Question | Answer |
What are the 6 forms of energy? | machanical, thermal, ,nuclear, electrical,
chemical, and Radient |
What is an example of machanical energy? | A hammer moving towards a nail. |
What is an example of thermal energy? | the heat feeling when you rub your hands together. |
What is an example of nuclear energy? | nuclear power plants |
What is an example of electrical energy? | energy of electric charges |
What is an example of chemical energy? | when you burn coal |
What is an example of radient energy? | radio waves |
What is the first form of the 2nd law of Thermodynamics? | In any transformation of energy there is always a decrease in the usable energy. |
What is the 2nd form of the 2nd law of Thermodynamics? | Heat can only move from hot to cold. |
What is the 3rd form of the 2nd law of thermodynamics? | In a closed system disorder increases. |
What is the most plentiful non-renewable resource? | coal |
What is one non-renewable rsource? | Coal, uranium, natural gas, oil shade |
What is an example of efficency? | devices that are used for lighting |
What is heat engine? | Any device that converts heat energy into michanical energy. |
Is heat engine efficient? | no |
When energy gets lost what is it lost as? | heat |
What is system efficency? | energy that orginally comes from coal |
After going through the power plant how much energy is used as heat? | 2/3 of it |
What is an example of system efficiency? | a incondesent light bulb. |
What is an example of energy conversion? | When you mine, crush, and transport coal. |
What is "lost" heat? | When some energy is "lost" as heat? |
Where do we get most of our energy from? | coal |
what do people have to pay since some energy gets "lost"? | a heat tax |
What are resources? | Amounts of material that are known or unknown. |
What are reserves? | known amounts of material that can be extracted with technology under present economic conditions. |
Are resources larger or smaller than reserves? | larger |
What is an example of high energy quality? | sugar |
What 2 energy's are high in quality? | machanical and electrical. |
What has the lowest energy quality? | ambiant temperture |
What is an example of low energy quality? | sunlight |
Where would you find a fire ball of coal? | inside a furnace |
Where is coal located? | Inside the earth's crust under tons of rock. |
Why is coal pulverized? | so that the coal can burn easier and hotter with less waste. |
Why is water pressurized? | It turns to steam faster and more efficently. |
Why is ash mixed with concrete? | It makes the concrete stronger. |
How is steam recycled? | It is converted back to water. |
What is a recieving station? | A place where electricity goes and reduces voltage and then is sent to a substation. |
What is net energy? | the total energy that is used over a lifetime of the system. |
What is net energy useful for? | analysis |
What is an example of an analysis? | Can't use a ratio close or less than one. |