An exoplanetary system has two known planets. planet x orbits in 290 days and planet y orbits in 145 days. which planet is closest to its host star? if the star has the same mass as the sun, what is the semi-major axis of the orbits for planets x and y?

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!