Advertisements
Advertisements
प्रश्न
A block of Ag of mass x kg hanging from a string is immersed in a liquid of relative density 0.72. If the relative density of Ag is 10 and tension in the string is 37.12 N then compute the mass of Ag block.
Advertisements
उत्तर
From the terminal velocity condition, FG – U = F F = T, m = x
`"mg" - "mg"((ρ_"w")/ρ)` = T
`"mg" [1 - 0.72/10]` = 37.12
9.8x [1 – 0.072] = 37.12
9.0944x = 37.12
x = 4 kg
APPEARS IN
संबंधित प्रश्न
Derive Poiseuille’s formula for the volume of a liquid flowing per second through a pipe under streamlined flow.
Why two holes are made to empty an oil tin?
A small metal sphere of mass M and density d1, when dropped in a jar filled with liquid moves with terminal velocity after sometime. The viscous force acting on the sphere is (d2 = density of liquid and g = gravitational acceleration)
Choose the CORRECT statement.
In motors, more viscous oil is used in summer than in winter due to ____________.
The velocity of water in river is 8 km/hr of the upper surface. The river is 12 m deep. If the coefficient of viscosity of water is 10-2 poise then the shearing stress between horizontal layers of water is ______.
With increase in temperature, the viscosity of ______.
- gases decreases.
- liquids increases.
- gases increases.
- liquids decreases.
The velocity of a small ball of mass 0.3 g and density 8 g/cc when dropped in a container filled with glycerine becomes constant after some time. If the density of glycerine is 1.3 g/cc, then the value of viscous force acting on the ball will be x × 10-4 N, and the value of x is ______.
[use g = 10 m/s2]
Define the coefficient of viscosity.
State the formula and S.I. units of coefficient of viscosity.
