Light behaves primarily as a particle when it

A) travels from one place to another.
B) interacts with matter.
C) both of these
D) neither of these


Answer: B

Physics & Space Science

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Both RR Lyrae and Cepheid variables are giants that ________ in size over time

Fill in the blank(s) with correct word

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The mass of 1 cubic meter of fresh water is 1,000 kg. At the top of a 100 m hydroelectric dam the potential energy of the cubic meter of water is

a. 10,000 N. b. 98,000 N. c. 100,000 N. d. 980,000 N.

Physics & Space Science

If a sound level increases by 40 dB, the intensity increases by a factor of ______________

a. one hundred thousand b. ten thousand c. one thousand d. one million

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Consider a child who is swinging. As she reaches the lowest point in her swing:

a. the tension in the rope is equal to her weight. b. the tension in the rope is equal to her mass times her acceleration. c. her acceleration is downward at 9.8 m/s2. d. none of the above.

Physics & Space Science