* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Reading 21: Temperature, heat and expansion (pp 306-324)
Survey
Document related concepts
Water heating wikipedia , lookup
Dynamic insulation wikipedia , lookup
Heat exchanger wikipedia , lookup
Hypothermia wikipedia , lookup
Radiator (engine cooling) wikipedia , lookup
Underfloor heating wikipedia , lookup
Copper in heat exchangers wikipedia , lookup
Heat equation wikipedia , lookup
R-value (insulation) wikipedia , lookup
Cogeneration wikipedia , lookup
Intercooler wikipedia , lookup
Solar water heating wikipedia , lookup
Solar air conditioning wikipedia , lookup
Thermal conduction wikipedia , lookup
Transcript
Name___________________________ Period____ Date__________________ Reading 21: Temperature, heat and expansion (pp 306-324) physics 1. Explain how the Celsius temperature scale is organized. 2. Explain how the Fahrenheit temperature scale is organized. 3. What is meant by the phrase “absolute zero”? 4. Temperature is related to kinetic energy. Explain the surprising caption of figure 21.2. 5. What is heat? 6. Heat flow is always in what direction? 7. If a thermometer “shows only its own temperature”, how can it be useful? 8. What’s the difference between heat and internal energy? 9. What’s the difference between a calorie and a Calorie? 10. Food labels often show the energy value in Calories. How is this number determined? 11. In the Tour de France, a professional bicyclist may produce energy output of 400 watts (or 400 Joules per second). If he sustained this output for a 10 hour ride, how many Calories would he need to eat? Show your work, using the factor label, similar to the example on p. 312. 12. When you add heat to something, only some of the energy causes a temperature increase. Name three other ways the added head can affect it. 13. How much heat is produced by a burning Cooler Ranch Dorito chip, if it warms 150 g of water by 30oC? Show your work. G= U= F= S= 14. At the beach in August, the sun shines equally on sand and surf, and the sand is hot but the water is not. Explain how this happens, using the concept of specific heat capacity. 15. The Gulf Stream warms northern Europe, because the water had previously warmed up in what location? 16. Of the three phases of matter, which one tends to expand the most when heated? Which expands the least? 17. Study figure 21.9. Why do bridges need expansion joints, while regular roads don’t? 18. In the winter, your house cools down. How does the thermostat sense the lower temperature, so it can start the heating system? 19. If a 50 cm long brass rod becomes 51 cm when heated by 20oC, what is its ratio of expansion for 1oC? 20. At what temperature is water’s density the highest? Why does water expand when cooled below this? 21. Explain why ice floats.