Questions from College Physics

Q: A pendulum clock has a period of 0.650 s on

A pendulum clock has a period of 0.650 s on Earth. It is taken to another planet and found to have a period of 0.862 s. The change in the pendulum’s length is negligible. (a) Is the gravitational fie...

Q: Water enters an apartment building 0.90 m below the street

Water enters an apartment building 0.90 m below the street level with a gauge pressure of 52.0 kPa through the main pipe, which has a 5.00 cm radius. A second-story bathroom has an open faucet with a...

Q: A grandfather clock is constructed so that it has a simple pendulum

A grandfather clock is constructed so that it has a simple pendulum that swings from one side to the other, a distance of 20.0 mm, in 1.00 s. What is the maximum speed of the pendulum bob? Use two dif...

Q: Marie slides a paper plate with a slice of pizza across a

Marie slides a paper plate with a slice of pizza across a horizontal table to her friend Jaden. The coefficient of friction between the table and plate is 0.32. If the pizza must travel 44 cm to get f...

Q: The pressure inside a bottle of champagne is 4.5 atm

The pressure inside a bottle of champagne is 4.5 atm higher than the air pressure outside. The neck of the bottle has an inner radius of 1.0 cm. (a) What is the frictional force on the cork due to th...

Q: Max’s arm weighs 34 N and is 63 cm long. If

Max’s arm weighs 34 N and is 63 cm long. If Max lets his relaxed arm swing back and forth like a pendulum, what is the period? Model the arm as a uniform rod.

Q: A hydraulic lift is lifting a car that weighs 12 kN.

A hydraulic lift is lifting a car that weighs 12 kN. The area of the piston supporting the car is A, the area of the other piston is a, and the ratio A/a is 100.0. How far must the small piston be pus...

Q: The pendulum for a grandfather clock consists of a thin rigid rod

The pendulum for a grandfather clock consists of a thin rigid rod (of negligible mass) with two metal disks attached to it. One disk has mass 0.600 kg and is attached to the rod 0.800 m from the pivot...

Q: Depressing the brake pedal in a car pushes on a piston with

Depressing the brake pedal in a car pushes on a piston with cross- sectional area 3.0 cm2. The piston applies pressure to the brake fluid, which is connected to two pistons, each with area 12.0 cm2. E...

Q: An owl has good night vision because its eyes can detect a

An owl has good night vision because its eyes can detect a light intensity as faint as 5.0 × 10−13 W/m2. What is the minimum number of photons per second that an owl eye can detect if its pupil has a...