A child on a playground swings through a total of 32 degrees. If the displacement is equal on each side of the equilibrium position, what is the amplitude of this vibration?
a. 32
b. 16
c. 64
Ans: b. 16
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Identify a true statement about the cosmic microwave background
A) It is blackbody radiation with an apparent temperature of 2.725 ± 0.002 K. B) It is radiation present in the ultraviolet spectrum. C) It is gamma radiation with an apparent temperature of 5.755 ± 0.005K. D) It is radiation that was present before the big bang.
Which of the following is NOT one of the four stages in the development of a terrestrial planet?
a. flooding b. cratering c. slow surface evolution d. fusion of hydrogen to helium e. differentiation
Assume that all the circuit elements have the same resistance. (b) Which bulb is (or bulbs are) dimmest? (To indicate a pair of bulbs using the letters at the back of the book, point to two letters at the same time.)
A. Bulb A
B. Bulb B
C. Bulb C
D. All three bulbs are equally bright.
Dark matter does not affect galaxy collisions
Indicate whether the statement is true or false