Quantum P.Set hints for the trickier problems for AP student Cutnell Textbook
8. find Ek . hf = W + Ek. get f, wavelength =c/f
10. EPE = kqq(1/d-1/d) find f (EPE=hf) wavelength =c/f
14. p=h/wavelength gives f=pc/h
28 Ek in eV has same magnitude as V in volts. find v (speed) using Ek, wavelength =h/(mv)
40. for photon E=hf
for electron E= Ek find v, then wavelength= h/(mv)