A block of solid copper sits on a flat, level table. Copper has a density of 8.94 ✕ 103 kg/m3. The mass of the block is 20.4 kg.

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

Idon’t quite understand this problem

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.