Clues are found etched in to record America’s creation.

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.