If the Earth didn't have an atmosphere what would happen to its temperature?
a. It would go up.
b. It would go down.
c. It wouldn’t change.
Answer : b. It would go down.
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Why is the post-Main Sequence structure of a high mass star sometimes described by an "onion-layer" model? Explain
What will be an ideal response?
Determine the equivalent capacitance of the combination shown when C = 15 mF
a.
20 mF
b.
16 mF
c.
12 mF
d.
24 mF
e.
75 mF
When a body moves in a straight line with increasing speed, the net force on it must be increasing
a. True b. False Indicate whether the statement is true or false
A wheel (radius = 0.25 m) is mounted on a frictionless, horizontal axis. The rotational inertia of the wheel about the axis is 0.040 kg?m2. A light cord wrapped around the wheel supports a 0.50-kg object as shown in the figure. The object is released from rest. What is the magnitude of the acceleration of the 0.50-kg object?
?
?
a.
3.0 m/s2
b.
3.4 m/s2
c.
4.3 m/s2
d.
3.8 m/s2
e.
2.7 m/s2