In brief, ârhetoricâ is any communication used to modify the perspectives of others. But this is a very broad definition that calls for more explanation. The OWLâs â Introduction to Rhetoric â vidcast explains more what rhetoric is and how rhetoric relates to writing. This vidcast defines rhetoric as âprimarily an awareness of the language choices we make.â It gives a brief history of the origins of rhetoric in ancient Greece.
The lawof conservation of energy says that energy is neithercreated nor destroyed. When we use energy, itdoesnât disappear. We change it from one form ofenergy into another.A car engine burns gasoline, converting the chemicalenergy in gasoline into mechanical energy. Solar cellschange radiant energy into electrical energy. Energychanges form, but the total amount of energy in theuniverse stays the same.
A litre of gasoline contains roughly 8.9 kilowatt-hours of energy, so you could say that each kWh of gasoline energy cost me roughly 10.5 cents. Six months ago, I was paying $1.30 per litreâ14.6 cents. (To determine the cost of a kWh of gasoline energy, divide the per-litre price by 8.9 kWh.).Natural gas (a.k.a methane) . In Canada, natural gas is sold at the retail level by the cubic meter. A cubic meter of natural gas contains roughly 10 kWh of energy.ix months ago, I was paying $1.30 per litreâ14.6 cents. (To determine the cost of a kWh of gasoline energy, divide the per-litre price by 8.9 kWh.). Natural gas (a.k.a methane) . In Canada, natural gas is sold at the retail level by the cubic meter. A cubic meter of natural gas contains roughly 10 kWh of energy.