LABORATORY MANUAL 19 



RESULTS 



1. Did the greater change in temperature take place when 

 the large or small mass was used? 



2. Which gave the greater quantity of heat when placed 

 in water, the small or the large mass? 



3. If the tumbler contained 400 g. of water in Case 2, how 

 many calories did the water absorb from the heated metal, 

 as shown by your observation? 



4. A man wishes to heat his house with steam at 212 F., 

 and can get two sizes of radiators. If he wishes to keep the 

 house as warm as possible, should he buy the large or the 

 small radiators? Why? 



5. Why are hot-water radiators necessarily larger than 

 steam radiators? 



EXERCISE XII (Textbook 115) 

 WEATHER OBSERVATIONS 



APPARATUS: A thermometer; ruler. 



CONDITIONS NECESSARY: A thermometer placed out of 

 doors where the sun does not shine upon it at any time, 

 and not in contact with the wall of the house. 



DIRECTIONS FOR WORK : Prepare a page of your notebook 

 in six vertical columns, the first three narrower than the 

 others, with the following headings, and in the proper column 

 make your record. 



Date Hour Tern. Sky Wind Rain 



Under sky, report clear, if blue with here and there white 

 clouds; cloudy, if nearly the whole sky is covered; overcast, 

 if of one uniform gray with sun invisible. 



Under wind, give the direction; and light, variable, 

 strong, or steady as case may be. 



Rain, light or heavy. 



