48. Low Temperatures

48. Low Temperatures - its heat energy to something else....

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THE MECHANICAL UNIVERSE Name: Mai Nguyen Video 48. Low Temperatures Class: PHYS 2425 1. Is it more difficult to heat things up or make them cold? Make them cold 2. What are the two main elements that make up air? Nitrogen and Oxygen 3. What two variables determine the states of matter? Pressure and Temperature 4. In which state do molecules not adhere to each other? Gas 5. The use of what common gas led to a cooling breakthrough in the 19 th century? Carbon Dioxide 6. What principle lies at the heart of the liquification process? The exchange of heat. In order for something to get cooler, it must pass along
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Unformatted text preview: its heat energy to something else. This would allow it to cool down and will cause the other object to warm up. 7. Who discovered the Law of Conservation of Energy? James Prescott Joule 8. What material did Lindys cooling system utilize? He only used air 9. Which gas is the most difficult to liquefy? Hydrogen 10. Who was the first person to liquefy hydrogen? James Dewar 11. What gas has the lowest liquification temperature of all? Helium gas 12. At what temperature does helium liquefy? 4K...
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This note was uploaded on 02/23/2012 for the course PHYS 2425 taught by Professor Sherman during the Summer '08 term at Collin College.

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48. Low Temperatures - its heat energy to something else....

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