A 187-pound worker carelessly decides to jump down onto a lower scaffold level 2' below the level at which he is now working. How many pounds of force in foot-pounds does he exert on the scaffolding plank?
What will be an ideal response?
374
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What is the length of the line?
A line dimensioned at 2-3/16?? is shown on a drawing with a scale of 3:1.
Pigs must be ear notched for _____, which is necessary for good record keeping
a. vaccination c. sexing b. identification d. grouping
As of December 31, 2013, how many animals were listed on the Endangered and Threatened species lists in the United States?
What will be an ideal response?
What was the longer-term impact of the “balance of power” system for nineteenth-century Europe?
a. decreased warfare between multinational empires b. increases in nationalist rebellions within multinational empires c. increased warfare between multinational empires d. decreases in nationalist rebellions within multinational empires