Umakant Kondapure, Collin Fernandes, Nipun Bhatia, Vikram Bathula and, Ketki Deshpande Solutions for Chapter: Friction in Solids and Liquids, Exercise 4: Evaluation Test

An aquarium is filled with water. The lateral wall of the aquarium is $50 \mathrm{cm}$ long and $40 \mathrm{cm}$ high. Using $10 \mathrm{m} {\mathrm{s}}^{-2}$ for the acceleration due to gravity, and $1 \mathrm{g} {\mathrm{cm}}^{-3}$ for the density of water, the force on the lateral wall of the aquarium is

The fire fighters have a jet attached to the head of their water pipes

The nature of graph between terminal velocity of spherical body moving in a viscous liquid versus the square of its radius is best represented by:-

The terminal velocity of freely falling body is

Assertion: The accumulation of snow on the wings of an aeroplane reduces the lift.

Reason: Pressure difference depends upon the curvature.

The figure below indicates flow of water through a tube of uniform cross-section with a constant speed in the direction as shown by the arrows. On the tube, water exerts:-

A water barrel having water up to a depth $d$ is placed on a table of height $H$. A small hole is made on the wall of the barrel at its bottom. If the stream of water coming out of the hole falls on the ground at a horizontal distance $r$ from the barrel, then, the value of $d$ is

An incompressible, non-viscous liquid of density $\rho$ flows through a horizontal tube as shown below. The flow condition is steady. Area of the cross-section at $A$ and $B$ are $a_1$ and $a_2$ respectively. The height difference of liquid in two tubes inserted at $A$ and $B$ is $h$.