Learning about the body language is a skill. If we can interpret the body language of others then we can better understand what he feels and thinks, whether his words are matching with his words or not. To interpret body language you have to observe […]
Why did the U.S enter the Vietnam War?
After the Second World War many countries of Eastern Europe had come under the communist rule like china, Russia etc. America, Africa and Asia were also coming under the influence of communist rule. U.S felt that if the same situation continues then they would lose […]
How hair coloring works?
Prominent ways of hair coloring: 1) Temporary hair coloring: In temporary hair coloring pigment molecules are large in size and do not enter in the cuticle of hair. They only coat the hair which can be removed by shampooing. Products like shampoo, gels sprays etc […]
Who invented the Fax Machine?
The term fax machine is the short form for facsimile machine. This device can send copies of documents over a telephone line. The first facsimile machine was invented by Alexander Bain, a Scottish inventor in 1846. He was born in Watten in Scotland and has […]
Who invented frozen food?
The method of freezing food was first invented in 1929 by Clarence Birdseye a popular American inventor in order to preserve the food from decomposing. He developed and commercialized a method which quick-freezes food products into convenient packs by converting water into ice. This freezing […]
Why does water ripple?
When a stone is thrown in the water say pond, tank etc. you have noticed that many small waves of water are formed which moves away from the point where stone hits the water. These are known as ripples. Water in liquid state is not […]
How do batteries work?
Batteries are modified form of electrochemical cells, which are capable of generating electricity due to continuous chemical reactions within them. The working principle of batteries is related to chemistry. This is better explained in terms of “Redox” reactions. The “Redox” reactions are a combination of […]
Who invented the dustpan?
The first dustpan was invented by T.E. McNeill an American inventor in 1858 for which he was granted a United States patent. Lloyd P. Ray, an African American made improvements to the dustpan by the addition of a short wooden handle and a collection plate […]
Why does salt melt ice?
Water freezes and melts at zero degree. Unless the conditions are changed water does not freeze or melt, and a balance is maintained. Now if the temperature is lowered ice/water mixture will start forming ice and if temperature is increased ice/water mixture starts melting. If […]
What are shooting stars?
Millions of small rock clumps are present in the space which can vary in size. It can have the size of a grain or the size of a golf ball and is made up of dust. During the earth’s revolution around the sun these small […]