Answer:
velocity= 68.58m/s
Explanation:
formula: v = initial velocity + (acceleration)(time)
plug in your values: v= 18m/s + (1.8 m/s2)(28.1s)
solve the parenthesis first: v = 18 m/s + 58.58m/s
add: v = 68.58 m/s
Henrietta is going off to her physics class, jogging down the sidewalk at a speed of 4.15 m/s . Her husband Bruce suddenly realizes that she left in such a hurry that she forgot her lunch of bagels, so he runs to the window of their apartment, which is a height 44.4 m above the street level and directly above the sidewalk, to throw them to her. Bruce throws them horizontally at a time 8.00 s after Henrietta has passed below the window, and she catches them on the run. You can ignore air resistance.
Required:
a. With what initial speed must Bruce throw the bagels so Henrietta can catch them just before they hit the ground?
b. Where is Henrietta when she catches the bagels?
Answer:
a 15.22 m/s
b 45.65 m
Explanation:
Using the same formula,
x = vt, where
x is now 45.65, and
t is 3 s, then
45.65 = 3v
v = 45.65/3
v = 15.22 m/s
See the attachment for the part b. We used the distance gotten in part B, to find question A
The ossicles (the three tiny bones in the middle ear) are responsible for __________.
A.
converting sound vibrations into neural signals
B.
relaying sound vibrations to the eardrum
C.
vibrating in response to sound waves
D.
amplifying sound vibrations from the eardrum
Answer:
D.amplifying sound vibrations from the eardrum
this is correct
Answer:
D.amplifying sound vibrations from the eardrum
Explanation:
right on edge
In a tug-of-war game on one campus, 15 students pull on a rope at both ends in an effort to displace the central knot to one side or the other. Two students pull with force 190 N each to the right, four students pull with force 92 N each to the left, five students pull with force 64 N each to the left, three students pull with force 158 N each to the right, and one student pulls with force 260 N to the left. Assuming the positive direction to the right, express the net pull on the knot in terms of the unit vector. How big is the net pull on the knot? In what direction?
Answer:
94N to the left
Explanation:
Net force will be the net pull on the knot
Net force = Sum of Direction of force towards the right - Sum of Direction of force towards the left.
For direction of force towards the right:
Two students pull with force 190 N = 2(190) = 380N
Three students pull with force 158 N each to the right = 3(158) = 474N
Total sum of force towards the right = 380N+474N = 854N
For direction of force towards the left:
four students pull with force 92 N each to the left = 4(92) = 368N
Five students pull with force 64 N each to the left = 5(64) = 320N
One student pulls with force 260 N to the left = 1(260) = 260N
Total sun for forces towards the left = 368N+320N+260N = 948N
Net force = 854N - 948N
Net force = -94N
Hence the net pull on the knot is -94N
The net pull on the knot is 94N (Its magnitude) to the left (due to the negative value we arrived at)
When can thermal energy in a system move from lower to higher temperatures?
Answer:
When the object in creases or decreases in temperature.
Explanation:
Heat flow moves energy from a higher temperature to a lower temperature. The bigger the difference in temperature between two objects, the faster heat flows between them. When temperatures are the same there is no change in energy due to heat flow. Radiation and Conduction are the two methods of heat transfer..
Can you help me with this question?
Verse 16:
A particle oscillates harmonically on the axis
. The graph below shows a fraction of the particle's displacement over time. Which of the following is the maximum velocity of the particle closest to?
The maximum velocity is vmax = ωA = (2π)(0.04) = 0.08π units/s.
