What is the order of star colors with increasing temperature?
a. red, yellow, blue
b. blue, red, yellow
c. red, blue, yellow
d. yellow, red, blue
e. blue, yellow, red
a
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Which of the following is a free, open-source format used by Spotify?
A. .Au B. .wav C. .ogg D. .mp3
Even though ethane (C2H6 ) has a liquid temperature range almost as wide as water, it is not as good a biological solvent as water because it is a liquid at
A) much higher temperatures which would result in the breakdown of fragile biological molecules B) very high pressures that are unlikely to be found elsewhere C) very low pressures that are unlikely to be found elsewhere D) much lower temperatures which would result in extremely slow metabolic reactions
If kinetic energy is conserved by the apparatus shown in this figure, why do we find in class demonstrations that the balls eventually come to rest?
a. Because the commercial versions of this apparatus are not built to exact specifications. b. Total energy, not kinetic energy, is conserved; the rest of the energy going to heat; but the heat loss in this experiment is normally ignored since it occurs very slowly. c. Because as some of the balls come to rest, others speed up. d. Because a hidden battery supplies the energy to keep the balls moving, and eventually runs out of energy. e. Total energy but not kinetic energy is conserved, the rest of the energy going to heat; but the device transforms the thermal energy back to kinetic energy.
If you throw a ball straight downward (in the absence of air resistance), after leaving your hand its acceleration is
A) less than 10 m/s2. B) 10 m/s2. C) greater than 10 m/s2.