Question

Hi friends,answer this question
A cylindrical beaker of mass 1.3 kg contains 1.5 1 of water. The beaker is placed on a scale and a rock of mass 2.2 kg is totally immersed in
the water (rock is not touching the bottom of the beaker). The water level rises by
2 cm. The diameter of the beaker is 0.14 m.

a) What mass does the scale measure before the rock is lowered into the water?

b)what is the density of the rock?

c)what mass does the scale measure after rhe rock is lowered into the water ?​

Answer 1

Explanation:P.S:i will be taking the mass of water as 1.5Kg,what you have specified in the question is unclear.

mass of beaker = 1.3kg ,mass of water = 1.5kg,therefore total mass before immersion of rock = 2.8Kg

volume of water raised = πr²h,where h = volume of water raised.

=22/7 *(7)²*2

= 308 cm³= volume of the rock

density of rock = mass/volume = 2200/308,= 7.14 g/cc

after immersion of rock,scale measure of scale = (2.8+2.2) Kg

= 5 kg.