Answer:Hence, if a particle is moving with constant speed such that its acceleration with constant magnitude will be always perpendicular to its velocity, then it must be going in a circular path.
Explanation:
which of the following does not accurately describe earth's distance from the sun? which of the following does not accurately describe earth's distance from the sun? earth is closest to the sun in january (perihelion). due to earth's circular orbit, it is always equidistant from the sun throughout the year. the earth-sun distance averages 150 million kilometers (93 million miles). it takes light an average of 8 minutes and 20 seconds to travel from the sun to earth. earth is farthest away from the sun in july (aphelion).
The following are incorrect estimates of Earth's distance to the Sun:
The earth constantly orbits the sun equally throughout the year because of its round orbit.it takes light an average of 8 minutes and 20 seconds to travel from the sun to earth. Explain the revolution of earth around sun?Revolution is the name for the earth's fixed orbital motion around the sun.
The Sun's gravitational force causes the Earth to revolve, creating an elliptical orbit.
An elliptical orbit is just a circle that has been flattened or has an extended route with two distinct foci. The eccentricity of the Earth's orbit, or how far from a circle it deviates from, is roughly 0.01671.According to the stars, the Earth orbits the sun in 365 days, 6 hours, and 9 minutes, rotating at a speed between 29.29 and 30.29 km/s. Every four year, which is known as a leap year, the 6 hours, 9 minutes add up to roughly one extra day, with February 29th being the added day. The eccentric orbit of Earth makes its closest point to a sun, or perihelion, on or around January 4th of every year. Six months later, at 152,100,000 km, is aphelion.Thus, the following are incorrect estimates of Earth's distance to the Sun:
The earth constantly orbits the sun equally throughout the year because of its round orbit.it takes light an average of 8 minutes and 20 seconds to travel from the sun to earth.To know more about the revolution of earth, here
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which of the following is not a characteristic of the outer planets? group of answer choices they all have rings. their orbits are separated by relatively large distances. they have very few, if any, satellites. they are all large balls of gas. they are primarily made of hydrogen and helium.
The correct answer is they are all large balls of gas. The outer planets also have rings, their orbits are separated by relatively large distances, and they have numerous satellites.
The outer planets are not all large balls of gas. Instead, the outer planets are composed mostly of gas and ice, with the four giant planets being composed mostly of hydrogen and helium. The outer planets are composed of a variety of materials, including rocks and ice, and are not all large balls of gas. They are mostly composed of a large, rocky core surrounded by a thick atmosphere of gas. Unlike the inner planets, which are solid, the outer planets are mostly composed of gas and lack a solid surface. These gas giants are much larger than the inner planets, with enormous gravitational fields and strong magnetic fields. They also have numerous satellites and rings of dust, ice, and rock orbiting them.
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three vehicles approach an uncontrolled intersection. car a wants to make a left turn and is across the intersection from car b. car b is ahead of car c and both are in the same lane traveling in the same direction and want to proceed straight through the intersection. the law gives the right-of-way:
Three cars are coming up to an uncontrolled intersection. Across from Car B at the intersection, Car A wants to turn left. According to the legislation, Vehicle B has the right-of-way.
Explain the rules and law of roads?Right-of-Way Rules:
Whenever vehicles, pedestrians, and bikes collide on the road, right-of-way regulations make it clear who should move first. The right-of-way belongs to the car that approaches the intersection first.The driver who has that right-of-way must yield to other cars, bikes, and pedestrians.Intersections:
Any location where one road joins another is considered an intersection. Controlled intersections have signage or lighting for the traffic signals.Any location where one road joins another is considered an intersection. Controlled intersections have signage or lighting for the traffic signals.Automobiles, bicycles, and pedestrians upon it through route (moving forward straight) have always had the right-of-way at T intersections lacking STOP or YIELD signs.Look for pedestrians before making a left turn. Any approaching pedestrian or dangerously close vehicle must be given the right of way.Three cars are coming up to an uncontrolled intersection. Across from Car B at the intersection, Car A wants to turn left.
Thus, according to the legislation, CAR B has the right-of-way.
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The complete question is-
Three vehicles approach an uncontrolled intersection. Car A wants to make a left turn and is across the intersection from Car B. Car B is ahead of Car C and both are in the same lane traveling in the same direction and want to proceed straight through the intersection. The law gives the right-of-way:
To Car A Only.
