powers

Advantages - The demand for electricity varies at different times of a year. One big disadvantage is that the wind, waves and tides do not occur at all time and hence cannot guarantee steady production of electricity. Hydroelectric power stations can solve this problem. When the demand is..

Magnifying power of an astronomical telescope may be defined as the ratio of the angle subtended at the eye by the image to the angle subtended at the eye by the objec..

Hydroelectric Power Plants - The electricity produced from flowing water is called Hydroelectric power. The world's first hydroelectric power plant was set up in 1882 in Wisconsin USA. It had a very small output, supplying power only for about 250 light bulbs..

Oxidising Power of Halogens - Halogens have high electron affinity values and therefore they have strong tendency to take up the electro..

Chemical energy stored in the coal is used to heat water producing steam which turns turbines rotating electromagnets, which in turn generates electricity. The majority of power stations in Britain use coal as their energy source. It is wrong to suppose that the coal industry is declining..

Potential energy is the energy possessed by an object by virtue of its position or condition. Kinetic energy = 1/2 mv 2 Potential energy = mgh Law of conservation of energy states that energy can neither be created nor destroyed but can be transformed from one form to another. Power is th..

The magnifying power or angular magnification of a microscope may be defined as the ratio of the angle subtended at the eye by the image formed at the distance of the distinct vision to the angle subtended by the object when placed at the distance of the distinct vision. The ray diagram s..

Halogens have high electron affinity values and therefore they have strong tendency to take up the electron: ..

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