Calendar: 1899-1900 Page 784

cxxxii FACULTY OF SCIENCE and double weighing for obtaining the true weight of body when using false balance How would you test the truth of Boyle's Law for pree- sures less than one atmosphere glass tube open at both ends and of uniform cross section is immersed in deep trough of mercury so that only ins of the tube are above the surface The upper end is now closed and the tube raised so that 30 ins stand above the surface of the mercury in the trough If the barometric height at the time is 30 ins what is the height of the mercury in the tube above that in the trough Describe method of finding the specific gravity of an insoluble powder such as sand Show that the result is really the specific gravity' according to its strict definition Give numerical example Describe briefly Bramah's Press If the diameter of the small plunger is inch and that of the large plunger 15 ins and the arms of the lever handle ins and feet respectively what is the force transmitted to the ram when weight of 56 lbs is hung on the end of the handle Define the term coefficient of cubical expansion of substance What is the volume at 100 of cube of copper which is exactly inches along each edge at 20 if the coefficient of linear expansion of copper is 000018 When is vapour said to be saturated What essential difference is there between saturated vapour and gas How would you find the pressure of water vapour when saturated at temperature of say 25 Define specific heat piece of platinum of specific heat 032 is heated to 1000u and dropped into times its weight of water at 12 what will be the final temperature What is meant by thermal conductivity Describe an experiment by which the conductivity for heat of two metals could be compared 10 Describe experiments showing that different surfaces have different radiating powers different absorbing powers and discuss the relation between and