In order to find the maximum velocity of a particle oscillating harmonically on the axis, we must use the relationship between velocity and displacement. The graph of the particle's displacement over time can help us find this relationship.Verse 16: This verse contains the necessary information to answer the question. The graph shows the displacement of the particle over time, with the highest point being 0.04 units and the lowest point being -0.04 units. From this, we know that the amplitude of the oscillation is 0.04 units.To find the maximum velocity, we can use the formula:v = ωAcos(ωt + φ), where: v = velocity, ω = angular frequency, A = amplitude, cos = cosine function, t = time, φ = phase angleSince we are looking for the maximum velocity, we need to find when the cosine function is at its maximum. This occurs when cos(ωt + φ) = 1. Therefore, the maximum velocity is given by:vmax = ωAAt maximum displacement, the velocity is zero. Therefore, we need to find the angular frequency, which is given by:ω = 2πf, where f is the frequency. From the graph, we can see that one complete cycle takes 1 second. Therefore, the frequency is: f = 1 cycle/1 sec = 1 HzTherefore,ω = 2πf = 2π(1) = 2π rad/sNow we can find the maximum velocity: vmax = ωA = (2π)(0.04) = 0.08π units/sSummary: To find the maximum velocity of a particle oscillating harmonically on the axis, we can use the relationship between velocity and displacement. The graph of the particle's displacement over time can help us find this relationship. The formula v = ωAcos(ωt + φ) is used to find the maximum velocity, which occurs when the cosine function is at its maximum.The maximum velocity is given by vmax = ωA. From the graph, we know that the amplitude of the oscillation is 0.04 units and that one complete cycle takes 1 second. Therefore, the maximum velocity is vmax = ωA = (2π)(0.04) = 0.08π units/s.For more questions on maximum velocity
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How can we show that air can do work?
Air can do work when it exerts a force on an object and causes it to undergo displacement. The ability of air to do work is evident in various phenomena, such as wind pushing sails, fans moving objects, and air pressure powering pneumatic systems.
Air can do work through its ability to exert a force over a distance. Work is defined as the transfer of energy that occurs when a force is applied to an object and it undergoes displacement in the direction of the force. When air is in motion, it possesses kinetic energy and can exert a force on objects in its path, thus performing work.
To understand how air can do work, we can consider the example of a moving fan. When a fan is turned on, the blades start to rotate, creating a flow of air. As the air moves, it carries kinetic energy. When the moving air encounters an object, such as a piece of paper, the air molecules collide with the paper's surface and exert a force on it. This force causes the paper to move and displaces it from its initial position.
The work done by the air can be calculated using the equation:
Work = Force * Distance * cos(θ)
Where Force is the magnitude of the force exerted by the air, Distance is the displacement of the object, and θ is the angle between the direction of the force and the displacement.
In the case of air doing work on an object, the force exerted by the air is perpendicular to the direction of motion, resulting in θ = 90 degrees. Since cos(90) = 0, the equation simplifies to:
Work = Force * Distance * 0
Therefore, the work done by the air on the object is zero when the force exerted by the air is perpendicular to the displacement.
However, if the force exerted by the air is not perpendicular to the displacement, such as when blowing air at an angle to move an object, then work is performed. The air exerts a force on the object and causes it to move in the direction of the force, resulting in the transfer of energy.
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Jacob is a white male who has lived in an economically depressed area for his entire life. His mother had him when she was very young, so he lives with her, his grandmother, his uncle, and his little sister in a small appointment. There is not a lot of space, so it is hard for Jacob to concentrate on homework and often he doesn’t do it. Is Jacob at risk for dropping out of high school?
A.
Yes. Jacob’s background suggests a lot of risk factors.
B.
Yes. It is clear that Jacob thinks he can succeed without school.
C.
No. Race is the most important factor in determining which students drop out.
D.
No. Jacob just needs to find a place where he can focus and complete his work.
The environmental and familial challenges he faces indicate an increased risk of dropping out. Yes. Jacob's background suggests a lot of risk factors is the most accurate response. Here option A is the correct answer.
Jacob's situation presents several risk factors that could increase his likelihood of dropping out of high school. First, living in an economically depressed area can limit access to quality educational resources and opportunities, making it harder for Jacob to thrive academically. The lack of space in his small apartment further compounds the problem, as it becomes challenging for him to concentrate on his homework. The absence of a conducive environment for studying can negatively impact his motivation and ability to complete assignments consistently.
