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.
If electricity costs $0.11 per kWh and the vehicle consumes 34 kWh to travel 100 miles, the cost per mile is about $0.04. If electricity costs $0.11 per kilowatt-hour, charging an all-electric vehicle with a 70-mile range (assuming a fully depleted 24 kWh battery) will cost about $2.64 to reach a full charge.This cost is about the same as operating an average central air conditioner for about 6 hours.eneral Motors estimates the annual energy use of the Chevy Volt will be 2,520 kilowatt-hours, which is less than that required for a typical water heater or central air conditioning. To compare the fueling costs of individual models of conventional and plug-in vehicles, see the Vehicle Cost Calculator.