An 800-N man stands at rest with his weight evenly distributed on two bathroom scales. The reading on each scale is
A) 200 N.
B) 400 N.
C) 800 N.
D) 1600 N.
E) none of the above
Answer: B
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Snell's Law: The index of refraction of a type of glass is 1.50, and the index of refraction of water is 1.33. If light enters water from this glass, the angle of refraction will be
A. greater than the angle of incidence. B. equal to the angle of incidence. C. less than the angle of incidence.
The average density of the Sun is about the same as that of Jupiter.
Answer the following statement true (T) or false (F)
In science, a range of possible values resulting from a measurement is referred to as
A) a deviation B) bias C) an error D) an uncertainty
During the past few million years, ice ages were MOST LIKELY caused by
A) changes in the distance from the Earth to the Sun B) small changes in the Earth's axis tilt and orbit C) changes in the heat released from the Earth D) changes in the energy output of the Sun