Agolfer hits a 0.05 kg golf ball with an impulse of 3 n-s what is the change in velocity of the ball

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?

If steel is more dense that lake water, why can a boat float

How are series and parallel circuits simililar? both have multiple paths for electrons to travel. both require resistors in their circuits. both require a switch to complete the circuit. both have at least one path for electrons to travel.