Five moles of an ideal gas expands isothermally at 100°C to five times its initial volume. Find the heat flow into the system
a. 2.5 × 10^4 J
b. 1.1 × 10^4 J
c. 6.7 × 10^3 J
d. 2.9 × 10^3 J
e. 7.0 × 10^2 J
a
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According to current understanding, the first generation of stars in the universe ________ than differ stars born today.
A) were much more massive B) contained much more hydrogen and helium C) were much cooler in temperature D) were much more likely to be members of binary star systems
If the solubility of a compound is 72 grams per liter, how many grams of the compound will dissolve in 0.50 liters?
A) 36 g B) 72 g C) 144 g D) 30 g E) none of the above
The magnitude of a displacement is ______________ the magnitude of the distance traveled
a. always unequal to b. less than or equal to c. always equal to d. greater than or equal to e. none of these; the two cannot be compared.
Superguy is flying at treetop level near Paris when he sees the Eiffel Tower elevator start to fall (the cable snapped). His x-ray vision tells him Lois LaTour is inside. If Superguy is 1.00 km away from the tower, and the elevator falls from a height of 230 m, how long does Superguy have to save Lois, and what must be his average speed?
a. 4.84 s, 206 m/s b. 8.39 s, 119 m/s c. 6.85 s, 150 m/s d. 9.69 s, 103 m/s e. 3.43 s, 292 m/s