Describe why drawing a line of best fit is useful.

The total amount of energy contained in an object

James joule carefully measured the difference in temperature of the water at the top and bottom of a waterfall. why did he expect a difference

You fire a bullet into a 3 kg wooden block attached to a spring with spring constant 70 n/m. when the bullet strikes the block, the spring compresses. the bullet has a mass of 0.03 kg and strikes the block with a speed of 200 m/s. what is the speed of the block and bullet when they first start moving together?