Thermal Physics - Multiple Choice Model Questions I

Suppose you flip 50 fair coins. Which of the following sentences is wrong?

• The most likely macrostate is getting 25 tails and 25 heads

• The probability of getting exactly 30 heads is 4.2%

• The probability density for the number of heads obtained is well approximated by a Gaussian (normal) distribution with equal mean and standard deviation

What is approximately the mass of 1 mole of protons?

• 1 g

• 1 kg

• It depends on the element to which the protons belong

For the following probability distributions, it is false that...

• ...the standard deviation for probability distribution (b) is bigger

• ...the variance for probability distribution (a) is bigger

• 568 m/s

• 3321 m/s

• 1928 m/s

• 146 m/s

What is the kinetic energy density of a gas at a pressure of 3 atm?

• It depends on its temperature

What is the probability of getting 3 times "2" when throwing a fair six-sided die 5 times?

The approximate value of 1000! is...

Which of the following sentences is true?

• In a gaseous system, fluctuations in pressure become negligible as the number of particles contained becomes very big

• The temperature is a measure of the mean energy of the atoms/molecules conforming an object

• All microstates being equally likely does not imply that different macrostates are equally likely

• All other answers are correct