The performance per unit cost for stiffness of a plate in bending that is not weight critical is given by
(a) E/CV
(b) E?/CV
(c) E½/CV
(d) E?/CV
(d) E?/CV
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A(n) ____________________ is the largest known structure in the universe
Fill in the blank(s) with correct word
Which of the following best describes the current status of the debate over evidence for life in the Martian meteorite ALH84001?
A) Most scientists now agree that the meteorite shows clear evidence of past life on Mars. B) Most scientists now agree that the meteorite shows no evidence for past life on Mars. C) Most scientists agree that the evidence would support life if the meteorite truly comes from Mars, but few scientists accept that the meteorite is from Mars and instead think it is an ordinary Earth rock. D) Most scientists find the evidence intriguing but suspect that it can be explained without requiring past life on Mars.
You and your friend want to go to the top of the Eiffel Tower. Your friend takes the elevator straight up. You decide to walk up the spiral stairway, taking longer to do so
Compare the gravitational potential energy (U) of you and your friend, after you both reach the top. A) It is impossible to tell, since the times are unknown. B) It is impossible to tell, since the distances are unknown. C) Your friend's U is greater than your U, because she got to the top faster. D) Both of you have the same amount of potential energy. E) Your U is greater than your friend's U, because you traveled a greater distance in getting to the top.
The most characteristic feature of sedimentary rocks is that they are
A) observed in great thicknesses. B) formed in layered sequences-strata. C) fossiliferous. D) made from unconsolidated sediments.