Oxygen molecules are 16 times more massive than hydrogen molecules. At a given temperature, the average molecular kinetic energy of oxygen, compared to hydrogen,
A) is greater.
B) is less.
C) is the same.
D) cannot be determined since pressure and volume are not given.
C
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The energy in the atmospheres of most of the jovian planets comes
A) almost entirely from their interiors. B) almost entirely from the Sun. C) both the Sun and their interiors, with both contributing significantly. D) tidal heating.
_________ are neutron stars that have magnetic fields 100 times stronger than the average neutron star
a. Hypernovae b. Collapsars c. Pulsars d. Kerr singularities e. Magnetars
A 60-kg swimmer suddenly dives horizontally from a 150-kg raft with a speed of 1.5 m/s. The raft is initially at rest
What is the speed of the raft immediately after the diver jumps, assuming that the water has negligible effect on the raft during the jump?
Equilibrium: A meter stick balances at the 50.0-cm mark. If a mass of 50.0 g is placed at the 90.0-cm mark, the stick balances at the 61.3-cm mark. What is the mass of the meter stick?
A. 127 g B. 178 g C. 89.7 g D. 32.6 g E. 73.4 g