Which of the following explains why we do not consider the surface of Mars to be habitable today?
A) Mars has too much carbon dioxide in its atmosphere.
B) Mars is located far outside the Sun's habitable zone.
C) The atmospheric pressure is too low for liquid water to be stable on the surface.
D) Mars is bombarded too often with asteroids and comets.
E) Mars has too little gravity for its surface to be habitable.
C) The atmospheric pressure is too low for liquid water to be stable on the surface.
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When a comet is in the inner solar system, what part of it points most directly away from the Sun?
A) the denser side of its nucleus B) its coma C) jets of gas emerging from its nucleus D) its tail
Refer to the figure above showing the abundance of elements in the galaxy relative to hydrogen. Why are elements with even numbers of protons more abundant, on average, than elements with odd numbers of protons?
A) because elements are mainly made in reactions with helium nuclei B) Because when elements split in a fission reaction, they prefer to split with all the protons paired. C) There's no explanation, it's something of a mystery to be explained, or it may be a coincidence. D) because elements are mainly made in reactions with hydrogen nuclei
A 10.0-? resistor, 10.0-mH inductor, and 10.0-?F capacitor are connected in series with a 10.0-kHz voltage source. The rms current through the circuit is 0.200 A. Find the rms voltage drop across each of the 3 elements
How did Thomson measure the charge to mass ratio of the electron?