To Car A and Then Car B.
To Car B and then Car A.
To Car B.
heat transfer by conduction occurs when: group of answer choices electromagnetic waves travel from one place to another through a vacuum electrons bump into atoms and other electrons large numbers of atoms move from place to place atoms give off heat in the form of electromagnetic waves
Heat transfer by conduction occurs when large numbers of atoms move from place to place.
Conduction is the transfer of heat through a material by the movement of molecules or electrons from a region of higher temperature to a region of lower temperature. In this process, heat energy is transferred from one molecule to another through molecular collisions. This transfer of energy continues until thermal equilibrium is reached, i.e., when the temperature is the same throughout the material.
Electromagnetic waves traveling from one place to another through a vacuum is an example of heat transfer by radiation. Electrons bumping into atoms and other electrons is an example of heat transfer by convection. Atoms giving off heat in the form of electromagnetic waves is an example of heat transfer by radiation.
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over the course of a single night, does the position of mars in its home constellation change dramatically? group of answer choices yes no
Over the course of a single night, the position of mars in its home constellation do not change dramatically. Correct answer us no.
The position of Mars in its home constellation changes over the course of a single night, but not dramatically. Mars, like all celestial objects, appears to move across the night sky due to the rotation of the Earth.
However, the magnitude of this change in position over the course of a single night is not usually considered to be "dramatic" in astronomical terms. The apparent motion of Mars across the night sky is relatively slow, and its position relative to the surrounding stars may only change by a few degrees over the course of several hours.
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Student 1: The speed of the block at its maximum height is zero because the kinetic energy is a minimum at the top of the trajectory. Student 2: Only the vertical component of the velocity is zero at the maximum height, because the vertical component of the acceleration is zero at the top of the trajectory.
It is true that the maximum speed of a block in a trajectory occurs at its maximum height, where the vertical component of the velocity is zero. This is due to the fact that at that point, the kinetic energy is minimized and the acceleration is zero. At this point, the block is at its highest point, and the velocity of the block is at its lowest. Therefore, the speed is zero at the top of the trajectory.
However, the horizontal component of the velocity is not zero at the maximum height. This is because the block is constantly subject to horizontal acceleration by gravity, even at its highest point. This means that the block has a nonzero velocity in the horizontal direction, even if it is at its maximum height. Therefore, the block is not at rest at the highest point; it is just moving horizontally at a constant speed.
an airplane flies from joint base lewis mcchord (jblm) to a undisclosed location 80 km south and 200 km east. in what direction should the plane fly?
Greetings from Joint Base Lewis-McChord, the base where I Corps and the 62 Airlift Wing are based. The flagship military facility on the West Coast for the Department of Defence is Joint Base Lewis-McChord, which is situated in the Puget Sound area of the Pacific Northwest.
What is the joint base lewis mcchord (jblm)?JBLM, the sole Army Power Projection Platform west of the Rocky Mountains, has since expanded to become the largest Army-led joint post in the United States.
Because of the 100 km/h speed, the net spirit of the plane will be in this activity. In order to determine the plane's motion with respect to the north, we first locate the theatre.
The calculation would be 100 km/h divided by 300 km/h. According to the formula, three would win 10 thetas.
Therefore, The plane's motion's angle determines whether it is respectable.
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i] Observe the following picture and answer the given question which evidence of evolution is shown in above picture? what does this evidence indicate? give one more example of evidence of evolution.
The evolution that is shown in the picture that we have here is the evolution of humans from Chimpanzees.
What is evolution?
Evolution is the process by which species of living organisms change over generations through a combination of genetic variation, mutation, natural selection, and genetic drift. The theory of evolution explains how species have changed over time to become the diverse forms that exist today, and provides a scientific explanation for the relatedness of different species.
The evidence in the picture tells us that came to be through mutations and generic drift from the Chimpanzee.
An example of evolution would be: evidence that is gotten from fossils.
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what’s the energy when the ball hits the surface and is changing its shape
Answer:
it is elastic potential energy
Explanation:
Please answer these question asap.
An airplane flies 170km in 15 min in the given case.
