Which wave, A or B, has lower energy? 1. A, because it has a higher amplitude
2. B, because it has a higher amplitude
3. A, because it has a lower amplitude
4. B, because it has a lower amplitude

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

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.

Madison pushes with a 210-n horizontal force on a 24-kg crate of coffee resting on a warehouse floor. the force of friction on the crate is 74 n. what is the acceleration?