Isolated bells ring clearly, while bells crammed in a box have a muffled ring. This is analogous to light emitted by

A) a laser.
B) a fluorescent lamp.
C) an incandescent lamp.
D) a phosphorescent source.
E) none of the above


Answer: C

Physics & Space Science

You might also like to view...

Earth's original atmosphere was

A) very similar to the atmosphere we have today. B) rich in both O2 and O3. C) obliterated after the birth of the Sun. D) a mixture of N2, CO2, and O3.

Physics & Space Science

Shown that (a) Eb?/T 5 = f(?T) only. For ?T = 5000 ?m K, calculate Eb?/T 5.

GIVEN • ?T = 5000 ?m K = 0.005 m K FIND Shown that (a) Eb? /T 6 = f(?T) (b) Calculate E b? /T 5 for the ?T given

Physics & Space Science

The entropy of an isolated system must be conserved, so it never changes

A) True B) False

Physics & Space Science

A 320-g air track cart traveling at 1.25 m/s collides elastically with a stationary 270-g cart. What is the speed of the 320-g cart after the collision?

A) 0.678 m/s B) 0.106 m/s C) 0.212 m/s D) 1.36 m/s E) 1.14 m/s

Physics & Space Science