Fundamental Forces: The main reason that there is a limit to the size of a stable nucleus is
A. the limited range of the gravitational force.
B. the short range nature of the strong nuclear force.
C. the weakness of the gravitational force.
D. the weakness of the electrostatic force.
Answer: B
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To double the light-gathering power of a telescope, we need to double the diameter.
Answer the following statement true (T) or false (F)
Ripples in the Cosmic Microwave Background correspond to
A) matter density fluctuations. B) temperature fluctuations. C) energy fluctuations. D) fluctuations in both matter and radiation. E) imperfections in measurement techniques or equipment.
An aquifer is a reservoir of water beneath the ground surface. Describe five physical zones in an aquifer. (Hint: Consider in-flow and out-flow.)
What will be an ideal response?
Starting outside the region with the magnetic field, a single square coil of wire enters, moves across, and then leaves the region with a uniform magnetic field 
perpendicular to the page so that the graph shown below represents the induced emf. The loop moves at constant velocity
. As seen from above, a counterclockwise emf is regarded as positive. In which direction did the loop move over the plane of the page?
a.
The loop moved from bottom to top.
b.
The loop moved from top to bottom.
c.
The loop moved from left to right.
d.
The loop moved from right to left.
e.
All of these directions of motion will produce the graph of emf vs t.