What is the root mean squared velocity of the nitrogen molecules in one mole of an ideal gas at a pressure of 1.50 atmospheres and a temperature of 20
? 
A. 310 m/s
B. 367 m/s
C. 425 m/s
D. 511 m/s
E. 525 m/s
D. 511 m/s
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A solid metal wire has a certain resistance. It is heated and carefully stretched to form a longer, thinner wire. After it cools, the resistance is _______ than it was before
a. greater b. less c. no more d. lighter
Molar Specific Heats: A sample of ideal monatomic gas is cooled by 50.0 C° at constant volume by removing 831 J of energy from it. How many moles of gas are in the sample? (R = 8.31 J/mol ? K)
A. 2.50 mol B. 1.50 mol C. 1.33 mol D. 1.00 mol
A negative mechanical property of ceramics is that they are ______________.
Fill in the blank(s) with the appropriate word(s).
What physical property of a star does the spectral type measure?
A) density B) luminosity C) temperature D) mass E) composition