Questions from College Physics

Q: Your laboratory partner hands you a glass rod and asks if it

Your laboratory partner hands you a glass rod and asks if it has negative charge on it. There is an electroscope in the laboratory. How can you tell if the rod is charged? Can you determine the sign o...

Q: A lightweight plastic rod is rubbed with a piece of fur.

A lightweight plastic rod is rubbed with a piece of fur. A second plastic rod, hanging from a string, is attracted to the first rod and swings toward it. When the second rod touches the first, it is s...

Q: In her bathroom, Mindy has an overhead heater that consists of

In her bathroom, Mindy has an overhead heater that consists of a coiled wire made of nichrome that gets hot when turned on. The wire has a length of 3.0 m when it is uncoiled. The heating element is a...

Q: Suppose that a horizontal electron beam is deflected to the right by

Suppose that a horizontal electron beam is deflected to the right by a uniform magnetic field. What is the direction of the magnetic field? If there is more than one possibility, what can you say abou...

Q: A small plane is flying directly west with an airspeed of 30

A small plane is flying directly west with an airspeed of 30.0 m/s. The plane flies into a region where the wind is blowing at 10.0 m/s at an angle of 30° to the south of west. In that region, the pil...

Q: An object of mass 3.0 kg is allowed to fall

An object of mass 3.0 kg is allowed to fall from rest under the force of gravity for 3.4 s. What is the change in its momentum? Ignore air resistance.

Q: A chain pulls tangentially on a 40.6 kg uniform cylindrical

A chain pulls tangentially on a 40.6 kg uniform cylindrical gear with a tension of 72.5 N. The chain is attached along the outside radius of the gear at 0.650 m from the axis of rotation. Starting fro...

Q: Photoelectric experiments are performed with five different metals. Given the work

Photoelectric experiments are performed with five different metals. Given the work function of the metal ϕ and the energy of the incident photons E, rank the experiments in order of the stopping poten...

Q: The pilot of a small plane finds that the airport where he

The pilot of a small plane finds that the airport where he intended to land is fogged in. He flies 55 mi west to another airport to find that conditions there are too icy for him to land. He flies 25...

Q: (a) How much energy is stored in the inductor at

(a) How much energy is stored in the inductor at t = 0? (b) What is the instantaneous rate of change of the inductor’s energy at t = 0? (c) What is the average rate of change of the inductor’s energy...