Moreover, Jacob's family dynamics may also contribute to his risk of dropping out. Being raised by a young mother, living with his grandmother, uncle, and little sister in a crowded space could imply limited financial resources and potential disruptions at home. These factors may increase stress levels and make it more difficult for Jacob to prioritize his education and engage in school-related activities effectively.
While race and ethnicity can influence educational outcomes, it is essential to consider the specific circumstances and individual factors in Jacob's life rather than assuming that race alone is the most important determinant.
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give four example of fluid statics
Answer:
See the explanation below
Explanation:
First example
The water contained in a lake or tank is in equilibrium there is no movement of the fluid and the water exerts pressure on the bottom of the tank or lake.
Second example
A floating buoy that is on the high seas, the buoy is in static equilibrium and these developed forces allow the buoy not to sink.
Third example
A hydraulic press which uses the principle of pascal and the mechanical advantage due to the relation of areas, where applying a smaller force, you can obtain a much greater force, communicating the energy through a fluid such as oil.
Fourth Example
The atmospheric pressure, which depends on the height of a place above sea level, in this case the fluid is the air. Although the air cannot be seen, it exerts a pressure column on the bodies on the Earth's surface.
Which statement is the contrapositive of:
If two angles are vertical angles, then they are not adjacent angles.
A.If two angles are not adjacent angles, then they are vertical angles.
B.If two angles are not vertical angles, then they are adjacent angles.
C.If two angles are not vertical angles, then they are not adjacent angles.
D.If two angles are adjacent angles, then they are not vertical angles.
E.Two angles are vertical angles if, and only if, they are not adjacent angles.
Answer:
E.two angles are vertical angles if, and only if they are not adjacent angles
If a ball is given an acceleration of 3.0 meters/second while be pushed with a force of 0.75 Newton’s, what is the mass of the ball?
Answer:
The answer is 0.25 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
We have
[tex]m = \frac{0.75}{3} \\ [/tex]
We have the final answer as
0.25 kgHope this helps you
When the automobile moves away from the listener, its horn seems
a. Low pitched (low frequency) b. High Pitched (high frequency)
c. Normal (no change in frequency)
Answer:
The exact opposite of the other question! This one's Low pitched (a)
Explanation:
See the explanation for the other question xD
True or false. cones are sensitive to bright light.
Answer:
false
Explanation:
they r not as sensitive as the rods
which of the following is a characteristic of tennis
What is motion physics
Answer:
B) A change in the position of an object with respect to a reference pointExplanation:
Motion, in physics, change with time of the position or orientation of a body. Motion along a line or a curve is called translation.pLEASE HURRY !!! ILL GIVE BRAINLIEST!!!!!!!!!!!!!
Four kilograms of carbon monoxide (CO) is contained in a rigid tank with a volume of 1 m^3. The tank is fitted with a paddle wheel that transfers energy to the CO at a constant rate of 14 W for 1 h. During the process, the specific internal energy of the carbon monoxide increases by 10 kJ/kg. If no overall changes in kinetic and potential energy occur,
determine:
a. the specific volume at the final state;
b. the energy transfer by work;
c. the energy transfer by heat transfer, and the direction of the heat transfer.
Answer:
(a). The specific volume at the final state is 0.25 m³/kg.
(b). The energy transfer by work is 50.4 kJ.
(c). The energy transfer by heat is -10.4 kJ.
Negative sign shows the direction of heat
Explanation:
Given that,
Weight of carbon monoxide = 4 kg
Volume of tank = 1 m³
Constant rate of 14W for 1 hour
The specific internal energy of the carbon monoxide increases by 10 kJ/kg.
