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23. A block is released from rest at  the top of a frictionless plane inclined at 60o with the horizontal. The incline plane is 2 m long. What is the speed of the block when it exits the incline? 

22. You measure your weight to be 699N but when you stand on a proper scale in an elevator the scale reads 490 N.  From this you can conclude that the elevator is 

24. A block is placed on a plane inclined at an angle

In the ______________, households receive goods and services and pay firms for them.  

_____________ –  a term referring to the fact that for many goods, as the level of production increases, the average cost of producing each individual unit declines. 

Refer to the graph below.  Along the Production Possibilities Frontier, the most efficient point(s) of production depicted is:

Refer to the graph below.  A change from Point A to Point B represents a(n):

Most choices involve ____________________________, which involves comparing the benefits and costs of choosing a little more or a little less of a good.

A severe freeze has once again damaged the Florida orange crop.  The impact on the market for orange juice will be a leftward shift of:

What was the source of the the electrical activity in the muscles?