A man picks up a 50 pound box three feet above the grounD. How much work is being done?
A. 16.7 ft-lb
B. 0 ft-lb
C. +50 ft-lb
D. +150 ft-lb
D
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Dynamic braking circuits for alternating current motors generally include a(n) ______________________________ to lower the voltage to the rectifier.
Fill in the blank(s) with the appropriate word(s).
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Two refrigerants exempted from the EPA requirement to recover, recycle, and reclaim are _____.
a. ammonia and carbon dioxide b. ammonia and hydrogen sulfide c. carbon dioxide and hydrogen sulfide d. hydrogen sulfide and butane
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Shoulderless eyebolts can be used to make _____
a. vertical lifting pulls only b. angled lifting pulls only c. vertical and angled lifting pulls d. vertical lifting pulls and angled lifting pulls up to 45 degrees
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Define "subcooling."
What will be an ideal response?
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