Trusted by millions of Kenyans
Study resources on Kenyaplex

Get ready-made curriculum aligned revision materials

Exam papers, notes, holiday assignments and topical questions – all aligned to the Kenyan curriculum.

In an experiment to determine the density of a liquid, a uniform metal cylinder of cross-sectional area 6.2 cm2 and length 4.5 cm was hang...

In an experiment to determine the density of a liquid, a uniform metal cylinder of cross-sectional area 6.2 cm2 and length 4.5 cm was hang from a spring balance and lowered gradually into the liquid. The upthrust was determined for various submerged lengths. The results obtained are shown on the graph in figure 1.
physics652017817.jpg
Using the graph, determine:
(i) The value of the upthrust when the cylinder is fully submerged.
(ii) The density of the liquid.

Answers


John
(i) Up thrust (from graph) = 0.49 N

(ii) Up thrust = weight of liquid displaced = 0.49 N

Mass of liquid displaced, m = 0.049 kg = 49 g

Volume of liquid displaced, v = 6.2 x 4.5 = 27.9 cm 3

Density = $\frac{m}{v}$ = $\frac{49}{27.9}$ = 1.756g/ cm 3
johnmulu answered the question on June 5, 2017 at 05:25

Answer Attachments

Exams With Marking Schemes

Related Questions