Combine these three velocity vectors into a resultant: 3.0 m/s north, 4.0 m/s east, 1.0 m/s west. Identify the resultant vector. O A. 13 m/s north
OB. 8 m/s northeast
OC. 4.2 m/s northeast
OD. 4.2 m/s southwest

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!