Can we be certain that one of the balloons in Question 2 is electrostatically charged?
Yes. At least one balloon must possess a charge in order to induce a charge on the
other one, or as stated above both balloons could be charged.
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Consider an experiment where we send monochromatic light to a distant screen through a single narrow slit. The distance between adjacent dark fringes in the diffraction pattern displayed on the screen (A) increases, (B) decreases, or (C) remains the same if, The intensity of the light increases
A. Increases B. Decreases C. Remains the same
Why is atmospheric pressure less on top of a mountain than at sea level?
a. It is cooler in the mountains. b. Denser air sinks to sea level; the air on mountains is lighter. c. The pressure at every height in the atmosphere is due to the weight of the air above it. d. None of the above.
For a white dwarf to explode entirely as a Type I supernova, its mass must be:
A) at least 0.08 solar masses. B) 1.4 solar masses, the Chandrasekhar Limit. C) 3 solar masses, the Schwartzschild Limit. D) 20 solar masses, the Hubble Limit. E) 100 solar masses, the most massive known stars.
If a man wishes to use a plane mirror on a wall to view both his head and his feet as he stands in front of the mirror, the required length of the mirror:
a. is equal to the height of the man. b. is equal to one half the height of the man. c. depends on the distance the man stands from the mirror. d. depends on both the height of the man and the distance from the man to the mirror.