K.C.S.E Physics Q & A - MODEL 2014PP1QN19

K.C.S.E Physics Q & A - MODEL 2014PP1QN19

Figure 11 shows a test—tube whose cross-sectional area is 2 cm² partially filled with lead shot floating vertically in water.

(Take gravitational acceleration as 10 ms^-2 and density of water p as 1 g cm³)
(a) (i) Determine the:
I volume of the water displaced;
II weight of water displaced.
(ii) State the combined weight of the test—tube and the lead shot.
(iii) Determine the length of the test—tube that would be submerged in a liquid of density 0.8 g cm³
. (b) The set tip in figure 11 can be used as a hydrometer to measure densities of liquids.
State how such a hydrometer would be improved to measure small differences in densities of liquids.

answers