Abicyclist in the tour de france crests a mountain pass as he moves at 15 km/h. at the bottom, 4.2 km farther, his speed is 65 km/h. estimate his average acceleration while riding down the mountain.

An observer that stands still as the electron moves by him, will observe

Asher cycles 12 miles in 16 hours. what is his speed?

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.