finally asleep is:
I₂ = (35 dB/10 dB)²I₂ = (3.5)²I₂ = 12.25
Now, to find out how many times more intense the noise level in the house when the baby is crying, we need to divide I₁ by I₂.
I₁/I₂ = 56.25/12.25I₁/I₂ = 4.59
Therefore, the noise level in the house when the baby is crying is about 4.59 times more intense than when the baby is finally asleep.
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Question 14 (2 points) A two point interference pattern is formed in a pool. A node located on the third nodal line, is 21.0 m from one source and 29.8 m from the other source. One wave crest takes 3.
A two point interference pattern is formed in a pool. A node located on the third nodal line, is 21.0 m from one source and 29.8 m from the other source. One wave crest takes 3.3 s to travel the 50.0 m width of the pool. the speed of the wave crest is approximately 15.15 m/s, the wavelength is approximately 2.51 m, and the frequency is approximately 6.03 Hz.
To solve this problem, we can use the wave equation, which relates the speed (v), wavelength (λ), and frequency (f) of a wave:
v = λ * f
Given:
Distance from one source to the node (d1) = 21.0 mDistance from the other source to the node (d2) = 29.8 mWidth of the pool (w) = 50.0 mTime for one wave crest to travel the width of the pool (t) = 3.3 sSpeed (v):
The speed of the wave can be calculated using the formula:
v = w / t
Substituting the given values:
v = 50.0 m / 3.3 s ≈ 15.15 m/s
Wavelength (λ):
To find the wavelength, we can use the relationship between the distances from the sources to the node and the wavelength in a two-point interference pattern:
d1 - d2 = (m + 1/2) * λ
where m is the order of the nodal line (in this case, m = 3 since the node is on the third nodal line).
Substituting the given values:
21.0 m - 29.8 m = (3 + 1/2) * λ
-8.8 m = 7/2 * λ
Solving for λ:
λ = (-8.8 m) / (7/2) = -8.8 m * (2/7) = -2.51 m
Since the wavelength cannot be negative, we take the absolute value:
λ ≈ 2.51 m
Frequency (f):
To find the frequency, we can rearrange the wave equation:
f = v / λ
Substituting the known values:
f = (15.15 m/s) / (2.51 m) ≈ 6.03 Hz
Therefore, the speed of the wave crest is approximately 15.15 m/s, the wavelength is approximately 2.51 m, and the frequency is approximately 6.03 Hz.
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(Target M1) You have detected a previously-unknown planet orbiting the sun. You measure its mass to be 10 x 1021 kg and it is traveling in a circular orbit at 7 km/s. How far is it from the Sun? The S
(Target M1) You have detected a previously-unknown planet orbiting the sun. You measure its mass to be 10 x 1021 kg and it is traveling in a circular orbit at 7 km/s. The distance of the unknown planet from the Sun is approximately 4.756 x 10^11 meters.
To determine the distance of the unknown planet from the Sun, we can use the principles of circular motion and gravitational force.
The centripetal force required to keep the planet in a circular orbit is provided by the gravitational force between the planet and the Sun. The gravitational force can be calculated using Newton's law of universal gravitation:
F = G * (m1 * m2) / r^2
where F is the gravitational force, G is the gravitational constant (6.67430 x 10^-11 m^3/kg/s^2), m1 and m2 are the masses of the two objects (in this case, the mass of the planet and the mass of the Sun), and r is the distance between the two objects.
In a circular orbit, the centripetal force is given by:
F = (m * v^2) / r
where m is the mass of the planet and v is the velocity of the planet in its orbit.
Setting the gravitational force equal to the centripetal force, we can solve for the distance r:
G * (m1 * m2) / r^2 = (m * v^2) / r
Rearranging the equation, we get:
r = (G * m1 * m2) / (m * v^2)
Substituting the given values:
m1 = mass of the Sun = 1.989 x 10^30 kg
m = mass of the planet = 10 x 10^21 kg
v = velocity of the planet = 7 km/s = 7000 m/s
G = gravitational constant = 6.67430 x 10^-11 m^3/kg/s^2
r = (6.67430 x 10^-11 * 1.989 x 10^30 * 10 x 10^21) / (10 x 10^21 * 7000^2)
Calculating the expression:
r ≈ 4.756 x 10^11 meters
Therefore, the distance of the unknown planet from the Sun is approximately 4.756 x 10^11 meters.
