Near the earth the intensity of radiation from the Sun is 1350 W/m2. What volume of space in this region contains 1.0 J of energy?
A)
4.5 × 10-6 m3
B)
3.3 × 102 m3
C)
7.4 × 10-4 m3
D)
1.4 × 103 m3
E)
2.2 × 105 m3
E
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Pseudoscience is best characterized as being
A) new age. B) an alternate view to be taken seriously. C) fake. D) all of the above
Matter falling into a black hole converts _______________ energy into thermal energy
Fill in the blank(s) with correct word
Which of the following is not evidence supporting the idea that our Moon formed as a result of a giant impact?
A) The Pacific Ocean appears to be a large crater—probably the one made by the giant impact. B) The Moon has a much smaller proportion of easily vaporized materials than Earth. C) The Moon's average density suggests it is made of rock much more like that of the Earth's outer layers than that of the Earth as a whole. D) Computer simulations show that the Moon could really have formed in this way.
A 1.20-kg ball is hanging on the end of a rope. The rope makes an angle 25.0° from the vertical when a 15.0 m/s horizontal wind blows. If the wind's force on the rope is negligible, what is the drag force on the ball?
A) 32.3 N B) 24.1 N C) 3.68 N D) 5.49 N E) 11.8 N