A1.11 kg skateboard is coasting along the pavement at a speed of 6.82 m/s when a 0.880 kg cat drops from a tree vertically downward onto the skateboard. what is the speed of the skateboard-cat combination? answer in units of m/s.

The consumption of fossil fuels could be

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 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 energy added you so much!

The energy equivalent of the rest mass of an electron is