You are rolling on a skateboard with a constant velocity of 12 m/s. as you are moving you toss a baseball straight up into the air with a vertical speed of 25 m/s. how long will it take the ball to land back in your hand? how high will the ball go before it falls back down?

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

Which of these is not a possible type of energy transformation? a. electrical energy into light energy b. sound energy into nuclear energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

Current from a charged capacitor lights a bulb. as time goes on the brightness of the