The coefficient of performance (COP) of a heat pump is defined as the ratio of
A)
the heat delivered to the inside to the heat taken from the outside.
B)
the heat taken from the outside to the heat delivered to the inside.
C)
the heat delivered to the inside to the work done to move the heat.
D)
the heat taken from the outside to the work done to move the heat.
E)
the difference between the heat taken from the outside from the heat delivered to the inside to the work done to move the heat.
C
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Check all that are functions of the cerebellum.
A. Receives sensory plans for movements B. Acts as the "principal" of unconscious physical actions by regulating functions of motor pathways C. Directly controls the influences of hormones and enzymes on skeletal muscles D. Indirectly affects the excitability of motor neurons
Organisms designated as producers usually obtain their energy from:
a. other producers b. dead consumers c. decomposers d. the environment e. themselves
Suppose we place a 100-g aluminum block with an initial temperature of 100°C in a Styrofoam cup containing a 100-g sample of water at 0°C. (The specific heats of aluminum and water are 900 J·kg-1K-1 and 4200 J·kg-1K-1, respectively.) The system’s final temperature is closest to
A. 0°C. B. 20°C. C. 50°C. D. 80°C. E. 100°C.
You slowly rub your wet finger around the thin rim of a wine glass while you hold its base firmly to a tabletop with your other hand. The resulting sounds illustrates
A) forced vibrations. B) resonance. C) both of these D) none of the above