Which has a greater mass?
A) four protons
B) two neutrons and two protons in a helium nucleus
C) A and B both have exactly the same mass.
A
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The figure shows two wires tied to a 3.3 kg sphere that revolves in a horizontal circle at constant speed. At this particular speed the tension is the SAME in both wires. What is the tension?
A) 24 N B) 32 N C) 44 N D) 22 N
If one of the pair of Magdeburg hemispheres were fastened to a strong tree, the force needed by a single party to pull them apart would be
A) half as much. B) the same. C) twice as much. D) none of the above
The jovian planets in our solar system are
A) Mercury, Venus, Earth, and Mars. B) Jupiter, Saturn, Uranus, Neptune, Pluto, and Eris. C) Jupiter, Saturn, Uranus, and Neptune. D) Io, Europa, Ganymede, and Callisto.
Several electrons are placed on a hollow conducting sphere. They
A) clump together on the sphere's outer surface. B) clump together on the sphere's inner surface. C) become uniformly distributed on the sphere's outer surface. D) become uniformly distributed on the sphere's inner surface. E) become randomly distributed on the shere's outer and inner surfaces.