Asolenoid with 1000 turns has a cross-sectional area of 7.0 cm2 and length of 25 cm. how much energy is stored in the magnetic field of the solenoid when it carries a current of 10.0 a?

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.