Term
| What is 212 degrees Fahrenheit equal to in Celsius? |
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Definition
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Term
| What is 0 degrees Celsius equal to in Fahrenheit? |
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Definition
| It is equal to 32 degrees Fahrenheit. |
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Term
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Definition
| The measure of kinetic energy of an object. |
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Term
| How does a thermometer work? |
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Definition
| As the alchohol in the thermometer's kinetic energy increases (tempature increases), it expands, moving upward. |
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Term
| How does a thermostat depend on two different metals? How does this work? |
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Definition
| As the tempature rises it causes one of the metals to expand faster than the other causing the coil to turn one way or the other. |
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Term
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Definition
When an object has a kinetic energy of 0.
-273 degrees celsius is absolute 0 of Kelvins. |
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Term
| Describe the relationship between temperature and energy. |
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Definition
| The higher the temperature the more energy an object has. |
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Term
| With heat, in what direction does energy get transferred? |
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Definition
| If goes from the hotter object to the cooler object. (tryin to reach an equilibrium) |
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Term
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Definition
| When energy is transferred through direct touch. |
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Term
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Definition
| Convection is the transfer of energy through the air. |
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Term
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Definition
| The transfer of energy through electromagnetic rays. |
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Term
| What properties make something a good conducter or a insulater? |
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Definition
A good conducter: Dense
A good insulater: Lots of space between it's particles (not dense) |
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Term
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Definition
| Specific heat is the amount of energy it takes ot heat a kg of a substance one degree. |
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Term
| What is the specific heat of water? |
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Definition
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Term
| As energy is added to water, what is happening during the times that tempature doesn't change? |
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Definition
| Either it raises it's tempature or changes it's state; but not both at the same time. If the tempature isn't going up, it's changing state. |
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Term
| What is the first law of thermodynamics? |
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Definition
| The total energy in any process is conserved; whether that energy is transferred as a result of work, heat or both. |
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Term
| Describe the concept of entropy. |
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Definition
| The measure of disorder in any system. The concept is that ll energy spreads out, even though it still exists, you can never get it back as usable energy. |
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Term
| Why does usable energy decrease in all energy transfers? |
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Definition
| Because during the process of transferring energy, som of it is lost to entropy. |
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Term
| Describe each "stroke" of a four stroke engine. |
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Definition
1. Intake
Suck in air and fuel
2. Compression
Compress the air and fuel
3. Power
Air and gas is ignited and pushed the piston downward
4. Exhaust
Piston moves up again and pushes waste gases up and out. |
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Term
| His is an internal combustion engine a contributer to entropy? |
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Definition
| When the engine pistons push upward and release the air in the exhaust stroke, it is released to entropy. Most of the energy is lost as heat. |
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