What did astronomers use in the anticoded message sent to globular cluster M13?
a. dashes and dots
b. numbers and letters
c. pulses and gaps
d. hieroglyphics
e. holograms
c
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The figure shows the speedometer readings as a car comes to a stop. Solve graphically for the acceleration at t = 7.0 s.
A. 2.5 
B. - 2.5
C. - 2.0
D. 2.0
Earth's axis is tilted by ________ degrees relative to the Celestial Equator.
A. 25 B. 23.5 C. 66.5 D. 11 E. 32.5
Compared to the planets in our own solar system, exoplanets have
A) a much narrow range of composition B) a much wider range of compositions C) an almost identical range of compositions D) completely different compositions
For the mercury in a thermometer to expand from 4.00 cm3 to 4.10 cm3, what change in temperature is necessary? The mercury has a volume expansion coefficient of 1.80 × 10-4 K-1
A) 400 C° B) 140 C° C) 14 C° D) 8.2 C°