A skateboarder rolls off the top of a staircase horizontally and lands at the bottom of the stairs. If the height of the stairs is 12 meters and his initial speed was 10 m/s. How long was the skateboarder airborne?

Which statement about covalent bonds is true

Excuse ! extra points plus ! super desperate ! the position of an object does not move relative to a reference point. relative to the reference point the object _. a.) is not moving. b.) is moving.

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.