Which of the following are needed to determine how long an object is in projectile motion? tell me all that apply. a. the initial velocity of the object b. the mass of the object c. the horizontal distance the object travels as it falls d. the vertical distance the object travels as it falls

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.