An atom that absorbs a certain amount of energy can then emit
A) only a photon of that energy.
B) a photon of any energy.
C) a photon of the same or higher energy.
D) a photon of the same or lower energy.
Answer: D
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Graphical Analysis: The graph in the figure shows the position of a particle as it travels along the x-axis. What is the magnitude of the instantaneous velocity of the particle when t = 1.0 s?
Fill in the blank(s) with the appropriate word(s).
Many of Saturn's outer smaller moons, like Phoebe, orbit ________ compared to the planet's rotation
Fill in the blank(s) with correct word
Radioactive decay occurs when
A) a nucleus emits a particle spontaneously B) bacteria and other microscopic organisms digest nuclear particles. C) a nucleus is struck and broken into pieces by a fast moving particle. D) an atom loses one or more orbital electrons. E) two or more nuclei fuse together.
If you see an object rotating, is there necessarily a net nonzero torque acting on it?
1.yes. 2.only if it is rotating with a constant angular speed 3.No, a net nonzero torque would not cause an object to rotate. 4.only if the object's angular speed changes