If electricity costs 6.00¢/kWh (kilowatt-hour), how much would it cost you to run a 120 W stereo system 4.0 hours per day for 4.0 weeks?
A) $0.81
B) $0.12
C) $1.38
D) $2.27
A
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The index of refraction of diamond is 2.42. This means that a given wavelength of light travels
A) 2.42 times faster in air than it does in diamond. B) 2.42 times faster in diamond than it does in vacuum. C) 2.42 times faster in vacuum than it does in diamond. D) 2.42 times faster in diamond than it does in air. E) 2.42 times faster in vacuum than it does in air.
Avogadro's number is related to the universal gas constant R and the number of moles n by:
a. NA = Rn b. NA = R/n c. NA = n/R d. Avogadro's number cannot be related to these two quantities alone.
The molecular weight of carbon dioxide is 44.0 g/mol. What is the internal energy in 3.00 kg of carbon dioxide at 300 K? As an approximation, treat the carbon dioxide gas as if it was monatomic
A) 2.55 × 105 J B) 1.70 × 105 J C) 2.55 × 104 J D) 1.70 × 104 J E) 1.70 × 106 J
Strictly speaking, Newton's law of universal gravitation, F = Gm1m2/r2, is valid only if the masses are either point masses or ________.
What will be an ideal response?