What does the churning air in the troposphere determine

The roller coaster from problem #1 then tops a second hill at 15.0 m/s, how high is the second hill? 91.5 m 79.2 m 80.0 m 68.5 m

Which situation will have the highest resistance? a.long wire and high temperatureb.short wire and high temperaturec.long wire and cold temperaturedshort wire and low temperature

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest