Calendar: 1882-1883 Page 680

AND ENTRANCE EXHIBITIONS 677 II -ffliui antes airtl Ptypgtcs An incline to the top of hill is 2400 feet long and 300 feet high suppose that man weighing 12 stones has to push barrel weighing stones from the bottom to the top find what force he must exert in pushing parallel to the plane and the total number of foot-pounds of work done in con- veying his own weight and that of the barrel from the bottom to the top stone is thrown horizontally from the top of cliff 400 feet high find when and where it will strike the grouncf Distinguish between kinetic and potential energy cannon ball weighing 50 lbs is moving with velocity of 400 feet per second find the number of foot-pounds of work which it can perform before it is brought to rest Give brief account of any experiment with which you may be acquainted on the velocity of light Draw diagrams to show the formation of an image placed at very great distance from double convex lens at the principal focus and nearer to the lens than the principal focus II -Cijemtetn State the difference in chemical composition between hard and soft waters Point out the chief physical and chemical differences between carbonic oxide and carbonic acid gases How is nitrous oxide obtained Which of the elements are called Halogens and for what reason Explain the difference between oil of vitriol and Nord- hausen sulphuric acid To what occasional impurity in air is the blackening of lead-paint due What is the chemical composition of flint What salt is used ο produce red flame in the manu- facture of fireworks