Calendar: 1882-1883 Page 661

658 APPLIED SCIENCES Explain the methods commonly employed for proving Boyle's law for pressures greater and for pressures less than that of the atmosphere State clearly how far this law holds good for different gases and for different temperatures volume of 1000 cubic centimetres of air under pres- sure of 76 centimetres of mercury and at temperature of 15 are heated to temperature of 100 and at the same time the pressure is increased to 77 centimetres find the resulting volume Describe the construction of weight thermometer and illustrate by an example the mode of determining with this thermometer the apparent expansion of mercury in glass What are the laws which concern the evaporation of liquids What is the hygrometric state' of the air How is it determined by Regnault's hygrometer Give short account of Regnault's investigations on the maximum tension- of aqueous vapours at different temperatures mass of iron weighing 500 grammes is heated to 100 and afterwards plunged into 500 grammes of water at 15 contained in copper vessel whose weight is 130 grammes specific heat of copper 095 find the temperature of the water after the addition of the iron י Define latent heat The vessel in the previous question contained 400 grammes of water at 30 and sufficient ice was introduced to lower the temperature to find the weight of ice added 10 Define the absolute thermal conductivity of substance in centimetre gramme second limits bar of metal whose absolute conductivity is whose length is 10 centimetres and whose cross section is £ square centimetre is placed with one extremity in boiling water whilst the other extremity is placed in ice find how many grammes of ice will be melted in half an hour