3. An iron railroad rail is 700 ft long when the temperature is 30C. What is its length when the temperature is -10C?

5. A machinist wishes to insert a steel rod with a diameter of 5 mm into a hole with a diameter of 4.997 mm. By how much would the machinist have to lower the temperature of the rod to make it fit the hole?

7. A fixed amount of a particular ideal gas at 16C and a pressure of 1.75 x 105 Pa occupies a volume of 2.75 m3. If the volume is increased to 4.20 m3 and the temperature is raised to 26.4C, what will be the new pressure of the gas?

11. How much heat is needed to raise the temperature of 5 kg of silver from 20C to 960C?

13. (a) Compute the amount of heat needed to raise the temperature of 1 kg of water from its freezing point to its normal boiling point. (b) How does your answer to (a) compare to the amount of heat needed to convert 1 kg of water at 100C to steam at 100C?

15. A 1,200-kg car going 25 m/s is brought to a stop using its brakes. Let's assume that a total of approximately 20 kg of iron in the brakes and wheels absorbs the heat produced by the friction.

(a) What was the car's original kinetic energy?

(b) After the car has stopped, what is the change in temperature of the brakes and wheels?

17. A 10-kg lead brick is dropped from the top of a 629-m-tall television transmitting tower in North Dakota and falls to the ground. Assuming all of its energy goes to heat it, what is its temperature increase?