02:26
Beneath the Surface: Water and the Speed of Sound
Sound in the ocean travels about five times as fast as it does in the atmosphere. As with light, absorption plays a major role.
07:34
Compound Denominate Numbers: Compound Units
This clip presents several practical problems involving compound units. The problems include calculating a car's speed in miles per minute; the number of gallons of gas used; the force per square foot exerted by a waterbed; and the speed of sound ex...