Mort weighs 700 newtons on Earth. He takes a low-orbit voyage in an Earth satellite. During the voyage his weight is
A) zero.
B) a little more than 700 newtons.
C) 700 newtons.
D) a little less than 700 newtons.
E) just a few newtons.
D
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A diffraction grating with 4000 lines/cm is illuminated by light from the sun. The solar spectrum is spread out on a white wall across the room. At what angle from the center line does blue light (400 nm) appear? At what angle from the center line does red light (650 nm) appear?
Which of the following best explains why we see horizontal "stripes" in photographs of Jupiter and Saturn?
A) Dark stripes are those in which there is a stratosphere and light stripes are those with no stratosphere. B) The dark and light stripes correspond to alternating bands of different chemical composition. C) The light stripes are regions of high clouds, and the dark stripes are regions where we can see down to deeper, darker clouds. D) There are three different color stripes corresponding to the three different types of clouds found on these planets.
If you could find a bathtub big enough for Saturn, the planet would
A) explode due to its liquid metallic hydrogen. B) sink due to its metallic interior. C) catch fire, as liquid sodium reacts with water. D) float. E) precipitate more helium.
A boat loaded with wood floats in a swimming pool. When the wood is thrown overboard, the pool level
A) rises. B) falls. C) remains unchanged.