1. Convert the Following Temperatures from Celsius to Kelvin

1. Convert the following temperatures from Celsius to Kelvin. a. 50o C b. 150o C c. 600o C 2. Covert the following temperatures from Kelvin to Celsius. a. 50 K b. 150 K c. 273 K 3. The official record for the lowest temperature ever recorded on Earth was set at Vostok, Antarctica, on July 21, 1983. The recorded temperature that day was -89.2o C. What is this temperature in degrees Fahrenheit? 4. The world’s longest suspension bridge is the Akashi Kaikyo Bridge in Japan. The bridge is 3910 m long and constructed of steel. How much longer is the bridge on a warm sunny day (30o C) than on a cold day (-5o C)? 5. A steel girder is 200 m long at 20o C. If the extreme temperatures the girder might be exposed to is -30o C to +40o C, How much will the girder expand and contract? 6. A concrete highway is built of slabs 12 m long. How wide should the expansion joints be (@ 15o C) to prevent buckling if the design temperature range is -30o C to +50o C? 7. It is desired to slip an aluminum ring over a steel rod. At 10o C the inside diameter of the ring is 4.000 cm and the diameter of the rod is 4.040 cm. a. In order for the ring to just slip over the rod, should it be heated or cooled? b. Find the temperature of the ring when it will barely slip on the rod? 8. Early in the morning when the temperature is 5.0o C, gasoline is pumped into a car’s 51 L steel gas tank until it is filled to the top. Later in the day the temperature rises to 25o C. a. Will gasoline spill out of the tank? b. If yes, how much will spill. If no, what extra volume will the tank contain (i.e. How much gasoline could be added to the tank? 9. A glass window 0.50 cm thick measures 85 cm by 38 cm. How much heat flows through the window per minute if the inside and outside temperature differs by 18 Co? 10. Find the heat that flows through a lead brick each second if the lead brick is 15 cm long, has a cross sectional area of12 cm2, and has a temperature difference of 8.5 Co between the ends of the brick.

1. a) 323 K 2. a) -223o C 3. -128.6o F 4. 1.6 m 5. expand 4.8cm b) 423 K b) -123o C contract 12 cm c) 873 K c) 0o C 6. 1.01 cm 7. a) heated 8. a) yes 9. 10. 2.3 J b) 430o C b) 0.93 L