Calendar: 1883-1884 Page 653

APPLIED SCIENCES 649 -esistance of the wire is equal to half the total resistance of the circuit 12 Explain the principle of action of dynamo-machine flat coil of wire is caused to rotate about an axis in its 3wn plane explain any electrical effect which maybe induced in the wire by the earth's magnetic action FIKST YEAR uniform cube of metal having an edge of 10 centi- metres is fastened to one end of wire and suspended in water so that centimetres of the wire are wetted Determine the pressure in grammes on each of the faces of the cube when the point of attachment of the wire is at the centre of one of the faces when it is at one corner of the cube ut piece of iron when plunged in vessel full of water makes grammes run over When placed in vessel full of mercury it floats displacing 39 grammes of mercury Re- quired the weight volume and specific gravity of the iron Mercury is poured into tube closed at one end to point inch from the open end The tube is then inverted into trough of mercury when it is found that the air fills 15 inches of the tube while column of mercury 28 inches high is sustained below it Find the true barometric height Describe the ordinary double-barrelled air-pump and deduce formula for determining the density of the air after any number of strokes Describe the construction of the weight tliermometer If the co-efficient of relative expansion of mercury in glass be what mass of mercury will overflow from weight thermometer which contains 400 grammes of mercury at when the temperature is raised to 100 gas initially at volume 5000 cubic centimetres tern- perature 10 and pressure represented by 60 centimetres of mercury has its pressure increased to 70 centimetres of