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.
We burn fuels such as coal to produce energy. We burn fuels to produce energy. When these fuels burn, the atoms [atoms: An atom is the smallest part of an element that still has the properties of that element, comprising electrons surrounding a nucleus of protons and neutrons.oal is made mainly of carbon. This burns to produce carbon dioxide. Petrol, diesel fuel and fuel oil are hydrocarbons. Their molecules are made of carbon and hydrogen atoms. When these fuels burn, the carbon and hydrogen atoms combine with oxygen atoms to produce carbon dioxide and water vapour. Page: 1  1. 2  2. 3  3.