Embibe Experts Solutions for Chapter: Properties of Matter, Exercise 2: Exercise 2

A spherical ball of iron of radius $2 \mathrm{mm}$ is falling through a column of glycerine. If densities of glycerine and iron are respectively $1.3\times {10}^3 \mathrm{kg} {\mathrm{m}}^{-3}$ and $8\times {10}^3 \mathrm{kg} {\mathrm{m}}^{-3}$. $\eta$ for glycerine $=0.83 \mathrm{N} {\mathrm{m}}^{-2} \sec$, then the terminal velocity is

A rain drop of radius $0.3 \mathrm{mm}$ has a $\mathrm{terminal} \mathrm{velocity} \mathrm{in} \mathrm{air}$ $=1 \mathrm{m} {\mathrm{s}}^{-1}$. The viscosity of air is $8\times {10}^{-5} \mathrm{poise}$. The viscous force on it is

A cylinder is filled with non-viscous liquid of density d to a height $h_0$ and a hole is made at a height $h_1$ from the bottom of the cylinder. The velocity of the liquid issuing out of the hole is

The terminal velocity depends upon

The velocity of efflux of a liquid through an orifice at the bottom of a large tank does not depend upon

The lift of an air plane is based on

Horizontal tube of non-uniform cross-section has radii of $0.1 \mathrm{m}$ and $0.05 \mathrm{m}$ respectively at $M$ and $N$ for a streamline flow of liquid the rate of liquid flow is

Two drops of the same radius are falling through air with a steady velocity of $5 \mathrm{cm} {\mathrm{s}}^{-1}$ . If the two drops coalesce, the terminal velocity would be