Questions from College Physics

Q: Explain why any net charge on a solid metal conductor in electrostatic

Explain why any net charge on a solid metal conductor in electrostatic equilibrium is found on the outside surface of the conductor instead of being distributed uniformly throughout the solid.

Q: A biologist is studying plant growth and wants to simulate a gravitational

A biologist is studying plant growth and wants to simulate a gravitational field twice as strong as Earth’s. She places the plants on a horizontal rotating table in her laboratory on...

Q: Explain why electric field lines begin on positive charges and end on

Explain why electric field lines begin on positive charges and end on negative charges. [Hint: What is the direction of the electric field near positive and negative charges?]

Q: A pendulum is made from a uniform rod of mass m1 and

A pendulum is made from a uniform rod of mass m1 and a small block of mass m2 attached at the lower end. (a) If the length of the pendulum is L and the oscillations are small, find the period of the...

Q: 1. An electron, passing close to a target nucleus,

1. An electron, passing close to a target nucleus, slows and radiates away some of its energy. What is this process called? (a) Compton effect (b) photoelectric effect (c) bremsstrahlung (d) blackbody...

Q: Two speakers spaced a distance 1.5 m apart emit coherent

Two speakers spaced a distance 1.5 m apart emit coherent sound waves at a frequency of 680 Hz in all directions. The waves start out in phase with each other. A listener walks in a circle of radius gr...

Q: A circuit has a resistor and an unknown component in series with

A circuit has a resistor and an unknown component in series with a 12 V (rms) sinusoidal ac source. The current in the circuit decreases by 20% when the frequency decreases from 240 Hz to 160 Hz. What...

Q: What is the mass of one gold atom in kilograms?

What is the mass of one gold atom in kilograms?

Q: In the figure, switch S is initially open. It is

In the figure, switch S is initially open. It is closed, and then opened again a few seconds later. (a) In what direction does current flow through the ammeter when switch S is closed? (b) In what d...

Q: A bicycle and its rider together have a mass of 75 kg

A bicycle and its rider together have a mass of 75 kg. What power output of the rider is required to maintain a constant speed of 4.0 m/s (about 9 mi/h) up a 5.0% grade (a road that rises 5.0 m for ev...