A friend wants to know whether her wedding ring is made of pure gold or of a mixture of gold and silver. a)Describe an investigation to answer her question.

b)Explain what is likely to be the most significant source of error in your answer.

The density of gold is 19.3g/cm and the density of silver is 10.5g/cm

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

a. spokes of a wheel.

as indicated in the question radial contains rad, also found in radius, so the fracture's would span the radius.