The atmosphere of Saturn is composed mostly of:
A) methane and ammonia.
B) carbon dioxide and ethane.
C) hydrogen and helium.
D) hydrogen sulfide and ammonia.
E) nitrogen and oxygen.
C
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The ________ hemisphere of Mars is lower, smoother, and younger than the other one
Fill in the blank(s) with correct word
Suppose you claim that you are feeling the effects of a gravitational field. How can you explain the fact that Al is weightless?
A) She is weightless because she is moving at constant velocity. B) She is weightless because she is in a free-float frame. C) She is weightless because she is in free-fall. D) If you are in a gravitational field, then she cannot be weightless.
The equation of continuity is a statement of the
A) conservation of linear momentum. B) conservation of mass. C) conservation of energy. D) conservation of kinetic energy. E) conservation of angular momentum.
Calculate the de Broglie wavelength for an electron (m = 1 × 10^-30 kg) moving at 2.4 × 10^6 m/s