Abicycle travels 15 km in 30 minutes. what it's is average speed in km per hour

Explain in physical terms how a microwave oven works. what would happen when you put a conductor in the microwave oven? explain.

Ben(55 kg) is standing on very slippery ice when junior(25kg) bumps into him. junior was moving at a speed of 8m/s before the collision and ben and junior embrace after the collision. find the speed of ben and junior as they move across the ice after the collision .

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is