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Elementary Statistics 12
Trifecta In horse racing, a trifecta is a bet that the first three finishers in a race are selected in the correct order. In a race with 12 horses, how many different trifecta bets are possible? If you randomly guess the order of the first three finishers in a race with 12 horses, what is the probabi

An Introduction to Thermal Physics 1
Problem 35P According to the Sackur-Tetrode equation, the entropy of a monatomic ideal gas can become negative when its temperature (and hence its energy) is sufficiently low. Of course this is absurd, so the Sackur-Tetrode equation must be invalid at very low temperatures. Suppose you start with a s

College Physics 1
Problem 2PE (a) When rebuilding her cars engine, a physics major must exert 300 N of force to insert a dry steel piston into a steel cylinder. What is the magnitude of the normal force between the piston and cylinder? (b) What is the magnitude of the force would she have to exert if the steel parts

Probability and Statistics for Engineering and the Sciences 9
Problem 32E Fire load (MJ/m2)is the heat energy that could be released per square meter of floor area by combustion of contents and the structure itself. The article Fire Loads in Office Buildings (J. of Structural Engr., 1997: 365368) gave the following cumulative percentages (read from a graph) f

Physics for Scientists and Engineers with Modern Physics 9
Why is the following situation impossible? In the Bohr model of the hydrogen atom, an electron moves in a circular orbit about a proton. The model states that the electron can exist only in certain allowed orbits around the proton: those whose radius r satisfies r 5 n2 (0.052 9 nm), where n 5 1, 2, 3

Quantitative Chemical Analysis 8
Consider the titration of 25.00 mL of 0.082 30 M KI with 0.051 10 M AgNO3. Calculate pAg at the following volumes of added AgNO3: (a) 39.00 mL; (b) Ve; (c) 44.30 mL.

Urban Economics 8
The Price Effects of Vouchers and Recipient Welfare Using Figure 154 as a starting point ( v is the voucher point and j is the publichousing point), suppose the $300 program increases the price of housing, from $1 to $1.50 per unit of housing. a. Draw the voucher budget line with a housing price of $

Foundations of Sport and Exercise Psychology 7
Discuss three strategies for on-site reductions in anxiety and tension.