A person who studies the origin of the words and its meaning is called an etymologist. Etymology is a branch of linguistics. I think all these are terms are named in English language, in every developed language there is a different term for each studies.
The wisdom of using an electric heater depends on the per kilowatt cost in your region. 1  If your heater has a 1000 watt rating and your cost of electricity is $0.15/Kwh your cost to operate for one hour would be $0.15. 2  If the element is activated 10 hours out of every 24 hours your cost per day would be $1.50.
at $ 45000 a solar energy system equates to $ 9000 a kilowatt the $ 9000 per kw for solar is not very helpful in comparing electric generation costs to other fuels like coal or gas since coal oil and gas can be measured on a cost per kwh we should measure solar costs on a kwh basishe $ 9000 per kw for solar is not very helpful in comparing electric generation costs to other fuels like coal or gas since coal oil and gas can be measured on a cost per kwh we should measure solar costs on a kwh basis