Questions from Modern Physics

Q: (a). Calculate the total rotational kinetic energy of the molecules

(a). Calculate the total rotational kinetic energy of the molecules in 1.00 mol of a diatomic gas at 300 K. (b). Calculate the moment of inertia of an oxygen molecule (O2) for rotation about either t...

Q: (a) Explain why in a gas of N molecules,

(a) Explain why in a gas of N molecules, the number of molecules having speeds in the finite interval v to v +

Q: Calculate the integral in Eq. (18.30),

Calculate the integral in Eq. (18.30), 0 ∞

Q: A vertical cylinder of radius r contains an ideal gas and is

A vertical cylinder of radius r contains an ideal gas and is fitted with a piston of mass m that is free to move (Fig. P18.79). The piston and the walls of the cylinder are frictionless, and the entir...

Q: You blow across the open mouth of an empty test tube and

You blow across the open mouth of an empty test tube and produce the fundamental standing wave of the air column inside the test tube. The speed of sound in air is 344 m/s and the test tube acts as a...

Q: A steel cylinder with rigid walls is evacuated to a high degree

A steel cylinder with rigid walls is evacuated to a high degree of vacuum; you then put a small amount of helium into the cylinder. The cylinder has a pressure gauge that measures the pressure of the...

Q: The vapor pressure of water (see Exercise 18.44)

The vapor pressure of water (see Exercise 18.44) decreases as the temperature decreases. The table lists the vapor pressure of water at various temperatures: Exercise 18.44: The vapor pressure is th...

Q: The statistical quantities “average value” and “root-mean

The statistical quantities “average value” and “root-mean-square value” can be applied to any distribution. Figure P18.82 shows...

Q: Section 18.1 states that ordinarily, pressure, volume,

Section 18.1 states that ordinarily, pressure, volume, and temperature cannot change individually without one affecting the others. Yet when a liquid evaporates, its volume changes, even though its pr...

Q: The hero of a western movie listens for an oncoming train by

The hero of a western movie listens for an oncoming train by putting his ear to the track. Why does this method give an earlier warning of the approach of a train than just listening in the usual way?...