Calendar: 1848-1849 Page 263

applied sciences 2G1 lbs What work must be done to cause this body to revolve with an angular velocity of about Λ1 Α Β is an uniform beam in horizontal position its middle point round which it may freely turn Ur string perpendicular to Β small fixed pulley and Γ weight also is equal to If IV be allowed to descend find its velocity when it has gone down given distance supposing the weight of and of Β to be equal 71 10 Find the strain upon when has turned through an angle 45 Find also the greatest angular elevation to which will rise -Ci cmt$tn Describe the method of taking the specific gravity of powder insoluble in water Upon what does the draught of common chimney depend Give illustrations of the applications of heat by processes of con- vection Explain what is meant by evaporation and state the cir- cumstances which accelerate or retard the process What do you understand by the diffusiveness of gas State the relation between the specific gravity and the diffusiveness of gases and describe the mode of ascertaining the rate of diffusion