Questions from College Physics

Q: A lizard of mass 3.0 g is warming itself in

A lizard of mass 3.0 g is warming itself in the bright sunlight. It casts a shadow of 1.6 cm2 on a piece of paper held perpendicularly to the Sun's rays. The intensity of sunlight at Earth is 1.4 × 10...

Q: A reversible heat engine has an efficiency of 33.3%,

A reversible heat engine has an efficiency of 33.3%, removing heat from a hot reservoir and rejecting heat to a cold reservoir at 0°C. If the engine now operates in reverse, how long would it take to...

Q: Three types of sigma baryons can be created in accelerator collisions.

Three types of sigma baryons can be created in accelerator collisions. Their quark contents are given by uus, uds, and dds, respectively. What are the electric charges of each of these sigma particles...

Q: Mitch drops a 2.0 g coin into a 3.

Mitch drops a 2.0 g coin into a 3.0 m deep wishing well. What is the de Broglie wavelength of the coin just before it hits the bottom of the well?

Q: An incandescent lightbulb radiates at a rate of 60.0 W

An incandescent lightbulb radiates at a rate of 60.0 W when the temperature of its filament is 2820 K. During a brownout (temporary drop in line voltage), the power radiated drops to 58.0 W. What is t...

Q: In a movie, a stuntman places himself on the vertical front

In a movie, a stuntman places himself on the vertical front of a truck as the truck accelerates. The coefficient of friction between the stuntman and the truck is 0.65. The stuntman is not standing on...

Q: An IV is connected to a patient’s vein. The blood in

An IV is connected to a patient’s vein. The blood in the vein has a gauge pressure of 12 mmHg. At least how far above the vein must the IV bag be hung in order for fluid to flow into the vein? Assume...

Q: A fish at a pressure of 1.1 atm has its

A fish at a pressure of 1.1 atm has its swim bladder inflated to an initial volume of 8.16 mL. If the fish starts swimming horizontally, its temperature increases from 20.0°C to 22.0°C as a result of...

Q: If the maximum intensity of radiation for a blackbody is found at

If the maximum intensity of radiation for a blackbody is found at 2.65 um, what is the temperature of the blackbody?

Q: (a) Find the work done by the engine during each

(a) Find the work done by the engine during each of the four steps and the net work done for the cycle. (b) If the heat input per cycle is 2770 J, what is the efficiency of the engine? (c) Compare t...