Light with an average intensity of 683 W/m2 falls on a black surface and is completely absorbed. What is the radiation pressure that the light exerts on this surface if it strikes perpendicular to the surface?
(c = 3.00 × 108 m/s)
A) 1140 nN/m2 B) 2280 nN/m2 C) 4550 nN/m2 D) 205,000 N/m2
B
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Compared with the voltage input to a transformer, the voltage output can be
A) greater. B) less. C) greater or less.
At what distance from a point charge of 8.0 ?C would the electrical potential be 4.8 × 10^4 V? (ke = 8.99 × 10^9 N?m2/C2)
a. 1.8 m b. 0.43 m c. 1.5 m d. 5.4 m e. 0.60 m
The rotation curve for our Galaxy shows stars beyond the Sun moving slower than expected
Indicate whether the statement is true or false
A correct statement of the Second Law of Thermodynamics is
A. the random motion of gas molecules will be decreased if energy is added to a gas. B. no heat engine can have an efficiency greater than 30%. C. there is no process that can make heat flow from a cold object to a hot object. D. heat will not flow spontaneously from a cold object to a hot object.