Home › NEET UG › Physics › Mechanical Properties of Fluids › A solid object floats with 80 % of its volume su…
A solid object floats with 80 % of its volume submerged in water (ρ_water = 1000 kg m⁻³). The density of the object is:
A200 kg m⁻³
B800 kg m⁻³
C1000 kg m⁻³
D1200 kg m⁻³
Answer & Solution
Correct answer: B. 800 kg m⁻³
1. By Archimedes', weight of object = weight of displaced water.
2. ρ_obj · V · g = ρ_water · 0.80 V · g.
3. ρ_obj = 0.80 × 1000 = 800 kg m⁻³.
_Source: NCERT Class 11 Physics Ch 9 §9.3 Archimedes' Principle (floating bodies)_
Related questions
A wet paint brush forms a fine tip when lifted from water. This is due to:Surface tension is a property of:Honey needs a bigger force than oil to slide a plate at the same speed. Honey is more:Plaque narrows an artery, blood speeds up there and pressure drops. The artery may:Water leaves a hole in an open tank at the speed of a freely falling body. This is:Above a limiting speed called the critical speed, flow becomes:Where a pipe narrows and streamlines crowd together, the fluid speed:The equation of continuity, Av = constant, expresses conservation of: