A concave mirror forms a real image at the same position of the object, if the object is at 20cm away from the mirror then, (a) find the focal length of the mirro r(b) If the object is moved 5cm towards the , what will be the position of the image

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!