The diagram shows the muzzle of a cannon located 40 m above the ground. When the cannon is fired, a ball leaves the muzzle with an initial horizontal speed of 150 m/s. 40 m
How long will the cannonball be in the air before it hits the ground?

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?

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.

True or false graphs must include scales that increase by the same amount