Earth is closest to the Sun during the month of January. Explain then why we do not experience our hottest weather in January in the northern hemisphere
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It is the tilt of the Earth on its rotational axis which gives rise to the seasons, not the relative Earth-Sun distance. In January, the northern hemisphere is tilted away from the Sun, so it is winter there.
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A sack of potatoes weighing 200 N falls from an airplane. As the velocity of fall increases, air resistance also increases. When air resistance equals 200 N, the sack's acceleration becomes
A) 0 m/s2. B) 5 m/s2. C) 10 m/s2. D) infinite. E) none of the above
Unlike Bohr, Schrödinger viewed electrons as
A) fixed in position. B) traveling in circles. C) tiny bullets. D) waves.
What is the specific surface of a heat exchanger?
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In the primary or inner rainbow, the
A. outer edge of the bow appears yellow and the inner edge appears green. B. outer edge of the bow appears red and the inner edge appears blue or violet. C. pot of gold is always at the left end. D. outer edge of the bow appears blue or violet and the inner edge appears red.