What method was used to determine the absolute ages of the lunar rock samples from the Apollo missions?
a. electromagnetic measuring
b. radar imaging
c. telescopic observations
d. microscopic evaluation
e. radioactive dating
e
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Velocity: A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m. She completes one lap in 100 seconds. What is her average speed?
A. 2.5 m/s B. 5.0 m/s C. 10 m/s D. 0 m/s E. 1.3 m/s
What is centripetal force?
a. A force that seeks the center of a circle. b. A force that seeks the edge of a circle. c. A force that makes an object stop traveling in a circle. d. A force that turns the pedals of a bicycle. e. A force that keeps an object from hitting the ground.
Series/Parallel Circuits: Three resistors of 12 ?, 12 ?, and 6.0 ? are connected together, and an ideal 12-V battery is connected across the combination. What is the current from the battery if they are connected (a) in series or (b) in parallel?
Fill in the blank(s) with the appropriate word(s).
The power of an engine is a measure of
A. the total amount of work it can perform. B. its volume. C. its ability to outperform a horse. D. the rate at which it can perform work.