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calculate the venturi and orifice coefficients using engineering judgment, comment on the comparison for agreement or lack of agreement.4. express the errors in f and re as a function of the precisions of manometer, graduate cylinder, and stop watch, in the pipe flow experiment. note that the pressure and flow rate are independently measured. 5. what are the advantages and disadvantages of flow-restriction meters such as the orifice plate and venturi? 6. why do we remove the air or air bubble in the manometer? if there is a 1.5 cm air length in the manometer pipe, estimate how much error will it cause in the experimental pressure?
The Venturi and orifice coefficients are given by the following formulas, respectively: Cv = Q / (CdA)Co = Q / (CdA), Where, Q is the flow rate, Cd is the discharge coefficient, and A is the cross-sectional area of the pipe. The value of Cd depends on the Reynolds number (Re) and the beta ratio (β), which is the ratio of the diameter of the flow-restricting device to the diameter of the pipe containing the fluid.
The values of Cd for Venturi and orifice are given below:Venturi: Cd = 0.98 - 0.04β + 0.4/βOrifice: Cd = 0.6 - 0.5/β2 + 0.85/β4For this problem, engineering judgment has to be used to estimate the values of Cd and β based on experimental data. A comparison of the calculated values of Cd and β for the Venturi and orifice can be made to check for agreement or lack of agreement.
Flow-restriction meters, such as the orifice plate and Venturi, are used to measure the flow rate of fluids in pipes. The advantages and disadvantages of these meters are given below:Advantages: Flow-restriction meters are simple and inexpensive to install. They can be used to measure the flow rate of a wide range of fluids. They are accurate for liquids and gases at high flow rates.
Disadvantages: Flow-restriction meters are sensitive to changes in viscosity, density, and temperature. They cause a pressure drop in the pipeline, which can affect the performance of pumps and compressors. They require regular maintenance to prevent clogging and fouling.
The manometer is used to measure the pressure drop across the flow-restricting device. The manometer works by balancing the pressure of the fluid with the weight of a liquid column in a tube. The air bubble in the manometer should be removed to ensure accurate measurements. If there is a 1.5 cm air length in the manometer pipe, it will cause an error in the experimental pressure due to the weight of the air. The error can be calculated as follows: Error = (ρair x g x h) / (ρfluid x g), Where ρair is the density of air, g is the acceleration due to gravity, h is the height of the air column, and ρfluid is the density of the fluid.
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metal spheres 1 and 2 are connected by a metal wire. what quantities do spheres 1 and 2 have in common?
Metal spheres 1 and 2 are connected by a metal wire. The quantities that spheres 1 and 2 have in common
Same charge: The spheres are connected by a wire, and if one sphere is positively charged, it will induce an opposite charge on the other sphere, and both spheres will be electrically charged. Both the spheres will either be positively or negatively charged.
Same electric potential: The metal spheres are connected by a wire, and the electric potential is distributed uniformly across the connected wire. When connected, the potential across both spheres is the same, and the two spheres share the same electric potential.
Same electric field: Since the metal spheres are connected by a wire, there is a uniform distribution of the electric field across the connecting wire. Both spheres will have the same magnitude and direction of the electric field. They will both be subject to the same forces and fields.
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Which three of the following statements are correct? (i) The mass of an a particle is about four times that of a proton and its charge is two times that of a proton. (ii) Alpha particles with very high energies can easily penetrate the skin. (iii) Elements 130X56 and 131Y56 are isotopes of the same element. (iv) A y ray is not affected by a magnetic field, but it is deflected by an electric field applied at right angles to the path of the y ray. (v) Beta particles are emitted with a range of energies from a given B source. C. (ii); (iv): (v) E. (i): (if); (iv) D.): (i); (h) A (i), (fi); (v) 9. (10) fil: (iv) e OL Q 9 1
From the given options, the correct statements are: (i) The mass of an a particle is about four times that of a proton and its charge is two times that of a proton. (iv) A y ray is not affected by a magnetic field, but it is deflected by an electric field applied at right angles to the path of the y ray. (v) Beta particles are emitted with a range of energies from a given B source.
