A rigid bar used to lift a stone is 100cm long. The pivot is 80cm from the effort. What type of lever is used in lifting the stone. Calculate the load distance. Calculate the mechanical advantage of using this rigid bar.

Amanometer is used to measure the air pressure in a tank. the fluid used has a specific gravity of 1.25, and the differential height between the two arms of the manometer is 34 in. if the local atmospheric pressure is 12.7 psia, determine the absolute pressure in the tank for the cases of the

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

If element x has 99 protons how many electrons does it have