What is the maximum radiation pressure exerted by sunlight in space (S = 1350 W/m2) on a highly polished silver surface?
a. 1.4 × 10^?2 Pa
b. 0.12 Pa
c. 9.0 × 10^?6 Pa
d. 4.5 × 10^?5 Pa
e. 2.3 × 10^?6 Pa
c
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The amount of energy converted to light by an incandescent light bulb is about
A) 10% and the amount converted to heat about 90% B) 90% and the amount converted to heat about 10%. C) either of these depending on the brand.
Fermat's principle could be the principle of least distance for
A) reflection. B) refraction. C) both of these D) neither of these
Misty throws a stone horizontally from the roof edge of a 50. meter high dormitory. It hits the ground at a point 60. m from the building
(a) Determine the horizontal component of velocity just before hitting the ground. (b) What vertical speed did it have just before hitting the ground?
An ideal transformer with 120 turns in its secondary supplies 12 V at 220 mA to a toy train. The primary is connected across a 120-V wall outlet
(a) How many turns are in the primary? (b) What is the primary current? (c) What power is delivered by the wall outlet?