Sci-Talks

In a hot summer day we use lot of the cooling devices such as the electric fan, cooler, air conditioner (AC). all are consuming a large amount of electric energy and are become reason for increasing the electricity bills.these devices provide the instant cooling. but what happen if i says that we use such system that provide cooling for a long period of time at free of cost after its installation, you will says this is impossible  according to basic principle of thermodynamics the work done take place in removing heat from the body and this work done by the external electrical source by mean of the cooling devices.  so we need energy for cooling. but this is possible to remove heating from a body without doing some extra work on it by the virtue of the property that the heat energy is transferred from hotter body to colder body. removal of heat from atmosphere by this method called the passive radiative cooling.   before understing the radiative cooling process let u...

Glycerine is a common ingredient in most of body lotions, Gels, cream and cosmetics. It is a colourless, odourless, viscous and non toxic liquid which have sweet in taste. Chemical formation of glycerine Chemically glycerine is a tri-hydric alcohol. It consists 3 -OH group. It's chemical name is 'Propane-1,2,3-triol'. Chemical formula is  C 3 H 8 O 3 . glycerine Manufacturing of glycrine Glycerine produced from animal and plant sources. it is the side product in the most of reaction like saponification hydrolysis etc.    The crude glycerol produced from hydrolysis of triglyceride. Which can be purified by activated carbon from the organic impurities. All animals and plants are good source of  triglyceride. Uses of glycerine Glycerine is most useful chemical which use various chemical industries and also in daily life. Most of common use of glycerine are Use in food industry    Glycerine is treated as humectants, solve...

Hey friends,     Today we learn about an other interesting topic, is about 'Glass'. We can see the many things around of us that made from glass like window, bulbs, TV screen etc. Did you ever think about it how to form glass or why the glass is transparent.    In this topic we understand facts about the glass and finding the answer of following questions :- * What is Glass ? * How to form Glass ? * Why Glass is transparent ? and * Is Glass solid or liquid ? What is Glass ? :-    Generally glass is a rigid transparent material that often use widespread practical, technological, and decoration. water glass credits : pixel How to form Glass ?    Formation of glass is an interesting phenomena. Glass can formed by melting of ' Sand ' with ' Soda ash ' (Sodium Carbonate) and ' Limestone ' (Calcium Carbonate) at extremely high temperature approx 1700°C . Glass can be obtains by only heating the sand at high temperature more then ...

Hey guys,     Today we have learned about an interesting topic is 'Clouds'.     When we talk about clouds a we can imagine the rainy season, rainbows etc. in our mind. But did you know about the clouds like what is the components that form the clouds and how occurring this. So lets start searching and find answer.     What is clouds?   Clouds are the saturated mixture of tinny water droplets and other dust particle of the atmosphere. In other words clouds are an aerosol of smallest liquid droplets, frozen crystals (Ice crystals) and other gases that suspended in our atmosphere ( like:- sulphuric acid, nitrogen oxides etc.). These water droplets are so small even then you can't see them, its diameter is about the 1000th of a centimeter and its highly dens in the atmosphere about one cubic meter of air contains 100 millions droplets. 'Nephology' is the science of the clouds. Clouds in apola credits : shivam dhyani How to form the ...