Atoy train of m=0.60 kg moves at 20m/s along a straight track. it bumps into another train of m=1.5kg moving in the same direction. they stick together and continue on the track at a speed 12 m/s. what was the speed in m/s of the second train just before the collision?

Atelevision set that has been running for a while heats up even the air around it. which two laws of thermodynamics could be used to analyze this scenario

How many atoms of nitrogen are in the chemical formula ni(w on

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!