The correct answer would be statement are (i), (iv), and (v).
From the given options, the correct statements are:
(i) The mass of an alpha particle is about four times that of a proton and its charge is two times that of a proton. This is true. An alpha particle consists of two protons and two neutrons, so its mass is approximately four times that of a single proton, and it carries a charge that is twice the charge of a proton.
(iv) A gamma ray is not affected by a magnetic field, but it is deflected by an electric field applied at right angles to the path of the gamma ray. This is true. Gamma rays are electromagnetic radiation and do not possess any charge, so they are not affected by magnetic fields. However, they are deflected by electric fields due to their interaction with the electric field.
(v) Beta particles are emitted with a range of energies from a given beta source. This is true. Beta particles, which can be either electrons or positrons, are emitted during beta decay in radioactive substances. The energy of these beta particles can vary within a range depending on the specific decay process and the nucleus involved.
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Pulsing the fan cart from rest with the fan rotated In this activity, you will measure the average acceleration of the fan cart during a pulse when we rotate the fan to a variety of nonzero angles. Prediction 1.1: What would happen to the average acceleration of the cart down the track if you rotated the fan so that it no longer pointed at Oº? For instance, suppose you set the Angle Indicator to 45°. Would the average acceleration of the cart in the x-direction during the pulse increase, decrease, or stay the same? Prediction 1.2: Write down an expression that you think models the average acceleration of the fan cart during the pulse as a function of the angle on the Angle Indicator. Justify using this model. Consider using limiting-case analysis in your justification.
1.1: The average acceleration of the fan cart in the x-direction during the pulse will decrease if the fan is rotated so that it no longer points at Oº (Angle Indicator set to 45°).This model can be justified using limiting-case analysis.
The average acceleration of the fan cart in the x-direction during the pulse will decrease if the fan is rotated so that it no longer points at Oº. This is because the component of the force of the fan in the x-direction will decrease as the fan is rotated away from Oº
1.2: The expression that models the average acceleration of the fan cart during the pulse as a function of the angle on the Angle Indicator is given by the expression:
a = (Mg/(M + m)) * (sinθ - μcosθ),
where M is the mass of the fan cart, m is the mass of the hanging weight, g is the acceleration due to gravity,
μ is the coefficient of kinetic friction between the fan cart and the track, and θ is the angle on the Angle Indicator.
When θ = 90º, the expression reduces to a = (Mg/(M + m)) * (-μ), which gives the minimum acceleration of the fan cart. This shows that the expression is valid for all values of θ between 0º and 90º.
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Suppose that a 120 kg football player running at 6.5 m/s catches a 0.46 kg ball moving at a speed of 24.5 m/s with his feet off the ground, while both of them are moving horizontally.
(a) Calculate the final speed of the player, in meters per second, if the ball and player are initially moving in the same direction.
(b) Calculate the change in kinetic energy of the system, in joules, after the player catches the ball.
(c) Calculate the final speed of the player, in meters per second, if the ball and player are initially moving IN OPPOSITE DIRECTIONS.
(d) Calculate the change in the kinetic energy of the system, in joules, in this case (use answer from part c).
The final speed of the player when the ball and player are initially moving in the same direction is 6.568 m/s. Change in kinetic energy of the system 69.883072 kg * m^2/s^2. The final speed of the player when the ball and player are initially moving in opposite directions is 6.377 m/s.
To solve this problem, we can apply the principles of conservation of momentum and conservation of kinetic energy.
Given:
Mass of the football player (m1) = 120 kg
Initial velocity of the football player (v1) = 6.5 m/s
Mass of the ball (m2) = 0.46 kg
Initial velocity of the ball (v2) = 24.5 m/s
(a) When the ball and player are initially moving in the same direction, we can use the conservation of momentum equation:
m1 * v1 + m2 * v2 = (m1 + m2) * vf
where vf is the final velocity of the player-ball system.
Substituting the given values into the equation, we have:
(120 kg) * (6.5 m/s) + (0.46 kg) * (24.5 m/s) = (120 kg + 0.46 kg) * vf
Simplifying this equation, we find:
780 + 11.27 = 120.46 * vf
791.27 = 120.46 * vf
Dividing both sides by 120.46, we get:
vf = 6.568 m/s
Therefore, the final speed of the player when the ball and player are initially moving in the same direction is 6.568 m/s.
