A mechanic can lift cartons a vertical distance of 1 m, or roll them up a 2-m-long ramp to the same elevation. With the ramp, the applied force needed is
A. half as much.
B. twice as much.
C. the same.
D. none of the above
Answer: A
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The bob at the end of a vertical spring vibrates up and down once every 2 s. Its frequency is
A. 2 Hz. B. more than 2 Hz. C. 0.5 Hz. D. none of the above
When compared to land, how does water heat?
A. more slowly B. more slowly at first, and then more quickly C. more quickly D. at same rate
Maritime air masses form over landmasses
Indicate whether the statement is true or false
The price consumers are willing to pay for a resource that may be limited depends on ________
A) their perceived need for the resource B) how much they can afford at a time the resource is limited C) their ability to pay more than someone else D) their access to the resource in their community E) how much of the resource is remaining to purchase