What phase difference between two otherwise identical traveling waves, moving in the same direction along a stretched string, will result in the combined wave having an amplitude 0.64 times that of the common amplitude of the two combining waves? express your answer in (a) degrees, (b) radians, and (c) as a fraction of the wavelength.

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.)

multiply 2kg by latent heat of vap

e/c, where e is its total energy