Arock at rest falls off a tall cliff. what is the rock's velocity as the rock hits the ground 3.5 s later? ignore air resistance

The slope of a good speed time indicates ? a. velocity b. acceleration c. direction d. speed

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!

What is the single most important equation in all of physics?