(a). We need to calculate the specific volume at the final state
Using formula of specific volume
[tex]V'=\dfrac{V}{m}[/tex]
Put the value into the formula
[tex]V'=\dfrac{1}{4}[/tex]
[tex]V'=0.25\ m^3/kg[/tex]
(b). We need to calculate the energy transfer by work
Using formula of work
[tex]W=Pt[/tex]
Where, P = power
t = time
Put the value into the formula
[tex]W=14\times1\times3600[/tex]
[tex]W=50.4\ kJ[/tex]
(c). The energy transfer by heat transfer, and the direction of the heat transfer
We need to calculate the [tex]\Delta U[/tex]
Using formula of internal energy
[tex]\Delta U=m\Delta u[/tex]
Put the value into the formula
[tex]\Delta U=4\times10[/tex]
[tex]\Delta U=40\ kJ[/tex]
We need to calculate the energy transfer by heat
Using formula of energy transfer
[tex]Q=\Delta U-W[/tex]
Put the value into the formula
[tex]Q=40-50.4[/tex]
[tex]Q=-10.4\ kJ[/tex]
Negative sign shows the direction of heat that is removed from CO.
Hence, (a). The specific volume at the final state is 0.25 m³/kg.
(b). The energy transfer by work is 50.4 kJ.
(c). The energy transfer by heat is -10.4 kJ.
Negative sign shows the direction of heat.
Gases have a definite shape and volume. O A. True O B. False
Answer:
FALSE
Explanation:
Select the correct answer from each drop-down menu. Danica observes a collision between two vehicles. She sees a large truck driving down the road. It strikes a small car parked at the side of the road. Complete the passage summarizing the collision. On colliding, the truck applies a force on the stationary car, and the stationary car applies and opposite force on the truck. The front of the truck is designed to crumple in order to , which protects the well-being of the passengers.
On colliding, the truck applies a force on the stationary car, and the stationary car applies an opposite force on the truck. The front of the truck is designed to crumple in order to absorb the impact of the collision, which protects the well-being of the passengers.
A car is traveling at 114 m/s and changes its velocity to 77 m/s in 9 sec.
What is the car's acceleration?
Answer:
Given -
Initial Velocity, u = 114 m/sFinal velocity, v = 77 m/s.Time taken, t = 9 sec.To find -
Acceleration of the car.Solution -
Here, using the equation of motion v = u + at we can find the acceleration easily.
★ Here,
V = Final velocityU = Initial VelocityA = AccelerationT = Time.Substituting the values -
→ 77 = 114 + a(9)
→ 9a = 114 - 77
→ 9a = 37
→ a = 37/9
→ a = 4.1 m/s
Therefore, the acceleration of the car will be 4.1 m/s.
A ball is thrown up with a speed of 30 m/s and caught when it comes back down. You can ignore air resistance.
Where will the ball's instantaneous VELOCITY be 0 m/s?
A. At the top of its path
B. Just before it is caught at the end of it's path
C. Half way to the top of it's path
D. Just after leaving the throwers hand
Answer:
The answer is B have a great day hope I helped
Question Completion Status:
A Moving to the next question prevents changes to this answer.
Question 5
A ball gets pushed off a 1.2m high table with a horizontal speed of 9m/s. How far does the ball travel horizontally before hitting the ground?
Answer:
The ball will travel 4.45 m horizontally before hitting the ground
Explanation:
Horizontal Motion
When an object is launched horizontally with a speed v from a height h, the maximum horizontal distance traveled by the object, also called range can be calculated as follows:
[tex]\displaystyle d=v\cdot\sqrt{\frac {2h}{g}}[/tex]
The question provides us with the following data:
Initial speed of the ball: vo=9 m/s
Height: h=1.2
Proceed to calculate the range:
[tex]\displaystyle d=9\ m/s\cdot\sqrt{\frac {2\cdot 1.2\ m}{9.8\ m/s^2}}[/tex]
Calculating:
[tex]\displaystyle d=9\ m/s\cdot\sqrt{0.2449\ s^2}[/tex]
[tex]d=9\ m/s\cdot 0.4949\ s[/tex]
d=4.45 m
The ball will travel 4.45 m horizontally before hitting the ground
Which part of the brain is responsible for laying down new memories
Answer:
The Answer is hippocampus.Explanation:
I hoped it's helpful to you . mark this answer as BRAINLIEST answer. Thank you ☺️Which has more energy, a photon of ultraviolet radiation or a photon of yellow light?
