A stone is dropped from the roof of a building; 2.00 s after that, a second stone is

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

Introductory Chemistry 5
For the reaction shown, find the limiting reactant for each of the initial quantities of reactants. \(4 \mathrm{Cr}(s)+3 \mathrm{O}_{2}(g) \longrightarrow 2 \mathrm{Cr}_{2} \mathrm{O}_{3}(s)\) (a) \(1 \mathrm{~mol} \mathrm{Cr} ; 1 \mathrm{~mol} \mathrm{O}_{2}\) (b

Classical Mechanics 0
Consider the cube balanced on a cylinder as described in Example 4.7 (page 130). Assuming that b < r, use the Lagrangian approach to find the angular frequency of small oscillations about the top. The simplest procedure is to make the small-angle approximations to before you differentiate to get Lagr

Organic Chemistry 7
a. Which of the following has a nonpolar covalent bond? b. Which of the following has a bond closest to the ionic end of the bond spectrum? \(\mathrm{CH}_{3} \mathrm{NH}_{2}\) \(\mathrm{CH}_{3} \mathrm{CH}_{3}\) \(\mathrm{CH}_3\mathrm{F}\) \(\mathrm{CH}_{3} \mathrm{OH}\)

Chemistry 11
When ammonium nitrite (\(\mathrm{NH}_{4} \mathrm{NO}_{2}\)) is heated, it decomposes to give nitrogen gas. This property is used to inflate some tennis balls. (a) Write a balanced equation for the reaction. (b) Calculate the quantity (in grams) of \(\mathrm{NH}_{4} \mathrm{NO}_{2}\) needed

Social Psychology 8
In experiments on obedience, most participants who were ordered to administer severe shocks to an innocent person refused to do so.

Urban Economics 8
Consider the example shown in Figure 139 . The initial net return is $70 in each activity, and there are 20 people in each activity. Suppose that instead of increasing the burglary penalty, we decrease the net return to lawful activity by half. This change is represented by a downward shift by $35 of

Introductory Chemistry: A Foundation 9
Explain, in terms of the kinetic molecular theory, how an increase in the temperature of a gas confined to a rigid container causes an increase in the pressure of the gas.