How old is the rock
A rock contains .37 mg of Pb-206 and .95 mg of U-238. The half lifeof the decay series U-238 to Pb-206 is 4.5 X 109years.Assuming no Pb-206 was present in the rock initially, how old is the rock?
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Calculate the total energy of the child-stick-Earth system, taking both gravitational and elastic potential energies as zero for x = 0.
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A 1.2 kg block is initially at rest on a horizontal frictionless surface when a horizontal force in the positive direction of an x axis is applied to the block. The force is given by F(x) = (2.5 - x2)i N, where x is in meters and the initial posit
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Find the equillibrium point, the consumer's surplus, and the producer's surplus if the demand function is p(x)=f(x)=200-.4x^2.
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