Suppose that we place an aluminum cylinder, a wooden block, and a Styrofoam cup on a table and leave them there for several hours. We then come back into the room and feel each object. (a) Which (if any) feels coolest?
A. The aluminum cylinder
B. The wooden block
C. The Styrofoam cup
D. All are the same.
A. The aluminum cylinder
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Standing Sound Waves: A violin with string length 32 cm and string density 1.5 g/cm resonates in its fundamental with the first overtone of a 2.0-m organ pipe with one end closed and one end open. What is the tension in the string if the speed of sound in air is 344 m/s?
A. 1000 N B. 110 N C. 450 N D. 4100 N E. 56 N
Imagine that we put a raisin cake into the oven, with each raisin separated from the others by 1 cm. An hour later, we take it out and the distances between raisins are 3 cm. If you lived in one of the raisins and watched the other raisins as the cake expanded, which of the following would you observe?
A) All raisins would be moving away from you at the same speed. B) More distant raisins would be moving away from you faster. C) More distant raisins would be moving away from you more slowly. D) It depends: If you lived in a raisin near the edge of the cake, you'd see other raisins moving away from you, but they'd be coming toward you if you lived in a raisin near the center of the cake. E) The raisins would be expanding too, so you'd never notice any changes in the cake.
A rocket coasts in an elliptical orbit about Earth. To attain escape velocity using the least amount of fuel in a brief firing time, should it fire off at the apogee, or at the perigee? (Hint: Let Fd = ? KE guide your thinking.)
A) perigee, where it is closest and fastest B) apogee, where it is farthest and slowest C) same at either location D) same at any location
As sediments accumulate, compaction and cementation produce sedimentary rock. This process is called
A) consolidation. B) solidification. C) lithification. D) solifluction.