One car moving in a straight line covers one third distance in 20km/h and rest in 60km/h . find the average speed

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

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!