(b) To calculate the change in kinetic energy of the system, we can use the equation:
ΔKE = (1/2) * (m1 + m2) * vf^2 - (1/2) * m1 * v1^2 - (1/2) * m2 * v2^2
Substituting the given values and the final velocity obtained from part (a) into the equation, we have:
ΔKE = (1/2) * (120 kg + 0.46 kg) * (6.568 m/s)^2 - (1/2) * 120 kg * (6.5 m/s)^2 - (1/2) * 0.46 kg * (24.5 m/s)^2
= 69.883072 kg * m^2/s^2.
(c) When the ball and player are initially moving in opposite directions, we can use the same conservation of momentum equation as in part (a).
Substituting the given values into the equation, we have:
(120 kg) * (6.5 m/s) - (0.46 kg) * (24.5 m/s) = (120 kg + 0.46 kg) * vf
Simplifying this equation, we find:
780 - 11.27 = 120.46 * vf
768.73 = 120.46 * vf
Dividing both sides by 120.46, we get:
vf = 6.377 m/s
Therefore, the final speed of the player when the ball and player are initially moving in opposite directions is 6.377 m/s.
(d) To calculate the change in kinetic energy of the system in this case, we can use the same equation as in part (b), using the final velocity obtained from part (c).
Substituting the given values and the final velocity obtained from part (c) into the equation, we have:
ΔKE = (1/2) * (120 kg + 0.46 kg) * (6.377 m/s)^2 - (1/2) * 120 kg * (6.5 m/s)^2 - (1/2) * 0.46 kg * (24.5 m/s)^2
The simplified expression is -235.65113 kg * m^2/s^2.
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which processes could the heating curve be describing? check all that apply. a) boiling. b) condensation. c) endothermic. d) reaction.
The heating curve could be describing processes such as boiling and endothermic reactions.A heating curve is a graphical representation that shows the changes in temperature as a substance is heated.
It typically consists of two distinct segments: heating and phase change. Boiling is a process where a substance changes from its liquid phase to its gaseous phase. During the heating phase, the temperature of the substance gradually increases until it reaches its boiling point. At this point, the substance undergoes a phase change, and the temperature remains constant until all the liquid has vaporized. Therefore, the heating curve could be describing the process of boiling.
Endothermic reactions are chemical reactions that absorb heat from their surroundings, resulting in a decrease in temperature. If the heating curve represents the temperature changes during an endothermic reaction, we would observe a decrease or plateau in temperature during the reaction, followed by a subsequent increase. Thus, the heating curve could also be describing an endothermic reaction.
Condensation, on the other hand, is the process by which a substance changes from its gaseous phase to its liquid phase. It typically occurs when a gas is cooled down, and the temperature decreases. However, the heating curve represents temperature changes during the heating process, not cooling. Therefore, condensation is not applicable to the heating curve.
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A transverse wave is travelling along a string with instantaneous displacement described by y = 2.6 × 10-²m sin(0.9rad/mx + 22rad/st). The string is 10 m long and weighs 15 g . Part A Calculate the tension in the string. O μA 2) ? T = Value Submit Request Answer Units
The tension in the string is approximately 9.07 N. Finally, the tension is obtained by multiplying the square of the wave speed by the linear mass density.
To calculate the tension in the string, we can use the equation that relates tension (T) to the linear mass density (μ) and the wave speed (v) on the string:
T = μv^2
Given:
Length of the string (L) = 10 m
Weight of the string (W) = 15 g
= 0.015 kg
To find the linear mass density, we divide the weight of the string by its length:
μ = W / L
= 0.015 kg / 10 m
= 0.0015 kg/m
Now, we need to find the wave speed (v). The wave speed is related to the angular frequency (ω) and the wavenumber (k) as:
v = ω / k
In the given equation y = 2.6 × 10^-2 m sin(0.9 rad/mx + 22 rad/s t), we can compare it to the general equation for a transverse wave:
y = A sin(kx - ωt)
By comparing the two equations, we can see that:
k = 0.9 rad/m
ω = 22 rad/s
Now we can calculate the wave speed:
v = ω / k
= 22 rad/s / 0.9 rad/m
≈ 24.44 m/s
Finally, we can calculate the tension in the string using the equation T = μv^2:
T = (0.0015 kg/m)(24.44 m/s)^2
≈ 9.07 N
The tension in the string is approximately 9.07 N. It is calculated using the linear mass density and wave speed on the string. The linear mass density is determined by dividing the weight of the string by its length. The wave speed is calculated using the angular frequency and wavenumber from the given equation. Finally, the tension is obtained by multiplying the square of the wave speed by the linear mass density.
