A 212-pound worker slips on a sloping roof, free-falling 8' before contacting the safety guardrail. How many pounds of force in foot-pounds did the worker exert on the safety guardrail?
What will be an ideal response?
1,696
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Mechanical drawings have been used ____.
A. since the 1900's B. for years C. for decades D. for centuries
Most of the immigrants who first came to the New World were industrialists
Indicate whether the statement is true or false.
What is included under the definition of fossil fuels?
What will be an ideal response?
Answer the following statement(s) true (T) or false (F)
1. Nearly all commercial, industrial, and residential power circuits are connected in parallel. 2. The total (line) current for an ac parallel circuit may not be equal to the arithmetic sum of the current in each of the branch circuits. 3. The power factor of the circuit is found by the use of the expression: PF = P + VI. 4. The apparent power or volt-amperes of the circuit can be determined by multiplying the applied voltage by the total current. 5. The amount of reactive power or VARs (volt-amperes-reactive) can be determined using the formula: VARs = P/VA.