ढोल की पोले Dhol ki Pol एक बार एक जंगल के निकटदो राजाओं के बीच घोर युद्ध हुआ। एक जीता दूसरा हारा। सेनाएं अपने नगरों को लौट गई। बस, सेना का एक ढोल पीछे रह गया। उस ढोल को बजा-बजाकर सेना के साथ गए...
How An Automobile Runs With Gasoline? In present day the cars are built so efficiently that we can drive all their life without really knowing what makes them run. We reach for a gasoline station, fill up the tank, and move away. If something goes...
What Do You Know About Gasoline? Gasoline is considered a perfect fuel. It is a liquid. It is light. It changes easily into vapour. It is easily ignited. Gasoline is a mixture of hydrocarbons, which means it is a compound make up of carbon and...
How The Fluorescent I Lights Work? Things glow when they are hot. His true in a majority of the cases. In bulbs, there is a filament that must be heated to high temperature such that it gives off light. There are materials which can glow...
How An Electric Bulb Is Illuminated? An Englishman Humphry Davy in the year 1800, was conducting certain experiments with electricity. He had electric battery which was quite weak. He connected the two wires to the ends of battery and attached a piece of carbon to...
How Electricity Is Produced By A Battery? Electric current for power can be produced in two ways. It can be produced by machines called “dynamos”, or “generators” and by battery cells. A battery cell produces electricity by changing chemical energy into electrical energy. Part of...
What Do You Know About Penicillin? Penicillin created much excitement and became known very quickly. Hardly any weapon against disease made such an impact. It was as if suddenly the world became aware of a “miracle”, happening before its eyes. Penicillin is not one of...
How The Earthquakes Are Recorded On A Seismograph? Sometimes there is big news hitting the headlines of national dailies about an earthquake that happened is some part of the world, possibly in South America or Japan. The news is about cities being destroyed, hundreds of...
What Do You Know About Magnet? There is an old legend, that a shepherd by name Magnes, tending his flocks along the slopes of Mount Ida, discovered that his iron Crook and the iron nails of his sandals were clinging to a dark black stone....
Why The Bite of a Mosquito Itches? We have heard the expression “The female of the species is deadlier than the male”. It actually applies to the mosquitoes. It is the female mosquito that only sucks blood. The bill of the female has some sharp...
