Thermal Expansion: 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°
Answer: B
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A sunspot maximum occurred in the year 2015. If the solar cycle continues, the year of the sunspot maximum that immediately follows the 2015 cycle maximum will be _____
A) 2026 B) 2020 C) 2016 D) 2030
A(n) ____________ is a solar-system object that enters Earth's atmosphere and becomes very hot due to friction between the object and Earth's atmosphere and does not survive to reach the surface
a. asteroid b. meteor c. comet d. meteoroid e. planetesimal
Falling objects [dropped near the earth's surface, neglecting air resistance] all fall at
A) an acceleration that is larger for more massive objects. B) the same constant [or unchanging] acceleration. C) zero acceleration. D) the same constant [or unchanging] velocity. E) the same constant (or unchanging) speed.
In many cartoon shows, a character runs of a cliff, realizes his predicament and lets out a scream. He continues to scream as he falls
If the physical situation is portrayed correctly, from the vantage point of an observer at the top of the cliff leaning over the edge, the pitch of the scream should be A) higher than the original pitch and constant. B) higher than the original pitch and increasing as he falls. C) lower than the original pitch and constant. D) lower than the original pitch and decreasing as he falls. E) It is impossible to predict.