A blackbody is an ideal system that
A) absorbs 100% of the light incident upon it, but cannot emit light of its own (i.e., a "black" body).
B) emits 100% of the light it generates, but cannot absorb radiation of its own.
C) either absorbs 100% of the light incident upon it, or emits 100% of the radiation it generates.
D) absorbs 50% of the light incident upon it, and emits 50% of the radiation it generates.
B
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Consider a galvanometer with full scale sensitivity of 333. ?A and a coil resistance of 33. ?
(a) What shunt resistance is needed to make a 5.0 A ammeter? (b) What series resistance is needed to construct a 5.0 volt voltmeter?
It is a misconception to imagine that space is empty-a vacuum
Indicate whether the statement is true or false
What is Astronomy?
What will be an ideal response?
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 small block on the large block?
a.
0.48 N to the right
b.
0.72 N to the right
c.
0.72 N to the left
d.
0.48 N to the left
e.
0.65 N to the left