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A system of pulleys is used to raise a load of 1000N. When the applied effort of 250N moves through 10m, the load rises through
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the half-life of an element x is is 5 days, if we have 5g of x initially, what is the mass x after 20 days
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the half-life of an element x is is 5 days, if we have 5g of x initially, what is the mass x after 20 days
