Atoy robot is programmed to move in a straight line across a desktop according the equation x=-(11/15t^3) + 3.1t, where x is in inches and t is in seconds. at some point during the trip across the desktop, the robot is at rest. what is the robot's acceleration at this point? select one: a. −3.5 in / s2 b. 11 in / s2 c. −5.3 in / s2 d. 13 in / s2

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!