Questions from College Physics

Q: A glass tube is closed at one end and has a diaphragm

A glass tube is closed at one end and has a diaphragm covering the other end. The tube is filled with gas and some very fine sawdust has been scattered along inside the tube. When the diaphragm is dri...

Q: A slide projector forms a real image of the slide on a

A slide projector forms a real image of the slide on a screen using a converging lens. If the bottom half of the lens is blocked by covering it with opaque tape, does the bottom half of the image disa...

Q: Explain, using Huygens's principle, why the Poisson spot is expected

Explain, using Huygens's principle, why the Poisson spot is expected.

Q: What effect places a lower limit on the size of an object

What effect places a lower limit on the size of an object that can be clearly seen with the best optical microscope?

Q: You want to build a cyclotron to accelerate protons to a speed

You want to build a cyclotron to accelerate protons to a speed of 3.0 × 107 m/s for use in proton beam therapy. The largest magnetic field you can attain is 1.5 T. What must be the minimum radius of t...

Q: Three identical incandescent lightbulbs are connected with wires to an ideal battery

Three identical incandescent lightbulbs are connected with wires to an ideal battery. The two terminals on each socket connect to the two terminals of its lightbulb. Wires do not connect with one anot...

Q: A violin is tuned by adjusting the tension in the strings.

A violin is tuned by adjusting the tension in the strings. Brian's A string is tuned to a slightly lower frequency than Jennifer's, which is correctly tuned to 440.0 Hz. (a) What is the frequency of...

Q: In order to decrease the fundamental frequency of a guitar string by

In order to decrease the fundamental frequency of a guitar string by 4.0%, by what percentage should you reduce the tension?

Q: A uniform magnetic field directed upward exists in some region of space

A uniform magnetic field directed upward exists in some region of space. In what direction(s) could an electron be moving if its trajectory is (a) a straight line? (b) a circle? Assume that the elec...

Q: An RLC series circuit is built with a variable capacitor. How

An RLC series circuit is built with a variable capacitor. How does the resonant frequency of the circuit change when the area of the capacitor is increased by a factor of 2?