Suction cups work by having less air pressure on one side than the other, thus forcing them against the surface they stick to. So, despite the fact that it seems like the suction cup is pulling on a surface, it is actual... More »

Filtration is a method of separating solid impurities from liquid by allowing the liquid to pass through a filter, which usually consists in a porous material such as cotton wool, cloth, paper, glass wool or asbestos. Th... More »

A car jack uses hydraulic or mechanical force to lift vehicles. Jacks using hydraulic force depend on pressure. A pump plunger takes oil through two cylinders. When pushed back, the plunger opens the suction valve and fo... More »

Suction cups stick better when the surface to which they are stuck and the suction cups themselves are clean and free from dirt. If necessary, wash the suction cups with warm, soapy water and pat them dry. Then, clean th... More »

A rotary vane vacuum pump works by using centrifugal force to turn blades against the circular surface of a cylinder whereby pockets of air are pushed from an inlet port to an outlet port as air pressure increases. Air p... More »

Some ideas for an egg drop experiment include packing the egg in cereal, suspending the egg over a box with panty hose and placing the egg within a stack of Styrofoam cups. All of these constructions allow the egg to fal... More »

A piston is a cylindrical plunger that moves within a metal cylinder through the four strokes of the engine cycle: intake, compression, power and exhaust. While their motion is predicated on other engine parts and the mi... More »