acting angle arithmetical axis ball base beam body centre circle common concave containing convex cylinder described determine difference direction distance Divide double earth's elastic equal equation Express extremity fall feet fixed fluid focal length focus force four geometrical given given weight greater half horizontal immersed inches incident inclined plane known lens less means miles mirror move Multiply object observed opposite parallel passing person placed plane position pressure Problems progression projected proportion prove pully quantities radii radius ratio rays reflected refracted respectively rest shew shillings sides space specific gravity sphere square string Subtract supposing surface taken third tower triangle twice velocity vertical weight whole
Σελίδα 29 - A man travelled 105 miles, and then found that if he had not travelled so fast by 2 miles an hour, he should have been 6 hours longer in performing the journey.
Σελίδα 28 - There is a cistern, into which water is admitted by three cocks, two of which are of exactly the same dimensions. When they are all open, five-twelfths of the cistern is filled in four hours; and if one of the equal cocks be stopped, seven-ninths of the cistern is filled in ten hours and forty minutes.
Σελίδα 58 - A person standing at the edge of a river observes that the top of a tower on the edge of the opposite side subtends an angle of 55° with a line drawn from his eye parallel to the horizon ; receding backwards 30 feet, he then finds it to subtend an angle of 48°. Determine the breadth of the river. log. sin 7° = 9.08589 log.
Σελίδα 38 - At a game of cards, 3 being dealt to each person, any one can have 425 times as many hands as there are cards in the pack. How many cards are there 1 12.
Σελίδα 95 - A descends alone ; the pressure of the atmosphere is equal to that of a column of water...
Σελίδα 27 - Fifteen guineas should weigh four ounces ; but a parcel of light gold having been weighed and counted, was found to contain 9 more guineas than was supposed from the weight ; and a part of the whole, exceeding the half by four guineas and a half, was found to be 1-^ oz.
Σελίδα 37 - If the first has to the second the same ratio which the third has to the fourth...
Σελίδα 30 - For every yard of the better sort he gave as many shillings as he had yards in all ; and for every yard of the worse as many shillings as there were yards of the better sort more than of the worse. And the whole price of the better sort was to the whole price of the worse as 72 to 7. How many yards had he of each ? Ans.