Author Question: The glow in the night sky known as the Milky Way is light coming from A) a large cloud of glowing ... (Read 121 times)

TVarnum · **on:** Jul 29, 2018

The glow in the night sky known as the Milky Way is light coming from

A) a large cloud of glowing gas far out in space.
B) another galaxy, adjacent to our own galaxy.
C) stars in our own galaxy.
D) a band of glowing gases in Earth's upper atmosphere.
E) the reflection of sunlight off of a giant dust cloud that is illuminated by the sun.

Question 2

The principle stating that the work output of a heat engine must be less than its total energy input is called

A) the second law of thermodynamics.
B) the kinetic principle.
C) the first law of thermodynamics.
D) the law of conservation of energy.
E) Nonsense--there is no such physical law.