Without telescopes or other aid, we can see the Moon because it
A) emits visible light.
B) emits thermal radiation.
C) reflects infrared light.
D) reflects visible light.
E) glows through radioactive decay.
D
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The faintest visible stars to the naked eye have an apparent magnitude of about 6
Indicate whether the statement is true or false
Jim exerts a force of 500 N against a 100-kg desk that does not move. Virgil exerts a force of 400 N against a 60-kg desk that moves 2 m in the direction of the push. Mik exerts a force of 200 N against a 50-kg desk that moves 5 m in the direction of the push. The most work is done by
A. Jim. B. Mik. C. Virgil. D. Virgil and Mik, who do equal amounts of work.
The most abundant gas making up the Sun's composition is _______________
Fill in the blank(s) with correct word
Multiple-Object Accelerating Systems: A 5.0-kg block and a 4.0-kg block are connected by a 0.6 kg rod, as shown in the figure. The links between the blocks and the rod are denoted by A and B. A vertical upward force of magnitude F is applied to the upper block. The blocks and rod assembly are moving downward at constant velocity of 85 cm/s.(a) What is the magnitude of the applied force F?(b) What magnitude force does link A exert?
Fill in the blank(s) with the appropriate word(s).