. Mass 1 has a momentum of 20 kg*m/s. Mass 2 has a momentum of 50 kg*m/s. They have a perfectly elastic collision. After the collision, the momentum of Mass
1 is 15 kg*m/s. What is the momentum of Mass 2?

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly