The Cassini mission to Saturn consists of
A) an orbiter that orbits Saturn and a probe that descended to the surface of Titan.
B) a large spacecraft that flew by Saturn on its way to other planets.
C) an orbiter that orbits Saturn and a probe that descended into Saturn's atmosphere.
D) a spacecraft that orbits Saturn and a sample return mission that landed on Titan, scooped up a surface sample, and will return it to Earth.
A
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Atoms can be photographed by
A) electron beams. B) scanning electron microscopes. C) both of these D) neither of these
If you release a single molecule in an evacuated region it will initially
A) fall just as a baseball would. B) move in any direction. C) convect upward. D) be buoyed upward. E) none of the above
Lenz's Law is a consequence of the law of conservation of
A) mass. B) momentum. C) electric field. D) energy. E) charge.
Two identical balls are at rest and side by side at the top of a hill. You let one ball, A, start rolling down the hill. A little later you start the second ball, B, down the hill by giving it a shove. The second ball rolls down the hill along a line parallel to the path of the first ball and passes it. At the instant ball B passes ball A:
a. it has the same position and the same velocity as A. b. it has the same position and the same acceleration as A. c. it has the same velocity and the same acceleration as A. d. it has the same displacement and the same velocity as A. e. it has the same position, displacement and velocity as A.