A roofer needs to get a stack of shingles onto a roof. Pulling the shingles up manually uses 1,549 n of force. The roofer decides that it would be easier to use a system of pulleys to raise the shingles. Using the pulleys, 446 n are required to lift the shingles. What is the mechanical advantage of the system of pulleys? Explain your answer
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Which symbols below represent the ions found in the glass of water ? a. oh- and h+ b. co2 and o2 c. o2 and h2 d. nh3- and h+
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Which statement is a physical property? becomes moldy quicklyeasy to digestconducts electricity poorlydoes not burn
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Producing disposable grocery bags consumes resources. recycling disposable bags is a solution that can recover some of the resources used to make new bags. which of the following behaviors could further refine the solution? a. disposing of bags by burning them b. reusing bags whenever possible c. using bags at once so that they do not break d. using only nonrenewable materials to make new bags subject is environmental science for apex users
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Biology, 22.06.2019 12:10
What would most likely happen to a unicellular organism if it was exposed to a hypotonic solution for an extended period of time?
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A roofer needs to get a stack of shingles onto a roof. Pulling the shingles up manually uses 1,549 n...
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