A man stands on a freely rotating platform with his arms extended, his rotational frequency is 0.25revls. But when he draws them in, his frequency is 0.80rev/s. Find the ratio of his moment of inertia in the first case to that in the second. A. 3.2
B. 2.3
C. 4
D. 4.7

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?

What occurs during a combustion reaction

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!