Questions from College Physics

Q: A flight attendant wants to change the temperature of the air in

A flight attendant wants to change the temperature of the air in the cabin from 18.0°C to 21.0°C without changing the pressure. What fractional change in the number of moles of air in the cabin would...

Q: When playing fortissimo (very loudly), a trumpet emits sound energy

When playing fortissimo (very loudly), a trumpet emits sound energy at a rate of 0.800 W out of a bell (opening) of diameter 12.7 cm. (a) What is the sound intensity level right in front of the trump...

Q: A cylinder in a car engine takes Vi = 4.50

A cylinder in a car engine takes Vi = 4.50 × 10−2 m3 of air into the chamber at 30°C and at atmospheric pressure. The piston then compresses the air to one-ninth of the original volume (0.111 Vi) and...

Q: During a rehearsal, all eight members of the first violin section

During a rehearsal, all eight members of the first violin section of an orchestra play a very soft passage. The sound intensity level at a certain point in the concert hall is 38.0 dB. What is the sou...

Q: A tire with an inner volume of 0.0250 m3 is

A tire with an inner volume of 0.0250 m3 is filled with air at a gauge pressure of 36.0 lb/in2. If the tire valve is opened to the atmosphere, what volume outside of the tire does the escaping air occ...

Q: Someone steps on your toe, exerting a force of 500 N

Someone steps on your toe, exerting a force of 500 N on an area of 1.0 cm2. What is the average pressure on that area in atm?

Q: Two blocks lie side by side on a frictionless table. The

Two blocks lie side by side on a frictionless table. The block on the left is of mass m; the one on the right is of mass 2m. The block on the right is pushed to the left with a force of magnitude F, p...

Q: (a) Show that since the bulk modulus has SI units

(a) Show that since the bulk modulus has SI units N/m2 and mass density has SI units kg/m3, Eq. (12-1) gives the speed of sound in m/s. Thus, the equation is dimensionally consistent. (b) Show that n...

Q: Explain why the orbital radius and the speed of a satellite in

Explain why the orbital radius and the speed of a satellite in circular orbit are not independent.

Q: Six cylinders contain ideal gases (not necessarily the same gas)

Six cylinders contain ideal gases (not necessarily the same gas) with the properties given (P = pressure, V = volume, N = number of molecules). Rank them in order of temperature, highest to lowest. (a...