An NFL place kicker is practicing his extra-point kicks. He kicks the football into the wall of his living room and it hits at a speed
of 83 mph (or 37.1 m/s). If the wall did not move at all, how fast
would the ball bounce back? (Assume a perfectly elastic
collision and ignore friction.)
Note: Type your answer as m/s

How many molecules are present in 3 mols of silicon dioxide (sio2)?

The 10-kg double wheel with radius of gyration of 125mm about o is connected to the spring of stiffness k = 600 n/m by a cord which is wrapped securely around the inner hub. if the wheel is released from rest on the incline with the spring stretched 225 mm, calculate the maximum velocity v of its center o during the ensuing motion. the wheel rolls without slipping

What is the scientific definition of energy that relates to work