An exceptional standing jump would raise a person $0.80 \mathrm{~m}$ off the ground. To do this, what force must a $68-\mathrm{kg}$ person exert against the ground? Assume the person crouches a distance of $0.20 \mathrm{~m}$ prior to jumping, and thus the upward force has this distance to act over before he leaves the ground.

Match each lettered definition with the correct numbered item at right. a. Leader of the Radical Republicans 1. sharecropping 2. Hiram Revels 3. scalawags 4. Southern Homestead Act 5. Andrew Johnson 6. carpetbaggers 7. Compromise of 1877 8. Freedmen's Bureau 9. Ku Klux Klan 10. Thaddeus Stevens

Which of the following is true of the Clean Air Act?

A) It is the only major state law regulating air pollution in the United States.
B) It fails to include the air pollution caused by fuel and fuel additives in its purview.
C) It is only concerned with stationary sources of air pollution.
D) It requires air pollution controls to be installed on motor vehicles

Predict whether each of the following elements will act as a donor or an acceptor when added to the indicated semiconducting material. Assume that the impurity elements are substitutional.

$$\begin{matrix}\text{Impurity} & \text{Semiconductor}\\\text{N} & \text{Si}\\\text{B} & \text{Ge}\\\text{S} & \text{InSb}\\\text{In} & \text{CdS}\\\text{As} & \text{ZnTe}\\\end{matrix}$$

A 3-kg slender bar is rigidly attached to a 2-kg thin circular disk. At $t=0$, the composite object is stationary and is subjected to the moment $\Sigma \mathrm{M}=-101+10 \mathrm{~J}(\mathrm{~N}-\mathrm{m})$ about its center of mass. No other forces or couples act on the object. Determine the object's angular acceleration at $t=0$.

In Act V, Scene I, lines 100-118, what action does Brutus say he will refuse to take and what situation will he not permit? (b) interpret: What explanation does Brutus give for his position? Explain. (c) Draw Conclusions: What do Brutus' statements suggest about his beliefs and values? Explain.

There are six 3 by 3 permutation matrices P. What numbers can be the determinants of P? What numbers can be pivots? What numbers can be the trace of P? What four numbers can be eigenvalues of P?

Let f(x)=b+mx.

(a) Can f(x) be even? How?

(b) Can f(x) be odd? How?

(c) Can f(x) be both odd and even? How?

Volume of Chondroitin Sulfate in Solution

One critical function of chondroitin sulfate is to act as a lubricant in skeletal joints by creating a gel-like medium that is resilient to friction and shock. This function seems to be related to a distinctive property of chondroitin sulfate: the volume occupied by the molecule is much greater in solution than in the dehydrated solid. Why is the volume so much larger in solution?

Evaluate Impact of Eighteenth Amendment

Write a paragraph evaluating the impact of Prohibition. Consider how people got around the Volstead Act, what the data above indicates about the effects of Prohibition, and how Congress eventually dealt with the Eighteenth Amendment. What were the unintended consequences of Prohibition? In your opinion, was the "noble experiment" worth the costs?

Which of the following combinations would act as buffered solutions?

a. $\mathrm{HCl}$ and $\mathrm{NaCl}$
b. $\mathrm{CH}_3\mathrm{COOH}$ and $\mathrm{KCH}_3 \mathrm{COO}$
c. $\mathrm{H}_2\mathrm{S}$ and $\mathrm{NaHS}$
d. $\mathrm{H}_2\mathrm{S}$ and $\mathrm{Na}_2\mathrm{S}$

Determine whether a tort has been committed in each situation below. If there is a tort, is it an intentional wrong, an act of negligence, or an activity for which strict liability should be imposed? Explain.

Mr. Slifko buys a strong painkiller at the drugstore and takes the capsules according to the directions on the package. He has an extremely bad reaction to the drug and has to be taken to the hospital.

An entertainer juggles balls while doing other activities. In one act, she throws a ball vertically upward, and while it is in the air, she runs to and from a table $5.50$ m away at an average speed of $3.00$ m/s, returning just in time to catch the falling ball.
(b) How high above its initial position is the ball just as she reaches the table?

Terms and People For each item below, write a sentence explaining its significance:

$\bullet$ Reconstruction

$\bullet$ Radical Republican

$\bullet$ Wade-Davis Bill

$\bullet$ Freedmen's Bureau

$\bullet$ Andrew Johnson

$\bullet$ black code

$\bullet$ Civil Rights Act of 1866

$\bullet$ Fourteenth Amendment

$\bullet$ impeach

$\bullet$ Fifteenth Amendment