What are your physics midterm tips?

If a star is moving toward earth, it is

An astronaut on the moon throws a baseball upward. the astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 3030 ft per sec. the height s of the ball in feet is given by the equation s equals negative 2.7 t squared plus 30 t plus 6.5s=−2.7t2+30t+6.5, where t is the number of seconds after the ball was thrown. complete parts a and b.

You have 80 g of 60oc water and 80 g or 10oc water. what is the final temperature when the two are mixed? explain.