Only Carnot efficiency is
A) Qout/Win.
B) 1 - Thot/Tcold.
C) 1 - Qcold/Qhot.
D) 1 - Qhot/Qcold.
E) 1 - Tcold/Thot.
E
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Segmented mirrors sag under their own weight. Their optical shape must be controlled by computer-driven thrusters under the mirrors in what is called
a. an achromatic lens. b. active optics. c. a Schmidt-Cassegrain design. d. a Newtonian design. e. interferometry.
In which of the following cases is the acceleration zero?
A. a car increases its speed from 0 mph to 30 mph B. a car decreases its speed from 15 mph to 5 mph C. a car goes around a curve at a speed of 30 mph D. a car backs out of a drive at 10 mph
Resonance occurs in an AC series circuit when which of the following conditions is met?
a. resistance equals capacitive reactance b. resistance equals inductive reactance c. capacitive reactance equals inductive reactance d. capacitive reactance equals zero
It is easy to look up the heat capacity of most objects in a reference book
What will be an ideal response?