To find the average speed, we divide the total distance by the time taken:
Average. speed = Total distance / Time taken
In this case, the total distance is 170 km and the time taken is 15 min. However, it's more common to express speed in km/hr, so we need to convert 15 min to hours:
15 min = 15/60 = 0.25 hours
Now we can calculate the average speed:
Avg. speed = 170 km / 0.25 hours = 680 km/hr
Therefore, the average speed of the airplane is 680 km/hr.
Q1b. Sarah rides her horse with a constant speed of 20 km/hr. How far can she travel in 4 hours?
To find the distance Sarah can travel in 4 hours, we multiply her speed by the time:
Distance = Speed x Time
In this case, Sarah's speed is 20 km/hr and the time is 4 hours, so:
Distance = 20 km/hr x 4 hours = 80 km
Therefore, Sarah can travel 80 km in 4 hours on her horse.
Q2a. An airplane flies at a constant speed of 780 miles per hour. How long will it take to travel a distance of 2635 miles?
To find the time it takes the airplane to travel a distance of 2635 miles, we divide the distance by the speed:
Time = Distance / Speed
In this case, the distance is 2635 miles and the speed is 780 miles per hour, so:
Time = 2635 miles / 780 miles per hour ≈ 3.38 hours
Therefore, it will take the airplane approximately 3.38 hours to travel a distance of 2635 miles at a constant speed of 780 miles per hour.
Q2b. An airplane flies at a constant speed of 540 miles per hour. How long will it take to travel a distance of 2160 miles?
To find the time it takes the airplane to travel a distance of 2160 miles, we divide the distance by the speed:
Time = Distance / Speed
In this case, the distance is 2160 miles and the speed is 540 miles per hour, so:
Time = 2160 miles / 540 miles per hour = 4 hours
Therefore, it will take the airplane 4 hours to travel a distance of 2160 miles at a constant speed of 540 miles per hour.
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eight 7 w christmas tree lights are connected in series to each other and to a 120v source. what is the resistance of each bulb
From the information provided, each christmas tree bulb has a resistance of approximately 257.4 Ω.
To determine the resistance of each bulb, we first need to find the total resistance of the circuit. We can use Ohm's law to do this:
V = IR
where V is the voltage (120 V), I is the current, and R is the total resistance. Since the lights are connected in series, the current is the same through each bulb. We can use the power of each bulb (7 W) and the voltage to find the current:
P = IV
I = P/V = 7 W / 120 V = 0.0583 A
Now we can use Ohm's law to find the total resistance:
R = V/I = 120 V / 0.0583 A = 2059.5 Ω
Since there are eight bulbs, each bulb has the same resistance. We can find the resistance of each bulb by dividing the total resistance by the number of bulbs:
R_each = R_total / number of bulbs = 2059.5 Ω / 8 = 257.4 Ω
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what is the magnitude of the total force (in n) acting on the smiley face? do not type units in the answer box, or use scientific notation.
The formula below demonstrates how the mass of an item multiplied by its acceleration determines the size of the net force acting on it. When there is no net force acting on an object, it is in a condition known as equilibrium and is not moving forward.
What is the magnitude of the total force?Magnitude is the term used to describe a quantity's numerical value, which provides information on the strength of that quantity. As a result, the strength of a force is expressed by its magnitude.
When two forces of equal size are working in opposite directions—one in the east and the other in the west—the results of the two forces are not the same. Hence, both magnitude and direction must be provided in order to accurately characterize a force.
Therefore, [tex]F_n = 183.3 N[/tex] is the magnitude of the total force (in n) acting on the smiley face.
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You are trying to push a 70kg crate out the back door. The force of friction between the crate and the floor is 275 N, and you push horizontally. How hard must you push to move the crate with a constant speed? If you push with a force of 380 N, what will be the crates acceleration? If her crates moved from rest, what will be the crate’s final velocity if you push with a force of 380 N for 6s?
(a) The acceleration of the crate is 1.5 m/s^2
(b) The crate’s final velocity is 9 m/s.
What will be the crates acceleration?
To move the crate with a constant velocity, the force you apply must equal the force of friction. So, to move the crate, you must push with a force of 275 N.
If you push with a force of 380 N, the net force on the crate will be;
F (net) 380 N - 275 N = 105 N.
