Questions from College Physics

Q: Beatrice needs to drag her suitcase again (see Example 3.

Beatrice needs to drag her suitcase again (see Example 3.8). This time she pulls with a force of 105 N at 38.0° with the horizontal. The coefficients of static and kinetic friction between the suitcas...

Q: The bottom of a thundercloud is at a potential of −1

The bottom of a thundercloud is at a potential of −1.00 × 108 V with respect to Earth's surface. If a charge of −25.0 C is transferred to Earth during a lightning strike, find the electric potential e...

Q: Consider a 60.0 W incandescent lightbulb and a 100.

Consider a 60.0 W incandescent lightbulb and a 100.0 W incandescent lightbulb designed for use in a household lamp socket at 120 V. (a) What are the resistances of these two bulbs? (b) If they are w...

Q: A string of 25 decorative lights has bulbs rated at 9.

A string of 25 decorative lights has bulbs rated at 9.0 W, and the bulbs are connected in parallel. The string is connected to a 120 V power supply. (a) What is the resistance of each of these lights...

Q: An astronaut of mass 60.0 kg and a small asteroid

An astronaut of mass 60.0 kg and a small asteroid of mass 40.0 kg are initially at rest with respect to the space station. The astronaut pushes the asteroid with a constant force of magnitude 250 N fo...

Q: How far along the incline does the object travel before coming to

How far along the incline does the object travel before coming to rest and then sliding back down?

Q: Tarzan is running toward a deep gully. A tree branch with

Tarzan is running toward a deep gully. A tree branch with a vine hangs over the gully. Tarzan must grab the vine and swing across the gully to the other side, where the ground surface is 1.7 m higher....

Q: A toroid is like a solenoid that has been bent around in

A toroid is like a solenoid that has been bent around in a circle until its ends meet. The field lines are circular, as shown in the figure. What is the magnitude of the magnetic field inside a toroid...

Q: Why is the receiving antenna of a satellite dish placed at a

Why is the receiving antenna of a satellite dish placed at a set distance from the dish?

Q: Jane is running from the ivory hunters in the jungle. Cheetah

Jane is running from the ivory hunters in the jungle. Cheetah throws a 7.0 m long vine toward her. Jane leaps onto the vine with a speed of 4.0 m/s. When she catches the vine, it makes an angle of 20°...