Questions from College Physics

Q: Explain how a plane mirror can be thought of as a special

Explain how a plane mirror can be thought of as a special case of a spherical mirror. What is the focal length of a plane mirror? Does the spherical mirror equation work for plane mirrors with this ch...

Q: Consider the fusion reaction of a proton and a deuteron:

Consider the fusion reaction of a proton and a deuteron: / . (a) Identify the reaction product X. (b) The binding energy of the deuteron is about 1.1 MeV per nucleon and the binding energy of “X” i...

Q: A crate is sliding down a frictionless ramp that is inclined at

A crate is sliding down a frictionless ramp that is inclined at 35.0°. (a) If the crate is released from rest, how far does it travel down the incline in 2.50 s if it does not get to the bottom of the...

Q: Some low-cost voice recorders do not have a separate microphone

Some low-cost voice recorders do not have a separate microphone. Instead, the speaker is used as a microphone when recording. Explain how this works.

Q: When using a certain grating, third-order violet light of

When using a certain grating, third-order violet light of wavelength 420 nm falls at the same angle as second-order light of a different wavelength. What is that wavelength?

Q: If the initial speed is 6.0 m/s and

If the initial speed is 6.0 m/s and the vertical drop is 18.0 m, find the final speeds of the three rocks.

Q: In the movie The Matrix, humans are used to generate electricity

In the movie The Matrix, humans are used to generate electricity. Estimate the total amount of stored electrical energy in the brain's 1011 nerve cells. Assume that the average nerve cell has a membra...

Q: Show that the cutoff frequency for an x-ray tube is

Show that the cutoff frequency for an x-ray tube is proportional to the potential difference through which the electrons are accelerated.

Q: Questions 11–20. See the graph of vx(t

Questions 11–20. See the graph of vx(t) for an object in SHM. Answer choices for each question: (a) 1 s, 2 s, 3 s (b) 5 s, 6 s, 7 s (c) 0 s, 1 s, 7 s, 8 s (d) 3 s, 4 s, 5 s (e) 0 s,...

Q: The primary coil of a transformer has 250 turns; the secondary

The primary coil of a transformer has 250 turns; the secondary coil has 1000 turns. An alternating current is sent through the primary coil. The emf in the primary is of amplitude 16 V. What is the em...