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Galvanization (or galvanizing as it is most commonly called in that industry) is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which parts are submerged in a bath of molten zinc.

The colors in the rainbow are: Red Orange Yellow Green Blue Indigo Violet. Violet at one end and red on the other.

White blood cell, also called leukocyte or white corpuscle,are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders. All white blood cells are produced and derived from multipotent cells in the bone marrow known as hematopoietic stem cells.

A supersonic aircraft is an aircraft able to fly faster than the speed of sound. Fighter jets are the most common example of supersonic aircraft.

The aerodynamics of supersonic flight is called compressible flow because of the compression (physics) associated with the shock waves or “sonic boom” created by any object travelling faster than sound.

Penicillin antibiotics were among the first medications to be effective against many bacterial infections. Penicillin was discovered in 1928 by Scottish scientist Alexander Fleming for which he shared the Nobel Prize in Physiology or Medicine in 1945.

A hedgehog is any of the spiny mammals of the subfamily Erinaceinae, in the eulipotyphlan family Erinaceidae. There are seventeen species of hedgehog in five genera, found through parts of Europe, Asia, and Africa, and in New Zealand by the introduction.

A sphygmomanometer, also known as a blood pressure meter, blood pressure monitor, or blood pressure gauge, is a device used to measure blood pressure .
A Manometer is a device to measure pressures.
Cardiograph is an application which measures your heart rate.
A barometer is a scientific instrument that is used to measure air pressure in a certain environment.

Hormones are chemical messengers in the body that travel in the blood to organs and tissues signalling them to do the work they were designed to do. They can affect many different processes in the body, including reproduction, sexual function, metabolism, growth and development, and even mood.

At any given time in a healthy hive, there is 1 queen bee, up to 40,000 or so female worker bees, and a few hundred male drones.The queen’s only job is to lay eggs and a drone’s job is to mate with the queen. This queen will stay with the colony for at least a year until a large enough swarm is available to go start a new colony somewhere else.

A black-and-white TV has a single electron gun, while a color TV needs three guns because each pixel on the screen is made of a red, a green and a blue dot.

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