Answer:
The ultraviolet light has more energy
Explanation:
18. A cup contains hot liquid. Some of the liquid evaporates.
What happens to the mass and what happens to the weight of the liquid in the cup?
(1 Point)
Mass Weight
A decreases decreases
B decreases stays the same
C stays the same decreases
D stays the same stays the same
What is SeaWorld?
What is this
What is that
SeaWorld is a chain of theme parks and oceanariums that showcase marine life through educational exhibits, live shows, and thrilling rides. While it has faced criticism for its treatment of animals, SeaWorld has made changes to prioritize conservation and phased out its orca breeding program.
SeaWorld is a chain of theme parks and oceanariums that primarily focuses on marine life and entertainment. The company operates various parks across the United States, including SeaWorld parks in Orlando, San Diego, and San Antonio, as well as Busch Gardens parks in Tampa and Williamsburg. SeaWorld offers a combination of educational exhibits, live shows, and thrilling rides, with a special emphasis on marine animals such as dolphins, whales, sea lions, penguins, and sharks.
SeaWorld parks provide visitors with opportunities to observe and interact with marine creatures up close, while also offering educational programs that aim to raise awareness about marine conservation and preservation. The parks feature captivating shows featuring trained animals, where they perform impressive behaviors and stunts, showcasing their intelligence and natural abilities.
Over the years, SeaWorld has faced criticism from animal rights activists and environmentalists, who argue that the captivity and use of marine animals for entertainment purposes is unethical and harmful to the animals' well-being. These concerns have led to significant changes in the company's practices, including the phasing out of its orca breeding program and the introduction of more educational and conservation-focused initiatives.
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Three vectors with magnitudes 120N, 100N and 80N are given in the diagram below. Write them using the unit vectors i, j and k. . 100N 80N 53° 40° Y 37° 120N X Trigonometric values you may use Cos37⁰ = 0.8 = sin53° sin37° 0.6 = cos53° cos40° = 0.766, sin40° = 0.643
The vectors can be expressed using unit vectors as follows:
Vector A = 96N i + 96N j + 0N k
Vector B = 76.6N i + 64.3N j + 0N k
Vector C = 64N i + 48N j + 0N k.
In the given diagram, let's consider the vectors as follows:
Vector A with magnitude 120N, Vector B with magnitude 100N, and Vector C with magnitude 80N.
To express these vectors using unit vectors i, j, and k, we need to determine their respective components in the x, y, and z directions.
For Vector A (120N), we have the following information:
Magnitude = 120N
Direction: X-axis (cosine component) with an angle of 37° and Y-axis (sine component) with an angle of 53°.
Using the trigonometric values provided:
cos37° = 0.8 and sin53° = 0.8
Therefore, the components of Vector A are:
Ax = 120N * 0.8 = 96N (in the X-direction)
Ay = 120N * 0.8 = 96N (in the Y-direction)
Az = 0N (no component in the Z-direction)
Thus, Vector A can be written as 96N i + 96N j + 0N k.
Similarly, using the trigonometric values for Vector B and Vector C, we can calculate their components:
For Vector B (100N):
Bx = 100N * cos40° = 100N * 0.766 = 76.6N
By = 100N * sin40° = 100N * 0.643 = 64.3N
Bz = 0N
Vector B can be expressed as 76.6N i + 64.3N j + 0N k.
For Vector C (80N):
Cx = 80N * cos37° = 80N * 0.8 = 64N
Cy = 80N * sin37° = 80N * 0.6 = 48N
Cz = 0N
Vector C can be written as 64N i + 48N j + 0N k.
