What effect causes a planet's mean temperature to be hotter than we'd expect based solely on its distance from its star

What is the measure of a change in an objects velocity?

Two students, each riding bicycles, start from the same apartment building and ride to the same building on campus, but each takes a different route. the first student rides 1100 m due east and then turns due north and travels another 1430 m before arriving at the destination. the second student heads due north for 1930 m and then turns and heads directly toward the destination.at the turning point, how far is the second student from the destination?

A1.5m wire carries a 2 a current when a potential difference of 52 v is applied. what is the resistance of the wire?