Sound waves are ___ waves & must have a medium to travel through

A 50 g tennis ball travels at a velocity of 15 m/s, hits a basketball with a mass of 600 g that is stationary on a frictionless surface and then rebounds back in the opposite direction with a velocity of - 6 m/s.

When going from an optically less dense medium to a more optically dense medium (such as air to water), how does the angle of incidence compare with the angle of refraction? Does the light bend towards or away from the normal?

What is the name of this insect and what is it's charteristics

What is the net force on an object when you combine a force of 10n north with a force of 5n south?

An initially stationary electron is accelerated by a uniform 640 N/C Electric Field. a) Calculate the kinetic energy of the electron after it has traveled 15 cm in a direction parallel to this field.

When is a body said to be at rest

27. Calculate the impulse when an average force of 10 N acts on a cart for 5.0 s.

A boy on a bicycle is resting at the top of a hill then he rides his bicycle down the hill describe how the boy potential and kineti energy differ at the top middle and bottom of the him

What is the displacement and distance if I walk 8 blocks north, 9 blocks west and 10 blocks south

What investigations provide large amounts of information about a wide range of variables.