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Grades 11 and 12 - Physics - Senior High School - Rate of Heat Transfer
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Grades 11 and 12 - Physics - Senior High School - Rate of Heat Transfer
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10 Questions

1. Which of the following would be the worst conductor of heat?
2. 18,000 J of energy was transferred from an electric heater to a 2kg block of steel. The temperature increased by 18oC. Based on these figures, what is the specific heat capacity of the steel?
3. Which way does thermal energy travel?
4. LEDs are low energy alternatives to conventional light bulbs but they still generate a lot of heat when they are switched on. They need to be attached to a heat sink to keep them cool. Which of the following would make a good heat sink for an LED?
5. A group of students carried out an investigation into the rate at which different foods cool down. They measured the temperature of each food at 30 second intervals until the food had cooled from 80oC to room temperature. They then drew graphs of the results. In each case, the graph was the same shape. Which of the following describes the shape of their graphs?
6. 18,000 J of energy was transferred from an electric heater to a 2kg block of steel. The temperature increased by 18oC. Based on these figures, what is the specific heat capacity of the steel?
7. If 18,000 J of energy was transferred from an electric heater over the course of 2 minutes, what is the rate that heat was transferred?
8. A cool box is used to keep food cooler than the surroundings. They are often used to carry chilled or frozen food home from a supermarket or to keep food fresh at a picnic. Which of the following materials would be suitable to make the walls of a cool box?
9. A group of students carried out an investigation into the rate at which different foods cool down. They measured the temperature of each food at 30 second intervals until the food had cooled from 80oC to room temperature. They then drew graphs of the results. In each case, the graph was the same shape. Which of the following describes the shape of their graphs?
10. A cool box is used to keep food cooler than the surroundings. They are often used to carry chilled or frozen food home from a supermarket or to keep food fresh at a picnic. Which of the following materials would be suitable to make the walls of a cool box?

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