Joseph is late for school. His homeroom is on the 4th floor so he runs upstairs so he's not marked late. He tells his homeroom teacher. I'm here!" while trying to catch his breath
A. Identify 2 body systems Joe used in this situation
B. Explain how those 2 body systems worked together to get him to homeroom on time.

In a heat engine of 1000 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 inital energy was 2000 j we have to do all of these down here 1)write the equation 2)list out your know variables 3)plug the numbers into the equations 4)solve 5)write your solution statemtn that includes inital energuy and final energuy added

Volume is a measurement of how fast particles of a substance are moving

Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?