Estimate how many times you would have to fold a sheet of paper until it becomes as thick as a large dictionary (approximately 10 cm thick)
A) 10 times
B) 50 times
C) 100 times
D) 500 times
E) 1000 times
A
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The eccentricity of a planet's orbit describes
a. westward motion in the night sky when observed on successive nights. b. the deviation in shape when compared to a circle. c. its tilt with respect to the ecliptic plane. d. the tilt of the planet's rotational axis with respect to the ecliptic.
Venus is much hotter than the Earth. Which of the following explains most of this temperature difference?
A) Venus has much more carbon dioxide in its atmosphere. B) Venus's clouds have a very high reflectivity. C) Venus rotates backward compared to its orbital rotation. D) The sunlight reaching Venus is more concentrated because of its closer distance to the Sun.
Area on a PV diagram has units associated with
a. energy. b. momentum. c. temperature. d. change in temperature.
A zoom lens is adjusted to change its focal length from 38 mm to 304 mm. If the same amount of light is to be admitted to the lens, what is the final f-number if the original f-number was 2.0?
What will be an ideal response?