Recent content by ZEli

I'm not sure why you're asking me that. I just copy and pasted the question.

Homework Statement You need to melt a 0.50 kg block of ice at -10 °C in a hurry. The stove isn't working, but you do have a 50 V battery. It occurs to you that you could build a capacitor from a couple of pieces of sheet metal that are nearby, charge the capacitor with the battery, then...

Ohh, I forgot to convert grams into kg. Thank you for all the help!

Hmm, it's still not quite right. I have the two equations, .74 = .5*m1*v1^2 + .5m2*v2^2 and 2*v1 = 4*v2. I solved for v1, giving me v1 = 2*v2. Plugging into the first equation I end up with v2 = .35 and v1 = .70. I understand that all potential energy turns into kinetic energy and that energy...

So, .74 = 1/2mv^2. I picked the 2g sphere, so v = .86 m/s. This doesn't give me the right answer :(

Homework Statement Two small metal spheres with masses 2.0g and 4.0g are tied together by a 5.4-cm-long massless string and are at rest on a frictionless surface. Each is charged to +2.1 μC . The string is cut. What is the speed of each sphere when they are far apart? Homework Equations...

Ohhhhh, I see. So since there are 6 faces of the cube, I would multiply the given flux by 6 and then multiply by ε. Got the right answer! Thanks!

Homework Statement The electric flux through each face of a 4.50m x 4.50m x 4.50m cube is 130Nm^2/C . How much charge is inside the cube? Homework Equations Electric Flux = E*A = Qin/ε The Attempt at a Solution I know electric flux is given, 130Nm^2/C and I'm trying to solve for...