Questions from College Physics

Q: 1. The compound microscope is made from two lenses. Which

1. The compound microscope is made from two lenses. Which statement is true concerning the operation of the compound microscope? (a) Both lenses form real images. (b) Both lenses form virtual images....

Q: An automobile with a mass of 1600 kg has a speed of

An automobile with a mass of 1600 kg has a speed of 30.0 m/s. What is its kinetic energy?

Q: Show that each of these statements implies that v ≪ c,

Show that each of these statements implies that v ≪ c, which means that v can be considered a nonrelativistic speed: (a) γ − 1 ≪ 1 [Eq. (26-26)]; (b) K ≪ mc2 [Eq. (26-27)]; (c) p ≪ mc [Eq. (26-28)]...

Q: Is the buoyant force on a soap bubble greater than the weight

Is the buoyant force on a soap bubble greater than the weight of the bubble? If not, why do soap bubbles sometimes appear to float in air?

Q: The period of oscillation of a simple pendulum does not depend on

The period of oscillation of a simple pendulum does not depend on the mass of the bob. By contrast, the period of a mass-spring system does depend on mass. Explain the apparent contradiction. [Hint: W...

Q: When the NASA Rover Spirit successfully landed on Mars in January of

When the NASA Rover Spirit successfully landed on Mars in January of 2004, Mars was 170.2 × 106 km from Earth. Twenty-one days later, when the Rover Opportunity landed on Mars, Mars was 198.7 × 106 km...

Q: The mechanical power output of a cyclist moving at a constant speed

The mechanical power output of a cyclist moving at a constant speed of 6.0 m/s on a level road is 120 W. (a) What is the force exerted on the cyclist and the bicycle by the air? (b) By bending low o...

Q: Describe the difference between specular and diffuse reflection. Give some examples

Describe the difference between specular and diffuse reflection. Give some examples of each.

Q: A sound wave with an intensity level of 80.0 dB

A sound wave with an intensity level of 80.0 dB is incident on an eardrum of area 0.600 × 10−4 m2. How much energy is incident on the eardrum in 3.00 min?

Q: An external magnetic field parallel to the central axis of a 50

An external magnetic field parallel to the central axis of a 50 turn coil of radius 5.0 cm increases from 0 to 1.8 T in 3.6 s. (a) If the resistance of the coil is 2.8 Ω, what is the magnitude of the...