The following image represents which kind of matter?
A) a mixture
B) a compound
C) an element
D) none of the above
E) all of the above
Answer: A
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Suppose that the energy difference between adjacent energy levels for an oscillator in an Einstein solid is ? = 0.005 eV. We would expect the average energy of this oscillator when it is in contact with a reservoir at room temperature to be
A. negligible.
B. smaller than 
kBT.
C. about equal to kBT.
D. about equal to kBT.
E. significantly larger than kBT.
F. One doesn’t have enough information to tell.
If - = 0, then the vectors and have equal magnitudes and are directed in the same direction
Indicate whether the statement is true or false
When the frequency of the light is increased in a photoelectric effect experiment, the energy of the emitted electrons
a. increases. b. decreases. c. stays the same. d. becomes more quantized. e. becomes less quantized.
A child is riding a merry-go-round that has an instantaneous angular speed of 1.25 rad/s and an angular acceleration of 0.745 rad/s2. The child is standing 4.65 m from the center of the merry-go-round
What is the magnitude of the linear acceleration of the child? A) 8.05 m/s2 B) 7.27 m/s2 C) 2.58 m/s2 D) 3.46 m/s2 E) 4.10 m/s2