In a paragraph of no less than five sentences, explain how these russian nesting dolls are a good analogy for the strongest magnet in the world. remember to use proper grammar and mechanics when writing your paragraph

Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

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? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final