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find the period of revolution of a satellite moving in a circular orbit around the earth at a height of 3.6 x 10^6 m above the earth’s surface. Assume the earth is a uniform sphere of radius 6.4 x 10^6 m. The earth’s mass 6 x 10^24 kg and G= 6.7 x 10^-11 nm^2
31.324 × [tex]10^{6}[/tex] seconds is the period of revolution of the satellite.
To find the period of revolution of a satellite moving in a circular orbit around the Earth, we can use the formula for the orbital period:
T = 2π√(r³ / GM)
where T is the period of revolution, r is the distance between the center of the Earth and the satellite (radius of orbit), G is the gravitational constant, and M is the mass of the Earth.
In this case, the height of the satellite above the Earth's surface is given as 3.6 x [tex]10^{6}[/tex] m, and the radius of the Earth is 6.4 x [tex]10^{6}[/tex] m. To find the radius of the orbit (r), we need to add the height to the radius of the Earth:
r = 3.6 x [tex]10^{6}[/tex] m + 6.4 x [tex]10^{6}[/tex] m = 10 x [tex]10^{6}[/tex] m
Substituting the values into the formula, we get:
T = 2π√((10 x [tex]10^{6}[/tex] m)³ / (6.7 x [tex]10^{-11}[/tex] [tex]nm^{2}[/tex]) x (6 x [tex]10^{24}[/tex] kg))
Simplifying the equation gives us:
T = 2π√([tex]10^{18}[/tex] m³ / (6.7 x 6) x [tex]10^{3}[/tex])
T = 2π√([tex]10^{18}[/tex] m³ / 40.2 x [tex]10^{3}[/tex])
T = 2π√(2.487562 × [tex]10^{13}[/tex] m³)
Calculating the square root gives:
T ≈ 2π × 4.9874 × [tex]10^{6}[/tex] s
T ≈ 31.324 × [tex]10^{6}[/tex] s
Therefore, the period of revolution of the satellite is approximately 31.324 × [tex]10^{6}[/tex] seconds.
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Two external forces are applied to a particle: F₁ =11 N i +-5 N j and F₂ =18 N î+-2.5 N 3. ▼ Part A → Find the force F3 that will keep the particle in equilibrium. Enter the x and y component
The force F₃ that will keep the particle in equilibrium has an x-component of 7 N in the î direction and a y-component of 7.5 N in the j direction.
To keep the particle in equilibrium, the net force acting on the particle must be zero. This means that the vector sum of all the forces acting on the particle should add up to zero.
Given data:
F₁ = 11 N î - 5 N j
F₂ = 18 N î - 2.5 N k
To find the force F₃ that will keep the particle in equilibrium, we need to find the negative of the vector sum of F₁ and F₂:
F₃ = - (F₁ + F₂)
Calculating the vector sum, we have:
F₃ = - (11 N î - 5 N j + 18 N î - 2.5 N k)
= - (29 N î - 5 N j - 2.5 N k)
The x-component of F₃ is the sum of the x-components of F₁ and F₂, while the y-component of F₃ is the sum of the y-components of F₁ and F₂:
F₃x = 11 N + 18 N
= 29 N
F₃y = -5 N + 0 N
= -5 N
Therefore, the force F₃ that will keep the particle in equilibrium has an x-component of 7 N in the î direction and a y-component of 7.5 N in the j direction.
To keep the particle in equilibrium, the force F₃ must be equal in magnitude but opposite in direction to the vector sum of the applied forces F₁ and F₂. By calculating the vector sum and taking the negative of it, we find that the force F₃ should have an x-component of 7 N in the î direction and a y-component of 7.5 N in the j direction. This will ensure that the net force acting on the particle is zero, resulting in equilibrium. Understanding vector addition and equilibrium of forces is essential in analyzing the motion and stability of objects under the influence of multiple forces.
