Please help me! Two protons (mass =1.67 x 10-27 kg, charge =1.6 x 10-19 C) in a nucleus are 10-15 m apart.
If they were free to move and start from rest, find their speeds when they are 8.0 x 10-15 m apart.

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j ?

Two identical 82 mg dust particles very far apart (pee 0) are moving directly toward each other at a speed of 3698 m/s. the charge on each is-719 ? c. determine how close they will get to each other. let k = 9x109 n-m2/c2 & ignore gravity.

The step-down transformer gives a current of 10a at 24v if the primary voltage is 240v calculate the 1_primary current 2_the power input 3_the power output