08/29/20

Four identical metal spheres have charges of qA = -8.0 μC, qB=-2.0 μC, qC=+5.0 μC, and qD=+12.0 μC.
Four identical metal spheres have charges of qA = -8.0 μC, qB=-2.0 μC, qC=+5.0 μC, and qD=+12.0 μC.(a) Two of the spheres are brought together so they touch, and then they are separated. Which... more
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08/09/20

Inclined plane physics problem
A sphere with mass m is put on top of an inclined plane with height h. In the first case the sphere is moving downwards without friction, and in the second case with very little friction. Find the... more
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07/25/20

Tom at a beach sees an anchored fishing boat rise and fall 3.5 m once every 4.0 s as wave crests 25 m apart pass through

Tom at a beach sees an anchored fishing boat rise and fall 4.5 m once every 5.0 s as wave crests 25 m apart pass through it(a) Calculate the frequency of the waves. (b) Calculate the speed of... more
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07/25/20

Monochromatic light has a wavelength of 2.85 × 10^7 m in air and 5.22 × 10^7 m in clear liquid. If the ray of such light enters a clear liquid pool at an angle of incidence of 30.0°..
Monochromatic light has a wavelength of 2.85 × 10^7 m in air and 5.22 × 10^7 m in clear liquid. If the ray of such light enters a clear liquid pool at an angle of incidence of 30.0°, what is the... more
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07/22/20

A 1.5 × 103 kg vehicle on a level road accelerates from rest to 15.0 m/s in 6.00 s. Determine the output of power in the car in this 6.00 s. Ignore friction.

A 1.5 × 103 kg vehicle on a level road accelerates from rest to 15.0 m/s in 6.00 s. Determine the output of power in the car in this 6.00 s. Ignore friction.
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07/22/20

A student climbs a hill from an elevation of 250 m to an elevation of 490 m. In doing so he expends 2.8 x 105J. The student’s mass is 75 kg. What is his climbing efficiency?
A student climbs a hill from an elevation of 250 m to an elevation of 490 m. In doing so he expends 2.8 x 105J. The student’s mass is 75 kg. What is his climbing efficiency?
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07/20/20

refraction of light

Light travels from a region of fused quartz into a region of whale oil making an angle of incidence of 30 degrees. Which of the following best describes the path of the light as it moves into... more
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07/13/20

needing help with these old physics questions
1. A man standing at a railway crossing notices that the frequency of a horn of an incoming train increases when the train is coming towards him. The actual frequency of the horn doesn't... more
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06/30/20

I have a physics question.
I have a massless and frictionless string attached to 2 balls on each end. The 2 balls may have different masses. There is also a pivot in the middle of the string, such that the string can slide... more
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06/26/20

b. If the density of air is 1.28 kg/m3 and the end of the pipe on the right opens up to the atmosphere, what is the pressure of the pipe at the 2.00 cm diameter section?

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06/23/20

Period and amplitude dependence for a pendulum?
Does the period of a pendulum depend on amplitude?a) Yesb) Noc) It depends, for small amplitudes, no, but for large amplitudes, yes (to within fractions of a second)d) It depends, for small... more
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06/23/20

A 5000-Hz tone must have what sound level to seem as loud as a 50-Hz tone that has a 78-dB sound level?
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06/22/20

please answer :
Two parallel wires, 4 cm apart, carry currents of 2 A and 4 A respectively, in the samedirection. The force per unit length in N/m of one wire on the other is:
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06/20/20

i need a solution please

A 1200 kg package is being moved on the floor of a plant at a speed of 10 m/s underthe action of a horizontal force F (figure 2). Suddenly an additional force of 1000N is applied to the package to... more
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06/08/20

A 150 kg bumper car accelerates uniformly from rest to 5 m/s in 4 seconds. What is the total work done on the car, in joules? Report your answer to 1 decimal place.
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06/05/20

Falling objects drop with an average acceleration of 9.8 m/s2. If an object falls from a tall building, how long will it take before it reaches a speed of 63.7 m/s?

a = vf – vi vf = vi + at t = vf-vi           t     a   My teacher gave me these formulas and im not sure which one it is or even how to... more
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05/27/20

physics question
A high school football team practices on a field that is 73.152 m long 30.1752 m wide. Calculate the area of the field, and write the answer with the correct number of significant figures.Select one:
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05/20/20

Describe how the graph of the function is related to the graph f(x)=x^2. f(x)=x^2+8.
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05/20/20

algebra question
To go to a beach party 600 yd away, you kayak against the ocean current for 2 h. The trip back takes 1 h. Write and solve a system of equations to find your paddling speed, x, in still water. Find... more
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05/20/20

This question has to do with speed and sound
Jimmy wakes up late for school. Fortunately, his house is near to the school property, so he doesn’t have far to go. In fact, his bedroom window is exactly 260 m from the wall of the school gym. As... more
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05/19/20

Newtons Second Law True or False Questions
1. Indicate which statement is true(T) or false(F)? If false then change the word or phrase that is bold and underlined to make it true._____ A child sits on a toboggan and slides down a hill with... more
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05/13/20

Which of the three approaches would be expected to produce the largest error. Explain why.

The procedures are: Single Slit Diffraction Double Slit Diffraction Diffraction Grating This is for when taking measurements of deltaX
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05/13/20

Electromagnetic Waves & Wave Energy
X-rays are electromagnetic waves that can penetrate skin, but not bone. In hospitals, X-rays are used to produce images of bones. How do X-rays compare to visible light? A. X-rays have a higher... more
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05/04/20

Optical Instruments
A nearsighted eye is corrected by placing a diverging lens in front of the eye. The lens will create a virtual image of a distant object at the far point (the farthest an object can be and still be... more
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04/28/20

Physics Force Question
A student exerts a force of 72.0 N along the handle of a 196 N lawn mower to push it across the lawn at an angle of 39° with the horizontal. Determine the normal force given to the lawn mower by... more
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