Calendar: 1885-1886 Page 696

688 GENERAL LITERATURE AND SCIENCE FIRST YEAR The side of vessel is rectangle diagonal is drawn dividing the rectangle into two triangles shew that if the vessel is full of liquid the pressure on one triangle is three times the pressure on the other An accurate balance is totally immersed in vessel of water in one scale-pan some glass of density 25 is being weighed and exactly balances mass of 450 grammes of substance of density which is placed in the other scale find the real mass of the glass Enunciate Boyle's law To what extent does this law hold good flask is connected by means of fine metal tube with the upper extremity of one of two vertical glass tubes which are filled with mercury and are connected with each other at the bottom The mercury is allowed to run out of both tubes until there is difference of level of cms Find the capacity of the flask assuming that the increase of volume of the air in the flask produced by letting out the mercury is 16 cubic cms and that the height of the barometer at the time is 75 cms Deduce formulae for finding the density of the air in receiver connected with an air-pump with pressure gauge after any number of strokes of the piston weight thermometer containing 100 grammes of mercury at is immersed in vessel of oil After removing the thermometer from the oil it is found that 2'54 grammes of mercury have been expelled The coefficient of apparent expansion of mercury in glass being 00154 determine the temperature of the oil Describe Regnault's apparatus for determining the pressure of aqueous vapour at different temperatures How may the results obtained by him be used in calculating the height of mountain Illustrate by means of an example the method of determining the temperature of furnace from knowledge of the thermal capacity of platinum