The solar constant is a measure of:
A) the energy received by the Sun on Earth's surface.
B) the energy received by the Sun at the location of Earth.
C) the energy received by the Sun at any location in the solar system.
D) the energy emitted by the Sun at the photosphere.
E) the total energy emitted by the Sun in all directions.
B
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A. 20 ?T B. 30 ?T C. 40 ?T D. 50 ?T E. 60 ?T
An auto, starting from rest, undergoes constant acceleration and covers a distance of 1250 meters. The final speed of the auto is 50 meters/sec. How long does it take the car to cover the 1250 meters?
A. 0.05 s B. 72,000 s C. 50 s D. 30 s
When water of mass m and specific heat c is heated from absolute temperature T1 to absolute temperature T2, its change in entropy is
a. cm ln(T2/T1) b. cm (T2/T1) c. cm (T2 ? T1)/T1 d. cm (T2 ? T1)/T2 e. cm (T2 ? T1)/(T2 + T1)