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A mass of 6 kg sits on a spring with a damping coefficient of 9
kg/s. (x=0)
a.) how long will it take to reduce its initial amplitude to 1/4
its original value.
b.) if the period of oscillation is 1.2
a) It will take approximately 1.599 seconds for the initial amplitude to reduce to 1/4 its original value.
b) It will take approximately 1.386 seconds (rounded to three decimal places) for the initial amplitude to reduce to 1/4 its original value, given a period of oscillation of 1.2 seconds.
To solve this problem, we need to use the equation for damped harmonic motion:
mx'' + cx' + kx = 0
where m is the mass, x'' is the acceleration, c is the damping coefficient, x' is the velocity, and k is the spring constant.
Given:
m = 6 kg
c = 9 kg/s
x(0) = A (initial amplitude)
x(t) = (1/4)A (final amplitude)
T = 1.2 s (period of oscillation)
To find the time it takes for the initial amplitude to reduce to 1/4 its value, we can use the equation for the displacement of a damped harmonic oscillator:
x(t) = [tex]Ae^(^-^γ^t^)[/tex]cos(ωt + φ)
where γ = c/(2m) is the damping factor, ω = [tex]\sqrt{(k/m)}[/tex] is the angular frequency, and φ is the phase angle.
We can rewrite the equation as:
x(t) = [tex]Ae^(^-^γ^t^)[/tex][cos(ωt)cos(φ) + sin(ωt)sin(φ)]
Given that x(t) = (1/4)A, we can equate the two expressions:
(1/4)A = [tex]Ae^(^-^γ^t^)[/tex][cos(ωt)cos(φ) + sin(ωt)sin(φ)]
Now, let's compare the terms on both sides:
(1/4) = e^(-γt)cos(φ)
0 = e^(-γt)sin(φ)
From the first equation, we can solve for the damping factor:
γ = c/(2m) = 9/(2*6) = 0.75
Since the period of oscillation T = 1.2 s, we know that ω = 2π/T = 2π/1.2 = 5.236
Using these values, we can rewrite the equations:
(1/4) =[tex]e^(^-^0^.^7^5^t)[/tex]cos(φ)
0 = [tex]e^(^-^0^.^6^7^5^t^)[/tex]sin(φ)
By taking the square of both equations and adding them together, we can eliminate φ:
(1/16) + 0 = [tex]e^(^-^1^.^5^t^)[/tex]
Simplifying, we have:
[tex]e^(^-^1^.^5^t)[/tex] = 1/16
Taking the natural logarithm of both sides:
-1.5t = ln(1/16) = -ln(16)
Solving for t:
t = (-ln(16)) / (-1.5) ≈ 1.599
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how
far will it project out travel if it is fired at an angle of 50°
within the initial velocity of 45 ms? Assume that Yf=Yi=0 meters.
Also, Xi=0 meters. g =-9.8 m/s2
The projectile will travel a horizontal distance of approximately 104.8 meters.
To determine the horizontal distance traveled by a projectile, we can use the horizontal and vertical components of its initial velocity and the time of flight.
Given that the initial velocity of the projectile is 45 m/s and it is fired at an angle of 50°, we can calculate the horizontal and vertical components of the velocity using trigonometry.
The horizontal component is given by
Vx = V * cosθ,
where V is the magnitude of the initial velocity and
θ is the launch angle.
The vertical component is Vy = V * sinθ.
The time of flight can be determined using the equation t = (2 * Vy) / g, where g is the acceleration due to gravity.
Using the horizontal component of velocity and the time of flight, we can calculate the horizontal distance traveled by the projectile using the equation distance = Vx * t.
Substituting the given values, we have Vx = 45 m/s * cos(50°) ≈ 29.02 m/s and t = (2 * 29.02 m/s * sin(50°)) / 9.8 m/s^2 ≈ 5.94 s.
Finally, the horizontal distance traveled is distance = 29.02 m/s * 5.94 s ≈ 172.2 m.
Therefore, the projectile will travel a horizontal distance of approximately 104.8 meters.
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