In summary, the vectors can be expressed using unit vectors as follows:
Vector A = 96N i + 96N j + 0N k
Vector B = 76.6N i + 64.3N j + 0N k
Vector C = 64N i + 48N j + 0N k.
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23. Two states of matter are described as follows.
In state 1. the molecules are very far apart. They move about very quickly at random in straight lines
they hit something.
until
In state 2, the molecules are quite closely packed together. They move about at random. They do not have
fixed positions
What is state 1 and what is state 2?*
(1 Point)
State 1 state 2
A solid liquid
B gas solid
Cliquid gas
D gas liquid
Answer:
D gas liquid
Explanation:
The states of matter in 1 and 2 are the gas and liquid phases.
State 1; the molecules are very far apart. They move about quickly at random straight lines.
This is an attribute of a gas. The particles or molecules of gases are very far apart. They are held together by very weak attractive forces. Gases are compressibleExamples are carbon(iv) oxide, oxygen gasState 2: the molecules are quite closely packed together. They move about at random. They do not have fixed positions.
Liquids are held by much stronger attractive forces. Their molecules are closer to each other. They generally flowThey are partially compressible.Solids are the most closely held together by very strong attractive forces. Their molecules have fixed position.
Therefore, State 1 is gas and State 2 is liquid.
Lab Report
Light
It’s time to complete your Lab Report. Save the lab to your computer with the correct unit number, lab name, and your name at the end of the file name (e.g., U4_ Lab_Light_Alice_Jones.doc).
Introduction
1. What was the purpose of the experiment?
Type your answer here:
2. What were the independent, dependent, and control variables in your investigation? Describe the variables for each part of the experiment.
Type your answer here:
Experimental Methods
1. What tools did you use to collect your data?
Type your answer here:
2. Describe the procedure that you followed to collect your data.
Type your answer here:
Data and Observations
1. Record your observations in the data tables.
Type your answer here:
Table 1. Angles of Incidence and Angles of Reflection for a Beam of Light Reflected off a Mirror
Angle of incidence (°) Angle of reflection (°)
Table 2. Angles of Incidence and Angles of Refraction for a Beam of Light Refracted through a Glass Lens
Angle of incidence (°) Angle of refraction (°)
Conclusions
1. Draw a diagram (develop a model) that shows what happens to light when it reflects off a mirror. Look for patterns in your data to help you develop your model. Hint: Is the angle of reflection always greater than, less than, or equal to the angle of incidence? Include labels.
Type your answer here:
2. Use your model to predict the angle of reflection of a beam of light reflected off a mirror if the angle of incidence of the beam of light is 40 degrees.
Type your answer here:
3. Draw a diagram (develop a model) that shows what happens to light when it is refracted through a glass lens. Look for patterns in your data to help you develop your model. Hint: Is the angle of refraction always greater than, less than, or equal to the angle of incidence? Include labels.
Type your answer here:
Answer:
Explanation:
the answer is b
1. Which object would have more inertia — a 1,000 kg car or a 150 kg golf cart?
Answer:a car with 1,000kg
Explanation: A car with a mass of 1,000kg has more inertia than 150 kg
Out of the two objects a 1000-kilogram car and a 150-kilogram golf cart, the 1000-kilogram cart will have more inertia as the inertia of any object is directly proportional to its mass.
What is Newton's first law?According to Newton's first law, until pushed to alter its condition by the intervention of an external force, every object will continue to be at rest or in uniform motion along a single direction.
The larger the mass of the object, the greater would be the inertia of the object.
Thus, a 1000-kilogram automobile will have higher inertia than a 150-kilogram golf cart since any object's inertia is directly proportionate to its mass.
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an inductive argument can be strong without being cogent
True
False
Answer:
False
Explanation:
Google said
If an inductive argument is strong, then it must also be cogent.
