Questions from College Physics

Q: An object that is 6.00 cm tall is placed 40

An object that is 6.00 cm tall is placed 40.0 cm in front of a diverging lens. The magnitude of the focal length of the lens is 20.0 cm. Find the image position and size. Is the image real or virtual?...

Q: The projector in a movie theater has a lens with a focal

The projector in a movie theater has a lens with a focal length of 29.5 cm. It projects an image of the 70.0 mm wide film onto a screen that is 38.0 m from the projector. (a) How wide is the image on...

Q: A loop of wire is connected to a battery and a variable

A loop of wire is connected to a battery and a variable resistor as shown. Two other loops of wire, B and C, are placed inside the large loop and outside the large loop, respectively. As the resistanc...

Q: An early cyclotron at Cornell University was used from the 1930s to

An early cyclotron at Cornell University was used from the 1930s to the 1950s to accelerate protons, which would then bombard various nuclei. The cyclotron used a large electromagnet with an iron yoke...

Q: (a) In the diagram, what are the potentials at

(a) In the diagram, what are the potentials at points a and b? Let V = 0 at infinity. (b) What is the change in electric potential energy if a third charge q3 = +2.00 nC is moved from point a to poin...

Q: A standard “35 mm” slide measures 24.0 mm

A standard “35 mm” slide measures 24.0 mm by 36.0 mm. Suppose a slide projector produces a 60.0 cm by 90.0 cm image of the slide on a screen. The focal length of the lens is 12.0 cm. (a) What is the...

Q: A relay race is run along a straight-line track of

A relay race is run along a straight-line track of length 300.0 m running south to north. The first runner starts at the south end of the track and passes the baton to a teammate at the north end of t...

Q: A light ray reflects from a plane mirror as shown in the

A light ray reflects from a plane mirror as shown in the figure. What is the angle of deviation δ?

Q: An underground explosion sends out both transverse (S waves) and

An underground explosion sends out both transverse (S waves) and longitudinal (P waves) mechanical wave pulses (seismic waves) through Earth's crust. Suppose the speed of transverse waves is 8.0 km/s...

Q: In order to read his book, Stephen uses a pair of

In order to read his book, Stephen uses a pair of reading glasses. When he holds the book at a distance of 25 cm from his eyes, the glasses form an upright image a distance of 52 cm from his eyes. (a...