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A life buoy, is a life saving buoy designed to be thrown to a person in the water, to provide buoyancy, to prevent drowning.

Life Buoy

A life buoy, is a life saving buoy designed to be thrown to a person in the water, to provide buoyancy,…

A Cartesian diver or Cartesian devil is a classic science experiment, named for René Descartes, which demonstrates the principle of buoyancy and the ideal gas law.

Cartesian Diver

A Cartesian diver or Cartesian devil is a classic science experiment, named for René Descartes,…

A Junk is a native Chinese vessel. It is a clumsy craft, with very high forecastle and poop, and pole masts carrying square sails of matting, and is slow and awkward to handle. Junks are often of large size, their tonnage sometimes reaching 1,000 tons.

Chinese Junk

A Junk is a native Chinese vessel. It is a clumsy craft, with very high forecastle and poop, and pole…

An egg dropped in fresh and salt water to show the properties of density.

Egg Plunged in Fresh and Salt Water

An egg dropped in fresh and salt water to show the properties of density.

A pump is a device used to move fluids, such as liquids or slurries, or gases. A pump displaces a volume by physical or mechanical action. One common misconception about pumps is the thought that they create pressure. Pumps alone do not create pressure; they only displace fluid, causing a flow.

Vent Controlling Mechanism for Pumps

A pump is a device used to move fluids, such as liquids or slurries, or gases. A pump displaces a volume…