What engine is in a 1997 toyota supra aswell as a skyline r34 gtr

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

What is an aquifer for science class