Two identical small metal spheres are separated by 1.00 x 10^5 m and exert an 18.9 n repulsive force on each other. a wire is connected between the spheres and then removed. the spheres now repel each other, exerting 22.5 n force. assume both charges are positive. a)determine the total charge of this systemb)determine the charges of the spheres before the connection

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation2: 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 energy added you so much!