Solar power is about
A. 1 watt per square meter
B. 1 kW per square meter
C. 1 megawatt per square km
D. 1 gigawatt per square km
Answer:
B. 1 kW per square meter
D. 1 gigawatt per square km
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The United States today gets nearly all of its energy from three energy resources. Which one of the following is not one of these three?
A) natural gas B) coal C) oil--i.e., petroleum D) nuclear
Two positively-charged plastic straws near each other tend to
A) attract each other. B) repel each other. C) neutralize each other.
A 2.0-kg object moving with a velocity of 5.0 m/s in the positive x direction strikes and sticks to a 3.0-kg object moving with a speed of 2.0 m/s in the same direction. How much kinetic energy is lost in this collision?
a. 2.4 J b. 9.6 J c. 5.4 J d. 0.6 J e. 6.0 J
Is it possible to see a waxing crescent moon on the overhead meridian at 10 A.M. local time? How about at 4 P.M. local time? Explain your answers