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Poisonous and Infectious Substances : These are the substances liable to cause death or serious injuries to health, if swallowed or inhaled or allowed to come in contact with skin. Infectious substances are those contaminated with disease inducing micro-organisms. The examples of poisonous substances are, pesticides, tetraethyllead and many drugs etc. The contaminated hospital wastes, strains of pathogens etc. Are considered infectious substances.
Define White Blood Corpuscles as Internal Defence Mechanism The white blood cells are probably the most important part of our immune system. You may recall reading about the wh
A nearly horizontal,12 ft wide rectangular channel carries 60cfs at a depth of 3.0ft.The width of the channel is smoothly contracted to 6 ft at the downstream section. (a) Deter
How are electrons arranged around the nucleus? Electrons are arranged into very specific rings known as orbitals. Electron orbitals, sometimes referred to as electron shells, c
What are the functions of insulin? 1. Promotes glucose transport into all cells of the body except brain. Rapid transport of glucose into the cells decreases the blood glucose
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Precautions : The following must always be observed while dealing with lasers. 1) Never look along a laser beam or expose any part of your skin to it. Beware of reflected laser
Definition of a rock and the difference between a rock and a mineral ? A rock is a mixture of one or more minerals. There are many kinds of rocks, and we will learn about them
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Softening hard water by boiling Temporary hardness can be removed from water by boiling. Shake a little temporary hard water with a few drops of soap solution and see if you c
Describe Common elements that make up the minerals of the Earth's crust? The Earth's crust, which is the layer of the Earth we are on now, is made of numerous minerals and rock
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