the energy would be equal to the work function at 600nm because when the wavelength is at the threshold the energy is always equal to the work function.
With what speed will the fastest photoelectrons be emitted from a surface wih threshold wavelength of 600nm when the surface is illuminated with light of wavelength of 400nm?
With what speed will the fastest photoelectrons be emitted from a surface wih threshold wavelength of 600nm when the surface is illuminated with light of wavelength of 400nm?
What is the speed and momentum of a photon with wavelength 500nm?
I found momentum by wavelength = h/p but how do I find velocity?? Please help. Thanks. I don't know how to do it without a mass.
Kristin
Is 2000MV equal to the KE then?? How do you find KE to use that to find v? ANd I have studied for a week... I just couldn't get this one problem when I was reviewing this morning.
Special Relativity I NEED HELP ASAP!
Find the speed and momentum of a proton (m=1.67*10^-27) that has been accelerated through a potential difference of 2000MV. Give your answers to three sig figs. Ans: .948c and 1.49*10^-18kg m/s
I keep trying different ways to get this, but keep getting...
Three identically charged spheres A, B, and C, each with a charge of +3.0 * 10-7 C, are located at the corners of a triangle whose sides are 30 cm long and all the angles are 60 deg. What is the net force acting on sphere A?
I figured the X coordinates cancel each other out. For the Y...
Another example on the webpage is:
A small charge is at the center of a 9.77 cm radius ball. If 8.322 E-8 N.m2/C passes through the ball's surface, how much charge is at the center?
and the answer is 749C.
I don't get this one either. I am assuming the use the same equation.