What causes the moon's phases? a. the rotation of the moon on its axis b. the position of the moon each month in relation to the north star c. changes in how much of the sunlit side of the moon faces earth. d. earth's tilt on its axis as it revolves around the sun

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.

What energy transformations occur each time the skateboarder rolls up the ramp?