The Millikan oil-drop experiment demonstrated that:
a. small oil drops fall slowly through the air.
b. light beams can be used to illuminate small oil droplets.
c. the electronic charge is quantized.
d. falling oil droplets reach terminal speed.
c
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The planet with the Great Red Spot is
a. Jupiter. b. Neptune. c. Uranus. d. Saturn. e. Mars.
What is the average distance between the Sun and Earth?
a. 20 AU b. 10 AU c. 5 AU d. 2 AU e. 1 AU
Why is it difficult to observe an exoplanet directly through a telescope?
A. It is hard to see exoplanets against the blackness of space. B. Exoplanets are small compared to their parent star, so they reflect only a small portion of the star's light. C. Exoplanets tend to be far away from their parent stars, making it hard to get both the star and the exoplanet in the telescope's field of view. D. Exoplanet atmospheres absorb too much light
In your office, you have a rolling chair and a rolling filing cabinet. The chair weighs 10 pounds, and the filing cabinet weighs 50 pounds (it's partly full). If you push both of them away with about the same strength
A. the chair will accelerate about 5 times as much as the cabinet. B. the cabinet will accelerate about 25 times as much as the chair. C. the chair will accelerate about 25 times as much as the cabinet. D. the cabinet will accelerate about 5 times as much as the chair. E. both will accelerate about the same.