A surveyor stands 100 m from the base of a building, and uses a transit to determine that the angle of elevation to the building's roof is 19.0°. If the transit height is 0.80 m, what is the height of the building?
a. 94.6 m
b. 95.4 m
c. 35.2 m
d. 34.4 m
c
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If Galaxy A is found to have a recessional velocity four times greater than Galaxy B, what can you say about their relative distances from Earth?
a. Galaxy A is four times closer than Galaxy B. b. Galaxy A is four times further away than Galaxy B. c. Galaxy A is twice as distant than Galaxy B. d. Galaxy A is twice as close than Galaxy B.
What is the greatest mass a newborn star can have
A) 10 solar masses. B) 20 solar masses. C) 50 solar masses. D) a few hundred solar masses.
An uncharged conductor is supported by an insulating stand. I pass a positively charged rod near the left end of the conductor, but do not touch it. The right end of the conductor will be:
a. neutral. c. attracted. b. positive. d. negative.
A uniform meterstick balances on a fulcrum placed at the 40-cm mark when a weight W is placed at the 20-cm mark. What is the weight of the meterstick?
a. W c. W/2 b. 2W d. 0.4W