List the seven physical properties for identifying minerals
What will be an ideal response?
Answer: The physical properties include crystal form, hardness, cleavage, luster, color, streak, and density.
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A heat pump can
A) cool an environment. B) warm an environment. C) both of these D) neither of these
Carnot Engine: The ocean thermal energy conversion project uses the surface water near tropical islands with a temperature of 20°C as the hot temperature reservoir, and the water at some depth, with a temperature of 5.0°C, as the cold temperature reservoir for a heat engine. What is the maximum possible efficiency of an engine running between those two temperatures?
A. 4.7% B. 5.1% C. 7.9% D. 15% E. 30%
Absorption lines due to interstellar gas
a. are wider than the lines from stars because the gas is hotter than most stars. b. are narrower than the lines from stars because the gas has a lower pressure than stars. c. indicate that the interstellar medium contains dust. d. indicate that the interstellar medium is expanding away from the Sun. e. None of the other choices are correct.
A particle whose mass is 2.0 kg moves in the xy plane with a constant speed of 3.0 m/s along the direction 
. What is its angular momentum (in kg?m2/s) relative to the point (0, 5.0) meters?
A.
B.
C.
D.
E.