In an eclectic car, the is like the gas

Which best describes how johannes kepler developed his laws of planetary motion

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Mike and mitchell decide to have a foot race. they mark off a stretch of 100 yards, and recruit cindy to work the stopwatch. after running the race and looking at the results, cindy declared that mitchell was the fastest. so how did the boys times compare?