a 60g tennis ball travelling at 30m/s hi a wall and bounce back at 20m/s. calculate (a)momentum of the ball before impact (b)momentum of the ball after impact​

Use the table to answer question 22 23 and 24.

What are atoms of the same element with varying number of neutrons

An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above