what is the origin of the engery liberated in an exothermic reaction? I've been hitting the books for this but can't find it. Seems simple enough though. I just need to be sure.
I missed the material for these couple of problems. If someone could help explain how to solve them I would much appreciate it. :cool:
1.) A charge of +2 x 10^-6 C is 20cm from a charge of -3 x 10^-6 C. Find the magnitude and direction of the force on each charge.
2.) A 120-V electric...
I was running through some problems, doing just fine, until I came across these two. I can't work out a correct solution. :cry:
1) A 1-kg block of ice at 0 C falls into a lake whose water is also at 0 C, and 0.01 kg of the ice melts. What was the minimum altitude from which the ice fell...
Should be fairly simple, but I'm not so great with physics. Here's a few I'm having trouble with...
1. Under what circumstances (if any) is no work done on a moving object even though a net force acts upon it?
2. What happens to the momentum of a car when it stops?
3. When the...