Abicycle travels 10 km in 20 minutes. what is its average speed (in km/h) ?

If a spring has a k value of 100 newtons per meter and it is stretched 0.50 meters, what is the restoring force of the spring?

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of