How much heat (in kcal) must be removed to make ice at ?10°C from 2 kg of water at 20°C? (The specific heat of ice is 0.50 cal/g/°C.)
a. 190
b. 200
c. 240
d. 210
e. 50
d
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Giant and supergiant stars are rare because
a. they do not form as often as main-sequence stars. b. the star blows up before the giant or supergiant stage is reached c. the giant or supergiant stage is very short. d. the giant or supergiant stage is very long
When a 4-?F capacitor has a potential drop of 20 V across its plates, how much electric potential energy is stored in this capacitor?
A) 0.8 ?J B) 8 ?J C) 80 ?J D) 800 ?J E) 8000 ?J
The _____________strength of a brittle or composite material is the maximum tensile stress determined from a three-point bend test.
Fill in the blank(s) with the appropriate word(s).
Series/Parallel Circuits: A 6.0-? and a 12-? resistor are connected in parallel across an ideal 36-V battery. What power is dissipated by the 6.0-? resistor?
A. 220 W B. 48 W C. 490 W D. 24 W