Problem and Solution Temperature and Heat [ Edition I ]

1. What is the temperature in Kelvin scale following (a) 86 ⁰ C, (b) 78 ⁰ F, (c) -100 ⁰ C, (d) 5500 ⁰ C?

2. What price fahreinheit scale absolute zero?

3. The temperature inside the earth and the sun is about 4000 ⁰ C and 15 x 10 ⁶ C. (A) what is the temperature in Kelvin? (B) What percent mistake done in order to each jka case someone forgets to change ^c C to Kelvin?

4. How much heat (joules) required to raise the temperature of 20 kg of water from 15 ⁰ C to 95 ⁰ C?

5. How much work must be done to offset eating piece of cake 750 calories?

6. What temperature to 7700 J of work raise 3 kg of water that was originally 10 ⁰ C?

7. An average active eating 2500 cal a day. (A) How much is this in joules? (B) What is the kilowatt-hour? (C) power company to charge ten cents per kilo-watt hour. How much your energy costs per day if you buy from the company? Can you feed yourself with the money worth it for one day?

8. A water heater that is inserted into the absorbing power of 350 W. Estimate the time it takes to heat a bowl of soup (assume a 250 ml of water) from 20 ⁰ C to 50 ⁰ C.

9. A water heater can produce 7200 kcal / hour. How much water can heat from 15 ⁰ C to 50 ⁰ C per hour?

10. How many kilocalories of heat generated when the brakes are used to stop the car 1000 kg of speed 100 km / h?

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