karen is running forward at a speed of 9m/s. She tosses her sweaty headband backwards at a speed of 20m/s. The speed of the headband ,to the nearest whole number relative

When you turn on a battery-operated device, an electrical circuit is

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

The ozone hole appears in antarctica during