Adisk rotates around an axis through its center that is perpendicular to the plane of the disk. the disk has a line drawn on it that extends from the axis of the disk to the rim. at t = 0 this line lies along the x-axis and the disk is rotating with positive angular velocity ω0z. the disk has constant positive angular acceleration αz. at what time after t = 0 has the line on the disk rotates through an angle θ

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 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

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.