Aprojectile is fired straight up with a positive velocity of 100m/s. when the projectile returns to its starting position, its velocity is?

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit:

Asher cycles 12 miles in 16 hours. what is his speed?

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy