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

Physics & Space Science

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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.

Physics & Space Science

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

Physics & Space Science

Dark matter does not affect galaxy collisions

Indicate whether the statement is true or false

Physics & Space Science

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.

Physics & Space Science