Given the differences in size and composition of the jovian planets in our solar system, how many groups is it appropriate to sort them into?
A) one
B) two
C) three
D) four
B
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A gasoline engine absorbs 2500 J of heat at 250°C and expels 2000 J at a temperature of 50°C. What is the magnitude of the change in entropy (in J/K) for the system?
A. 6.2 B. 4.7 C. 1.4 D. 10.9 E. 3.2
Interstellar dust consists mostly of ________
A) the same tiny particles found in household dust B) tiny grains of water ice C) ozone "smog" D) microscopic particles of carbon and silicon E) hydrogen and helium atoms
Based on what we know about our own solar system, the discovery of hot Jupiters came as a surprise to scientists because these planets are __________.
Fill in the blank(s) with the appropriate word(s).
An incandescent lightbulb is rated at 100 watts when plugged into a 110 V rms household outlet. Calculate the resistance of the filament and the rms current
a. 12.2 ?, 0.91 A (rms) b. 10 ?, 1.0 A (rms) c. 110 ?, 1.0 A (rms) d. 121 ?, 0.91 A (rms) e. 11 ?, 1.1 A (rms)