Recent content by aimeemarie

I can't believe I didn't think to add them together, thank you :)

Hello out there! I am having trouble figuring out how to set this up: A helium nucleus (charge +2e) moves through a potential difference V = −0.70 kV. Its initial kinetic energy is 3.80 10-16 J. What is its final kinetic energy? I feel like I should be using 1/2 mv^2=qV or E=qv. I feel...