In any particular place on Earth, certain constellations are visible in the evening only at certain times of the year because ________
A) our evening view of space depends on where Earth is located in its orbit around the Sun
B) some constellations are circumpolar
C) on any particular night, we can only see stars that are directly opposite (180 degrees away from) the Sun in the sky
D) during some times of year, some constellations drop below the southern horizon
A
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Fossils of early life are very difficult to identify in very old rocks because early life
A) was very simple and microscopic in size B) was not made of organic material that could be replaced by minerals C) was so different to life found on Earth today that we are not capable of identifying it D) did not leave behind any fossilized remains
Earth's lower atmosphere is warm because of
A) incoming solar radiation. B) terrestrial radiation. C) cloud cover. D) outgoing short-wave radiation.
The wavelength of a light beam is doubled. Which one of the following is correct for the momentum of photons for that light beam?
A) It is halved. B) It stays the same. C) It is doubled. D) It is reduced by one-fourth E) It is quadrupled.
A person wearing a heavy parka is standing in a cold wind. Describe the modes of heat transfer determining heat loss from the person’s body.
GIVEN
- Person standing in a cold wind, wearing a heavy parka
FIND
(a) The modes of heat transfer
SKETCH
