"Half integral spin" means spin
a. 1/2 c. 1/2, 3/2, 5/2, ...
b. 1/2, 1, 3/2, 2, ... d. none of the above
C
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The zone of avoidance is the region around the massive black hole found at the center of the Galaxy.
Answer the following statement true (T) or false (F)
An ore car of mass 4000 kg starts from rest and rolls downhill on tracks from a mine. A spring with k = 400,000 N/m is located at the end of the tracks. At the spring's maximum compression, the car is at an elevation 10 m lower than its elevation at the starting point. How much is the spring compressed in stopping the ore car? Ignore friction.
What will be an ideal response?
For an object that travels at a fixed speed along a circular path, the acceleration of the object is
A) larger in magnitude the smaller the radius of the circle. B) in the same direction as the velocity of the object. C) smaller in magnitude the smaller the radius of the circle. D) in the opposite direction of the velocity of the object. E) zero.
Infra-red radiation is produced by
A) mechanical oscillators that move air back and forth. B) molecules in thermal motion. C) nuclear vibrations. D) electric currents oscillating in human-made electronic devices. E) electrons orbiting around the nucleus in atoms.