The acceleration of the crate will be given by Newton's second law of motion:
a = F / m
where;
a is the acceleration, F is the net force, and m is the mass of the crate.So, substituting in the known values, we get:
a = 105 N / 70 kg = 1.5 m/s^2
Finally, if the crate started from rest, its final velocity after 6 seconds can be found using the equation:
v = at
v = 1.5 m/s^2 x 6s = 9 m/s
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While a _______ is a group of closely related phenomena or observations, _______ is a logical idea that can be tested.
Your logical hypothesis is now subjected to methodical testing to support or refute the assumption. There are a number of factors that can affect an empirical hypothesis, causing modifications and leading to certain results.
What hypothesis is a logical idea that can be tested?The approach uses sample data. Data collection: We take a representative sample of the population. Making a Decision: We contrast the sample results with the population-based hypothesis.
In most cases, we contrast the estimated value of the population parameter with the value of a statistic calculated from the sample data.
A statement that can be supported by observations or tests concerning the natural world is called a hypothesis. Hypotheses must be falsifiable—that is, they must be formulated in a fashion that allows them to be disproven—and be evaluated scientifically in order to be considered to be true.
Therefore, while a theory is a group of closely related phenomena or observations, A testable hypothesis is a logical proposition.
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What is moving faster, a 450 kg horse with a momentum of 765 kgm/s or an object with a different mass and momentum?
Therefore, the answer to this question is that it cannot be determined without more information.
The answer to this question can be determined by comparing the velocity of the two objects.
The formula for momentum is:
momentum = mass × velocityWe can rearrange this formula to solve for velocity:
velocity = momentum / mass For the horseWe can plug in the given values:
velocity = 765 kgm/s / 450 kg velocity = 1.7 m/sFor the other object, we do not have enough information to determine its velocity. We would need to know its mass and momentum in order to calculate its velocity and compare it to the horse's velocity. Without this information, we cannot determine which object is moving faster. Therefore, the answer to this question is that it cannot be determined without more information.
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10. A wheel with radius 0. 33 m and rotational
inertia 2. 0 kg. M2 spins on an axle with an
initial angular speed of 3. 0 rad/s. Friction in
the axle exerts a torque on the wheel,
causing the wheel to stop after 6. 0 s. The
average torque exerted on the wheel as it
slows down has magnitude
The average torque exerted on the wheel as it slows down has a magnitude of -1.0 Nm.
In this case, the average torque has magnitude T = Iα, where I is the rotational inertia of the wheel and α is the angular acceleration. Using the rotational kinematics equation ωf = ωi + αt, we can calculate the angular acceleration:
α = (ωf - ωi) / t
where ωf is the final angular speed, ωi is the initial angular speed, and t is the time. In this case, ωf = 0, ωi = 3.0 rad/s, and t = 6.0 s, so the angular acceleration is α = -0.5 rad/s2. Plugging this value into the equation for torque, we get
T = 2.0 kg.m2 x (-0.5 rad/s2) = -1.0 Nm.
The negative sign is showing torque is in the opposite direction of the initial angular velocity.
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How does gravity affect the movement of the planets around the sun, stars grouped in galaxies, and galaxies grouped in clusters? Thoroughly explain your answer, making sure to include an example and describe how this force keeps planets in orbit. Make sure to write at least 2-4 sentences and proper conventions (spelling, grammar, punctuation, etc.) to respond. Put all answers in your own words.
The complex dance of gravity between celestial objects is what gives rise to the structures we see in the universe, from planets orbiting stars to galaxies forming clusters.
Gravity is the force that governs the movement of celestial bodies in the universe, including planets around the sun, stars grouped in galaxies, and galaxies grouped in clusters.
For example, the gravity of the sun keeps the planets in orbit around it. The planets are constantly pulled towards the sun by gravity, but they are also moving tangentially to the sun at high speeds. The combination of these two forces creates a balanced system, where the gravitational pull of the sun keeps the planets in their orbits around it.
Similarly, the gravity between stars in galaxies and galaxies in clusters acts as a binding force, keeping them together despite the vast distances between them.
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the resultant static force acting on a submerged inclined plane surface acts: question 7 options: at the centroid of the submerged body above the centroid of the submerged body below the centroid of the submerged body
When a body is entirely or partially submerged in a liquid, the resultant pressure force acting on the body is known as the buoyant force.
