Why does Mars have seasons similar to the Earth?
a. Mars is roughly the same distance from the sun as Earth.
b. Mars has the same size as the Earth.
c. The shape of Mars' orbit is the same as the Earth's.
d. Mars' rotational axis is tilted relative to its orbit like the Earth's.
D
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If life exists in Uranus and Neptune, it will most likely be found
A) in the oceans of liquid ices beneath the surface B) floating on the surface of a layer of liquid metallic hydrogen C) high in the atmosphere where it could collect solar radiation D) at the center, close to the rocky core where a rocky surface exists
A comet is traveling at a speed of 50,000 mi/h when it is 100 million miles from the Sun. Compute its speed when it is 25 million miles from the Sun
If you are standing at the Earth's north pole, which of the following would be located at the zenith?
a. the nadir b. the star Vega c. the celestial equator d. the north celestial pole
Ohm's Law: The current through a piece of lab equipment must be limited to 2.75 A when it is run by a 120-V dc power supply. What must be the resistance of this equipment?
Fill in the blank(s) with the appropriate word(s).