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.
Installing solar panels on one home costs about $20,000 to$50,000. Many states now offer discounts to families who want to install solar panels, so the actual cost is not that high. The average cost of electricity from coal-burning power plants is around 10 cents per kilowatt hour. A kilowatt hour is the amount of energy used if you leave a 100 watt light bulb turned on for 10 hours. The cost of electricity from a solar power plant is about 30 cents per kilowatt hour.