a 3kg flower pot sits on a window ledge 1.8m above the ground. It is. knocked off the ledge and hits the ground. What is its kinetic energy before it hits the ground?

How many molecules are present in 3 mols of silicon dioxide (sio2)?

Could someone . i have tried to solve myself but my calculation is off

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final