5. The temperature of liquid air is -180°C. What is it on the Fahrenheit scale?
6. Mercury is a solid at -40°F. What is this on the centigrade scale?
7. How much heat will be required to raise the temperature of 8 lbs. of water 32°F.; 5 lbs. 10°F.?
Fig. 125.—A clinical thermometer used to take the temperature of the body.
8. How much heat will be required to raise the temperature of 30 g. of water 43°C.; 20 g., 50°C.?
9. Compute the temperature of absolute zero on the Fahrenheit scale.
10. Take three basins of water, one hot, one cold, and one lukewarm. If one hand be placed in the hot water while the other is placed in the cold and after a few minutes both are placed in the lukewarm water, this water will feel cool to one hand and warm to the other. Explain.
11. If 200 ccm. of air at 200° absolute is heated to 300°A. under constant pressure, what volume will the air occupy at the latter temperature?
12. How does one change a reading on the centigrade scale to a corresponding reading on the absolute scale?