A 0.75 kg ball moving at 3.9 m/s to the right collides head-on with an identical ball moving at 3.9 m/s to the lift in a perfectly inelastic collision. Find the common velocity of the balls and the decrease in kinetic energy during the collision.

Astudent looks at ocean waves coming into the beach. an ocean wave with more energy will a) have a greater height. b) have a greater period. c) travel toward the beach faster. d) strike the beach with greater frequency.

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest