Question

A hydrometer is a device used to measure the density of a boud. It is a cylindrical tube weighted at one end, so that it floats with the heavier end downward. The tube is contained inside a large medicine droppet into which the liquid is drawn using the sucre bulb (see the drawing). For use with your car marks are put on the tube so that the level at which floats indicates whether the leadis battery acid (more dense) or antifreeze (less dense). The hydrometer has a weight of W - 6.09 * 10 N and a cross-sectional area of A - 6.84 * 10m ". How far from the bottom of the tube should the mark be put that denotes (a) battery acid (- 1250 kg/m ) and (b) antifreeze ( 1073 kg/m)? (a) 0.709 (b) A-0546

Answer 1

A)

Distance, d = W/(pgA)

d = 0.0609/(1280 x 9.8 x 6.84 x 10^-5)

W = 0.071 m

B)

Distance, d = W/(pgA)

d = 0.0609/(1073 x 9.8 x 6.84 x 10^-5)

W = 0.085 m

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