Questions from College Physics

Q: The fuselage of an Airbus A340 has a circumference of 17.

The fuselage of an Airbus A340 has a circumference of 17.72 m on the ground. The circumference increases by 26 cm when it is in flight. Part of this increase is due to the pressure difference between...

Q: Find the electric field at point C, the center of the

Find the electric field at point C, the center of the square.

Q: Make a sketch (similar to Fig. 25.15b)

Make a sketch (similar to Fig. 25.15b) of the reflected rays from two adjacent steps of the Morpho butterfly wing for a large angle of incidence (around 45°). Refer to your sketch to explain why the w...

Q: A lens (n = 1.51) has an antireflective

A lens (n = 1.51) has an antireflective coating of MgF2 (n = 1.38). Which of the first two reflected rays has a phase shift of 180°? Suppose a different antireflective coating on a similar lens had n...

Q: Resilin is a rubber-like protein that helps insects to fly

Resilin is a rubber-like protein that helps insects to fly more efficiently. The resilin, attached from the wing to the body, is relaxed when the wing is down and is extended when the wing is up. As t...

Q: In the microwave experiment of Example 25.1 and in the

In the microwave experiment of Example 25.1 and in the Michelson interferometer, we ignored phase changes due to reflection from a metal surface. Microwaves and light are inverted when they reflect fr...

Q: Why does a crystal act as a three-dimensional grating for

Why does a crystal act as a three-dimensional grating for x-rays but not for visible light?

Q: Why do eyeglasses, camera lenses, and binoculars with antireflective coatings

Why do eyeglasses, camera lenses, and binoculars with antireflective coatings often look faintly purple?

Q: A metal plate is attached to the end of a rod and

A metal plate is attached to the end of a rod and positioned so that it can swing into and out of a perpendicular magnetic field pointing out of the plane of the paper as shown. In position 1, the pla...

Q: A certain amount of energy must be supplied to increase the current

A certain amount of energy must be supplied to increase the current through an inductor from 0 mA to 10 mA. Does it take the same amount of energy, more, or less to increase the current from 10 mA to...