Two sounds of the same intensity are added together. The intensity of the resulting sound is how much greater than the intensity of one of the original sounds?
1.It is the same intensity.
2.It is twice the intensity.
3.It is three times the intensity.
4.It is four times the intensity.
2
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Two blocks are accelerated across a horizontal frictionless surface as shown. Frictional forces keep the two blocks from sliding relative to each other, and the two move with the same acceleration. If F = 1.2 N and M = 1.0 kg, what is the horizontal component (frictional force) of the force of the large block on the small block?
a.
0.40 N to the left
b.
0.80 N to the right
c.
0.40 N to the right
d.
0.80 N to the left
e.
1.20 N to the left
Describe paramagnetism
What will be an ideal response?
A student lifts a weight of 10.0 N a distance of 0.5 meters. If this exercise is repeated 50 times in 100 seconds, then the power of this exercise is
A. 2.5 Watts. B. 3.1 Watts. C. 3.6 Watts. D. 4.0 Watts. E. 4.8 Watts.
In a resonating pipe which is open at one end and closed at the other, there
A) are displacement nodes at each end. B) are displacement antinodes at each end. C) is a displacement node at the open end and a displacement antinode at the closed end. D) is a displacement node at the closed end and a displacement antinode at the open end.