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.
Given one focus at (4,2) and the equation of one directrix as y=4, determine the equation of the ellipse with an eccentricity of 1/2.
a) what is the average acceleration of the bullet thru the board? b) what is the total time the bullet is in contact with the board? c) What thickness of the board would it take to stop the bullet, assuming acceleration is the same?
Use the information developed in the notes for formic acid as a guide to determine the concentration of [H+] and pH of 0.1N and 1N solutions of acetic acid.
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
Determine the tax per item that will maximize the total tax revenue and use it to compute the maximum total tax revenue possible.
Consider light that is refracted by a prism shaped like an equilateral triangle. The incident ray is parallel with the prism's base. What is the total deflection of the ray, given that the index of refraction of the prism material is 1.50 ?
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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