Certain neutron stars (extremely dense stars) are believed to be rotating at about 50 rev/s. if such a star has a radius of 15 km, what must be its minimum mass so that material on its surface remains in place during the rapid rotation?

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!