Questions from College Physics

Q: A parallel-plate capacitor consists of two flat metal plates of

A parallel-plate capacitor consists of two flat metal plates of area A separated by a small distance d. The plates are given equal and opposite net charges ±q. (a) Sketch the field lines and use your...

Q: When a standing wave is produced in a string fixed at both

When a standing wave is produced in a string fixed at both ends, the string oscillates so fast that it looks like a blur. You want to photograph the string when it is at positions A, B, and C shown in...

Q: Find the average angular speed of the second hand of an analog

Find the average angular speed of the second hand of an analog clock. What is its angular displacement during 5.0 s?

Q: Two ions with the same velocity and mass but different charges enter

Two ions with the same velocity and mass but different charges enter the magnetic field of a mass spectrometer. One is singly charged (q = +e) and the other is doubly charged (q = +2e). Is the radius...

Q: If the potential is the same at every point throughout a region

If the potential is the same at every point throughout a region of space, is the electric field the same at every point in that region? What can you say about the magnitude of / in the region? Explai...

Q: A bar magnet is initially at rest inside a coil as shown

A bar magnet is initially at rest inside a coil as shown. The magnet is then pulled out from the left side. (a) In which direction does current flow through the galvanometer as the magnet is pulled a...

Q: The human mandible (lower jaw) is attached to the temporomandibular

The human mandible (lower jaw) is attached to the temporomandibular joint (TMJ). The masseter muscle is largely responsible for pulling the mandible upward when you are talking or eating. It is attach...

Q: A 69.0 kg short-track ice skater is racing

A 69.0 kg short-track ice skater is racing at a speed of 11.0 m/s when he falls down and slides across the ice into a padded wall that brings him to rest. Assuming that he doesn’t lose any speed durin...

Q: A bar magnet approaches a coil as shown. (a

A bar magnet approaches a coil as shown. (a) In which direction does current flow through the galvanometer as the magnet approaches? (b) How does the magnitude of the current depend on the number of...

Q: Sean climbs a tower that is 82.3 m high to

Sean climbs a tower that is 82.3 m high to make a jump with a parachute. The mass of Sean plus the parachute is 68.0 kg. If U = 0 at ground level, what is the potential energy of Sean and the parachut...