Circle each preposition and underline each prepositional phrase. Shepard, the first American in space, spent fifteen minutes there.

The electric field in an $EM$ wave traveling north oscillates in an east-west plane. Describe the direction of the magnetic field vector in this wave. Explain.

Consider two people, one on the earth 's surface at the equator and the other at the north pole. Which has the larger centripetal acceleration? Explain.

American and Japanese workers can each produce 4 cars a year. An American worker can produce 10 tons of grain a year, whereas a Japanese worker can produce 5 tons of grain a year. To keep things simple, assume that each country has 100 million workers.

{a) Identify Which groups in the North were opposed to abolition? Why?

{b} Identify Alternatives How might the concerns of these groups have been calmed?

An airplane is 160 miles north and 85 miles east of an airport. The pilot wants to fly directly to the airport. What bearing should be taken?

Create a list of images, symbols, and actions that would be included if a painting titled American Progress were to be created in 2020.

How would you expect immigration by primarily low-skill workers to affect American low-skilled workers?

A ship leaving port sails for 125 miles in a direction $20^{\circ}$ north of due east. Find the magnitude of the vertical and horizontal components.

A pedestrian walks 6.0 km east and then 13.0 km north. Use a graphical method to find the pedestrian's resultant displacement and geographic direction.

Answer: If you were the chief of a Native American nation, would this speech encourage you to join the Confederation? Justify.

(a) Define: How would you sum up Cr$\grave{e}$vecoeur's definition of an American? (b) Analyze: Does Cr$\grave{e}$vecoeur's definition still hold true today? Discuss. (c) Take a Position: Do you think that there can be a single definition of an American? Why or why not?

The number of children in an American family is a random variable with mean 2 . For this random variable, which will be greater: the median or the mean?

At one time the production of American manufacturing was estimated to be $P=2.39 L^{0.76} K^{0.24}$. Find P(2500, 450).