The average sound level is 70 dBA, and the threshold of pain is reached at _____ dBA
a. 80 dBA
b. 100 dBA
c. 130 dBA
d. 150 dBA
c
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One side of a square is 14” long. Calculate the perimeter of the square, in inches.
What will be an ideal response?
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All species of hermit crabs _____
a. must return to the ocean to breed b. lay eggs in sand c. can be bred in captivity d. are vertebrates with an endoskeleton
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The combination of two or more metal elements is called a(n) ____________________
Fill in the blank(s) with the appropriate word(s).
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If compared to dry friction clutches, wet friction clutches:
A. wear faster. B. dissipates heat better. C. will slip more. D. all of the above.
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