Calendar: 1877-1878 Page 604

602 ENGINEERING AND APPLIED SCIENCES glass with an angle nearly equal to two right angles is placed with its two equal faces equi-distant from point of light describe and explain the appearance presented on screen at some distance behind the prism 10 What are the laws of the vibration of stretched strings Account for the division of string into vibrating segments 11 On what properties does the velocity of sound in any substance depend Describe method of determining the velocity of sound in any substance Tbe velocity of sound in water is four times that in air Give the reasons for this FIRST YEAR How is the pressure at point in fluid measured Find the pressure in grammes per square centimetre at the depth of mile in sea-water whose specific gravity is 1Ό26 mile 160933 centimetres and cubic centimetre of fresh water gramme Explain the meaning of the term specific gravity bottle filled with water weighs 222 grammes 50 grammes of filings are thrown in and the water which flows over is removed still leaving the bottle just filled The bottle then weighs 264 grammes The weight of the bottle when empty being 10 grammes determine the specific gravity of the filings Enunciate Boyle's law barometer is filled with mercury before inverting up to within one inch of the top After the inversion the air expands till it occupies 15 inches of the tube and the mercury stands 28 inches in the tube above the level of the mercury in the trough Find the true height of the barometer at the time Describe some form of single-acting air-pump and show how to determine the density of the air in receiver after any number of strokes the volume of the receiver and cylinder being known The correct length of steel chain for land measurement it 66 feet Express as decimal of an inch the difference between