Coefficient of performance is

A) 1 - Qcold/Qhot.
B) Q/m.
C) Qout/Win.
D) Q - W.
E) 1 - Tcold/Thot.


C

Physics & Space Science

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If an aluminum alloy’s numerical designation is followed by “H18”, it is strainhardened to _________hardness.

Fill in the blank(s) with the appropriate word(s).

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LR Circuits: A simple series circuit contains a 6.0-? resistor, an ideal 15-V DC power supply, and an 18-H inductor. What the time constant of this circuit?

A. 110 s B. 3.0 s C. 0.33 s D. None of the given answers are correct.

Physics & Space Science

How would an inflated landing module bounce if it were dropped ontothe surface ofEarth from the same altitude as it was on Mars?

a) It would bounce higher sometimes and lower sometimes on the surface of Mars. b) It would not bounce at all. c) It would bounce higher and slower than it did on the surface of Mars. d) It would bounce lower and fewer times than it did on the surface ofMars. e) It would bounce higher and more times than it did on the surface ofMars.

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For uniform circular motion, the velocity and acceleration vectors are perpendicular to each other at every point in the path

Indicate whether the statement is true or false

Physics & Space Science