When a surface is immersed in a fluid, the pressure force that results on the body operates in all directions perpendicular to the surface. We refer to this as hydrostatic pressure. The density of the fluid and the depth of the point below the surface of the fluid both directly affect the pressure at a given place in the fluid, which is the same in all directions. The pressure also rises as the depth does buoyant force. Any point in a fluid experiences pressure in all directions, making it a scalar quantity.
The weight of the fluid above the point of interest determines this pressure, which is described as the force applied per unit area. It is referred to be an isotropic quality of fluid when the pressure at a particular place in the fluid is the same in all directions.
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what is the net force on a block that is pulled to the right with 50 pounds of force and to the left with 60 pounds of force?
The net force on an object is the overall force acting on it, taking into account the direction and magnitude of all the individual forces. In this case, a block is being pulled to the right with a force of 50 pounds and to the left with a force of 60 pounds.
These forces are in opposite directions, so to find the net force, we need to subtract the force acting to the left from the force acting to the right. This results in a net force of -10 pounds, indicating that there is an overall force acting on the block to the left. This net force would cause the block to accelerate in the opposite direction of the larger force .
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the maximum audible range is about 15 to 20,000 hz. determine the range of wavelengths for sound over this range of frequency. assume room temperature.
The range of the wavelengths for the sound over the audible range of frequencies in room temperature is from 24 meters to 18×10⁻³ meters.
The relation between velocity , wavelength and frequency of a sound is given by the following equation :
⇒ V = λ x ν where, V stands for the velocity of the sound, λ stands for the wavelength, and ν stands for frequency of the sound. To find wavelength, we have to put ν on the left side of the equation which gives us :
λ = V/ν
Velocity of the sound at room temperature ≈ 360m/s
For 15 hertz, Wavelength = V/ν
= 360/15
=24 meters
For 20,000 hertz, Wavelength = V/ν
= 360/20000
=18×10⁻³ meters
Therefore, the audible range of wavelengths is from 24 meters to 18×10⁻³ meters.
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Is the furnace an internal or external combustion engine
The detailed answer of this question is given below:
The furnace is an internal combustion engine.
A furnace is typically considered an internal combustion engine, although it operates differently than many other types of internal combustion engines.
In a furnace, fuel is burned within a combustion chamber, which generates heat that is then used to heat air or water, depending on the type of furnace. This combustion process is similar to that of internal combustion engines, in which fuel is burned inside a combustion chamber to generate heat and power.
However, unlike many internal combustion engines, a furnace does not typically use pistons, cylinders, or other similar components to convert heat into mechanical energy. Instead, the heat generated by the combustion process is typically used directly, either to heat air or water or to provide heat for other processes.
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once a standing wave appears in the string with several nodes, what would happen if you were to carefully hold the string with narrow tweezers at a node (a geometric point)? will the standing wave pattern change or be destroyed?
Standing waves are most often caused by the resonance phenomenon, which happens when waves are reflected back and forth at the resonator's resonant frequency and interfere, causing standing waves to form inside the resonator.
What cause the standing wave pattern change?The observed wave pattern contains points that appear to be standing still, which is why the pattern is typically referred to as a standing wave pattern.
Such patterns can only be produced by specific vibrational frequencies within the medium. The term "harmonics" or "only harmonics" is used to describe these frequencies.
A reflective boundary of some kind is required for a standing wave to form. The shape is then affected by the wave's frequency, the waveguide's length, and the boundary's acoustic impedance.
Therefore, standing wave pattern change.
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which graph of v versus t best describes the motion of a particle with positive velocity and negative acceleration?
A negative slope's graph slopes downhill from left to right. When viewing a graph on a xy coordinate plane, the slope is negative because as x rises, y falls.
What graph about negative downward slope direction?The line is sloped downhill from left to right when there is a negative slope. Here, the inverse link between the two variables depicted along the x- and y-axes of the negative slope graph applies. The other variable decreases when the first variable goes up.
Negative values are below the origin on the y-axis and to the left of the origin on the x-axis. If the x-value is negative, begin at the origin and go to the left. In the event that the y-coordinate is negative, descend.
A line that slopes positively ascends from left to right. Remember that a line with a negative slope descends from left to right.
Therefore, Graph below the x axis and in the negative downward slope direction.
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Does the north pole of a magnet point to the north magnetic pole of the earth? Explain.
The geographic north pole is not shown by a magnetic compass. The earth's magnetic poles, which are distinct from the planet's geographic poles, are shown by a magnetic compass.
