In contrast to Aristotle's way of explaining nature, Galileo relied on
A) experiment.
B) logic.
C) patterns.
D) mathematics.
Answer: A
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All main-sequence G stars have approximately the same mass
Indicate whether the statement is true or false
The ozone layer
a. reflects all EM waves b. reflects high frequency radio waves c. reflects low frequency radio waves d. is responsible for the greenhouse effect e. absorbs ultraviolet light in sunlight
A cup of water containing an ice cube at 0°C is filled to the brim. The tip of the ice cube sticks out of the surface. As the ice melts, you observe that
A) the cup overflows. B) the water level actually goes down. C) the water level remains the same. D) the cup might overflow but it depends on the actual mass of the ice cube. E) There is not enough information to answer this question.
An electron is moving at 
m/s perpendicular to a uniform magnetic field. If the radius of the motion is 18 mm, what is the magnitude of the magnetic field?
A. 70 mT
B. 0.95 mT
C. 9.3 mT
D. 1.6 
T
E. 8.9 nT