Buoyancy

Tested in 2 real MPSC questions across 2 years (2019–2021). See it in context on the interactive Concept Graph →

Years it was asked

2021 2019

Real questions that test this

कोष्टकात दिल्याप्रमाणे घनता असणाऱ्या सोन्यापासून आणि तांब्यापासून जर 0.50 kg. च्या समान वजनाचे दोन गोळे (चेंडू) बनवले तर / According to densities given in the table, if we prepare two spheres out of Gold and Copper each of a similar weight of 0.50 kg., then

1)सोन्याचा गोळा तांब्याहून मोठा असेल / The Golden sphere will be bigger than copper

2)सोन्याचा गोळा तांब्याहून लहान असेल / The Golden sphere will be smaller than copper&check; Correct

3)दोनों गोळे आकाराने समानच होतील / Both the spheres will be of same size

4)सोन्याचा गोळा तांब्याच्या तुलनेत बरोबर 19.30/8.96 एवढ्या आकाराचा होईल. / Golden sphere will be exactly 19.30/8.96 times than copper.

Density equals mass divided by volume (Density = Mass / Volume). Since gold has a much higher density than copper, for the same mass (0.50 kg), gold will occupy less volume, meaning the golden sphere is smaller.

जर पाण्याची घनता 1000 kgm⁻³ आणि तांब्याची घनता 8.9 × 10³ kgm⁻³ असेल तर तांब्याची सापेक्ष घनता किती ? If density of water is 1000 kgm⁻³ and density of copper is 8.9 × 10³ kgm⁻³. What is relative density of copper ?

a)8.9&check; Correct

b)8.9 kgm⁻³

c)8.9 × 10⁶

d)8.9 × 10⁻⁶

Relative density is the ratio of the density of a substance to the density of water. Since it's a ratio of identical units, it is a dimensionless quantity, making 8.9 the correct answer.

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