What is the magnetic pole of the earth?A magnet will always point northward or southward. A magnet's north pole will always point in the direction of the Earth's geographic north (which is also its magnetic south pole).
Since opposite poles pull together, the earth's magnetic north pole is actually located on the Southern Hemisphere, making it operate like a physical magnet.
The direction of magnetic field lines is set up so that they come out of the north pole of the magnet and go in through the south pole.
Therefore, the magnetic pole that is closest to the geographic north pole of the earth is the south magnetic pole. The law of attraction applies to magnets.
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how much energy is expended, in joules, if a voltage of 13 v moves 1.25 c of charge between two points? round the final answer to one decimal place.
The amount of energy expended, in joules, will be 16.25 J. If the answer is rounded to one decimal place then it will be 16.3 J.
When a charge is moved between two points that have a potential difference, or voltage, across them, work is done by the electric field.
Here energy is transferred as work from one point to the other. The amount of energy transferred, in joules, is the product of the voltage and charge moved.
[tex]Energy = Voltage[/tex] × [tex]Charge[/tex]
We are given that voltage is 13 V and the charge moved is 1.25 C.
Therefore, Energy = 13 V x 1.25 C
Energy = 16.25 J
Therefore, the amount of energy expended is 16.3 J.
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scientists studying the collision of particles note that a certain particle travels around a collider two times every second. if the tube's radius is , with what velocity is the particle traveling?
When two particles, groups of particles, or solid objects move in the same direction and get close enough to each other to interact, they collide.
What is the collision of particles?Even though the particles are travelling swiftly in all directions, collisions between them occur more frequently than in gases because of the closer proximity of the particles.
The equation relating velocity and radius is [tex]= \omega =\frac{v}{r}[/tex]
Because the equation can also be used to determine angular velocity
[tex]\omega = 2 \pi[/tex]f we can set the equations equal and solve for the velocity.
[tex]\frac{v}{r} = 2 \pi f[/tex]
[tex]v= 2 \pi f r[/tex]
Since we are given the radius of [tex]5000 m[/tex] And the frequency of [tex]2Hz[/tex], we can calculate the velocity. (Frequency can be found by the number of times an object travels around a full circle in one second).
[tex]V = 2 \pi (2hz) ( 5000 m) = 2 \pi \times 10^4\frac{m}{s}[/tex]
As an alternative, we can calculate the collider's circumference using its radius.
[tex]C = 2\pi r = 2\pi 5000= 10000\pi[/tex]
Every second, the particle does two full rotations.
[tex]v = \frac{d}{t} = \frac{2(10000\pi )m10^4\frac{}{}}{1s}= 2\pi\times 10^4 \frac{m}{s}[/tex]
Therefore, [tex]2\pi\times 10^4 \frac{m}{s}[/tex] is the velocity of particle while travelling.
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True or false? A gamma ray of wavelength 1.00×10−8 cm has enough energy to remove an electron from a hydrogen atom.
True. A gamma ray has a very short wavelength and high energy, and can ionize atoms by knocking off electrons from their outer shells.
define wavelength ?
Wavelength is the distance between two successive crests or troughs of a wave, or equivalently, the distance traveled by a wave during one complete cycle. It is usually denoted by the Greek letter lambda (λ) and is typically measured in units of length, such as meters or centimeters.
Wavelength is a physical property of waves, such as light waves, sound waves, and water waves. It is defined as the distance between two consecutive points in a wave that are in phase and have the same amplitude and direction of motion. In other words, it is the distance over which the wave's shape repeats.
For example, in a water wave, the wavelength is the distance between two consecutive wave crests or troughs. In a light wave, it is the distance between two consecutive peaks or valleys of the electromagnetic field.
Wavelength is usually measured in meters or other units of length, depending on the type of wave. It is an important characteristic of waves because it is related to other properties, such as frequency and energy. For example, waves with shorter wavelengths have higher frequencies and more energy, while waves with longer wavelengths have lower frequencies and less energy.
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how long will it take the goose to cover a ground distance of 550 km from north to south? (note: even on cloudy nights, many birds can navigate using the earth's magnetic field to fix the north-south direction.)
The goose will take 8.55 hours to travel 550 km at their average speed of 64.3km/h.
