A 70kg person with very little hair is riding a go kart, 90kg, at K1 at 11 m/s and drives directly into a rail. How far will the bumper spring compress under the collision as everything comes to a stop? The spring bumper has a spring coefficient of 500,000N/m.

In an experiment, how can i change human errors? be specific.

Avertical clean glass piezometer tube has an inside diameter of d = 1 mm and is used to measure pressure in a horizontal pipe carrying water as shown. due to pressure in the pipe, the water at 20c rises into the tube to a height h. if the water pressure in the pipe is p = 500 pa gauge, estimate the height h: (a) without considering surface tension (b) with surface tension (capillary) effects. the contact angle  can be assumed at 30 deg

What is an electric motor? explain its operation. 2-3 sentence