Questions from College Physics

Q: What is wrong with the following statement: “Given any two

What is wrong with the following statement: “Given any two bodies, the one with the higher temperature contains more heat.”

Q: Star A has twice the radius and twice the absolute temperature of

Star A has twice the radius and twice the absolute temperature of star B. What is the ratio of the power output of star A to that of star B? The emissivity of both stars can be assumed to be 1. (a) 4...

Q: Power P0 = I0 ΔV0 is delivered to a resistor of resistance

Power P0 = I0 ΔV0 is delivered to a resistor of resistance R0. If the resistance is doubled (Rnew = 2R0) while the voltage is adjusted such that the current is constant, what are the ratios (a) Pnew/P...

Q: A 55-kg student eats a 540-Calorie (540

A 55-kg student eats a 540-Calorie (540 kcal) jelly doughnut for breakfast. (a) How many joules of energy are the equivalent of one jelly doughnut? (b) How many stairs must the student climb to perfor...

Q: A thermodynamic process occurs in which the entropy of a system changes

A thermodynamic process occurs in which the entropy of a system changes by -6 J/K. According to the second law of thermodynamics, what can you conclude about the entropy change of the environment? (a)...

Q: If a grandfather clock were running slow, how could we adjust

If a grandfather clock were running slow, how could we adjust the length of the pendulum to correct the time?

Q: If you stretch a rubber hose and pluck it, you can

If you stretch a rubber hose and pluck it, you can observe a pulse traveling up and down the hose. What happens to the speed of the pulse if you stretch the hose more tightly? What happens to the spee...

Q: Identify each of the following waves as either transverse or longitudinal:

Identify each of the following waves as either transverse or longitudinal: (a) The waves on a plucked guitar string. (b) The sound waves produced by a vibrating guitar string. (c) The waves on a sprin...

Q: If an object – spring system is hung vertically and set into

If an object – spring system is hung vertically and set into oscillation, why does the motion eventually stop?

Q: If the spring constant shown in Figure CQ13.3 is doubled

If the spring constant shown in Figure CQ13.3 is doubled to 2k0, determine (a) The ratio of the new force to the original force, Fn/F0, and (b) The ratio of the new to the original elastic potential e...