The goose average speed is around 40 mph or 64.3 km/h, but in good weather and wind conditions this speed can go up to 70 mph or 112 km/h
Considering the formula:
x = v.t
were x=space, v=speed and t= time. Clearing the equation, to find the hours of flight:
t = x/v = 550km / 64.3km/h = 8.55 hours
Average speed is a useful concept in many fields, including physics, engineering, and transportation. It can be used to calculate travel times, estimate fuel consumption, and analyze the performance of machines and vehicles. However, it is important to note that average speed does not take into account changes in direction or acceleration, which can affect the overall performance of an object.
Average speed is a measure of how quickly an object moves over a certain distance. It is defined as the total distance traveled divided by the time it takes to travel that distance. The units of average speed are usually expressed as distance per unit time, such as kilometers per hour, miles per hour, or meters per second.
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Two large, charged plates with charge density ±30µC/m^2 face each other with a separation of 5.0 mm. The negative plate is grounded, and defined as 0 potential. Find the electric potential at a location 8.0mm from the negative plate, 3.0mm from the positive plate.
V=3.39×10⁶ ×d for 0≤d≤0.005 m, 7.73x10⁷ m/s is the electric potential at a location 8.0mm from the negative plate, 3.0mm from the positive plate
a. Identify the unknown:
The potential everywhere
List the Knowns:
Charge density of the two plates: σ = ±30×10⁻⁶ C/m²
Distance between the two plates: d=5×10⁻³ m
Permittivity of free space: ε₀=8.85×10⁻¹² C²/N⋅m²
Set Up the Problem:
Since the σ are equal and opposite, this means that in the region outside of the two plates, the electric fields cancel each other out to zero: E = 0 The electric field between the plates is this strong:
E = σ/ε₀ = 30×10⁻⁶/8.85×10⁻¹² = 3.39x10⁶N/C
Possible variations between the positive plate and the negative plate include:
ΔV=Ed=3.39×10⁶ ×0.005=1.7×10⁴ V
Assuming the negatively charged plate is at the origin (d=0) and has no potential, the electric field is directed away from the positively charged plate and towards the negatively charged plate, the positive plate is at (d=+0.005 m) and have 1.7×10⁴ V
Solve the Problem:
V=0 for d<0
V=3.39×10⁶×d for 0≤d≤0.005 m
V=1.7×10⁴ V for d>0.005m
b. Identify the unknown:
when an electron leaves a state of rest at the negative plate and strikes the positive plate, how quickly it moves
List the Knowns:
Electron charge: e=1.6×10⁻¹⁹ C
Electron mass: m=9.11×10⁻³¹ kg
Set Up the Problem:
Potential and electric potential energy have the following relationships: = U/q
U=qV
To move the drop, this potential energy is converted to kinetic energy:
1/2mv²=qV
v = √2qV/m
Solve the Problem:
v = √(2×1.6×10⁻¹⁹×1.7×10⁴/9.11×10⁻³¹) = 7.73x10⁷ m/s
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a 60 kg k g person is in a head-on collision. the car's speed at impact is 15 m/s m / s . estimate the net force on the person if he or she is wearing a seat belt and if the air bag deploys. express your answer in newtons.
A collision occurs between two 60 kg people. At impact, the car was moving at a 15 m/s rate. The net force on the person if they are buckled in and the airbag deploys is 2.3*10³N.
A) Average force = ma
= m* v²/2s
= 60*15² /(2*1)
= 6750 N
In two significant Figure F = 6.8*10³ N
B) Average Force = ma = mv²/2s
= 60*15² /(2*0.005)
= 1350000 N
In two significant Figure F = 1.4*10⁶ N
C) Fnet/W =6750/(60*9.8) = 11
D) Fnet/W = 1350000/(60*9.8) = 2.3*10³ N
Force is a physical quantity that describes the interaction between two objects. It is defined as the push or pull that one object exerts on another object. Force is a vector quantity, meaning it has both magnitude and direction. The unit of force is Newton, which is defined as the amount of force required to accelerate a one-kilogram mass at a rate of one meter per second squared.
Forces can be categorized into different types, including contact forces such as friction and tension, and non-contact forces such as gravity and electromagnetism. The net force on an object determines its acceleration according to Newton's second law of motion, which states that the acceleration of an object is directly proportional to the net force applied and inversely proportional to its mass.
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