Materials generally become warmer when light is
A) absorbed by them.
B) reflected by them.
C) transmitted by them.
D) all of the above
E) none of the above
Answer: A
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a.
54 N
b.
47 N
c.
40 N
d.
62 N
e.
57 N
An altocumulus cloud belongs to which cloud family?
a. Low b. Clouds of vertical development c. High d. Middle
As a star like the Sun exhausts hydrogen in its core, the outer layers of the star
a. become hotter and more luminous. b. become cooler and more luminous. c. become hotter and less luminous. d. become cooler and less luminous. e. become larger in radius and hotter.
A small radio-controlled car's motor rated at 6 watts output is capable of performing ________ Joules of work in 15 seconds.
Fill in the blank(s) with the appropriate word(s).