two or more simple machines

Simple Machines - In all the above examples, a machine either multiplies or reduces the effect of the force that is applied. A bicycle is a machine which is used to gain speed. We gain speed by exerting additional force. When we try to ride a bicycle up a ste..

A bicycle is a machine which is used to gain speed. We gain speed by exerting additional force. When we try to ride a bicycle up a steep hill, we soon realize that we gain speed by applying greater force. It is impossible to multiply both the force and gain the speed at the same tim..

These lipids are the esters of fatty acids with alcohols. They are of two types. Triglycerols and waxe..

fig. 13.10 - Common Fatty Acids A fatty acid is described as unsaturated if one (mono) or more (poly) double bonds occur between the carbon atoms of the chain. The 18 carbon unsaturated fatty acids are oleic acid, linoleic acid and linolenic acid with one, two and three double bond respec..

A simple microscope is nothing but a single biconvex lens. It is referred to as magnifying glass. Magnifying Glass Usually the focal length of the convex lens is around 2.5 cm. The object to be viewed through a simple microscope is placed between the optic center and t..

Before surgeons can perform open-heart surgery or heart transplants or even to correct a simple heart defect, they have to be able to open up the heart and expose the chambers. To enable this, circulation and respiration are maintained by the heart - lung machine. The func..

Before surgeons can perform open-heart surgery or heart transplants or even to correct a simple heart defect, they have to be able to open up the heart and expose the chambers. To enable this, circulation and respiration are maintained by the heart - lung machine. The function o..

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Compounds formed by the combination of two different elements are called binary compounds. Example: CO, CCl 4 , H 2 S, NaCl, NH 3 , HBr. Binary compounds may be ionic or molecul..