Two metal spheres carry a charge and exert an electric force on each other. Sphere A carries 2n more surplus charge than sphere B, where n is an amount of charge of an integer number of electrons. The two spheres are brought into electrical contact and then returned to their initial separation.

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.

Aspaceship starting from a resting position accelerates at a constant rate of 9.8 meters per second per second. how far will the spaceship travel if its final speed is 1 percent the speed of light (300,000,000 m/s)? a. 3.1 × 106 m b. 2.94 × 108 m c. 7.8 × 1010 m d. 4.6 × 1013 m

What does every magnet possess? a. iron metal b.strong magnetic field c.repulsion d.north and south poles