Questions from College Physics

Q: A mass-spring system oscillates so that the position of the

A mass-spring system oscillates so that the position of the mass is described by x = (−10 cm) cos [(1.57 rad/s)t]. Make a motion diagram that has a dot for the position of the mass at t = 0, t = 0.2 s...

Q: What is the temperature of an ideal gas whose molecules in random

What is the temperature of an ideal gas whose molecules in random motion have an average translational kinetic energy of 4.60 × 10−20 J?

Q: A hot air balloon with a volume of 12.0 m3

A hot air balloon with a volume of 12.0 m3 is initially filled with air at a pressure of 1.00 atm and a temperature of 19.0°C. When the balloon air is heated, the volume and the pressure of the balloo...

Q: A giraffe’s brain is approximately 3.4 m above its heart

A giraffe’s brain is approximately 3.4 m above its heart. Estimate the minimum gauge pressure that its heart must produce to move the blood to his brain. Ignore any effects from the blood flow through...

Q: On a cold day, you take a breath, inhaling 0

On a cold day, you take a breath, inhaling 0.50 L of air whose initial temperature is −10°C. In your lungs, its temperature is raised to 37°C. Assume that the pressure is 101 kPa and that the air may...

Q: In a certain bimetallic strip (see Fig. 13.7

In a certain bimetallic strip (see Fig. 13.7) the brass strip is 0.100% longer than the steel strip at a temperature of 275°C. At what temperature do the two strips have the same length?

Q: Show that the rms speed of a molecule in an ideal gas

Show that the rms speed of a molecule in an ideal gas at absolute temperature T is given by where m is the mass of a molecule.

Q: The driver from Practice Problem 13.3 fills his 18.

The driver from Practice Problem 13.3 fills his 18.9 L steel gasoline can in the morning when the temperature of the can and the gasoline is 15.0°C and the pressure is 1.0 atm, but this time he rememb...

Q: Show that the rms speed of a molecule in an ideal gas

Show that the rms speed of a molecule in an ideal gas at absolute temperature T is given by where M is the molar mass—the mass of the gas per mole.

Q: An iron bridge girder (Y = 2.0 × 1011

An iron bridge girder (Y = 2.0 × 1011 N/m2) is constrained between two rock faces whose spacing doesn't change. At 20.0°C the girder is relaxed. How large a stress develops in the iron if the sun heat...