In which of the following is convection the main type of heat transfer? O A. Gas and vacuum
B. Solid and liquid
O C. Liquid and gas
O D. Solid and vacuum

Natural forces that can alter ecosystems include seasons and climate changes. t or f

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 equation2: 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!

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?