Question 1 :
The type of braking system referred to as power brake makes use of<br/>

Question 3 :
Assertion: The excess pressure above atmospheric pressure is usually called as gauge pressure. Reason: Gauge pressure $=$ (Total pressure) - (atmospheric pressure)

Question 5 :
A small metal sphere of radius $a$ is falling with a velocity $v$ through a vertical column of a viscous liquid. If the coefficient of viscosity of the liquid is $\eta $, then the sphere encounters an opposing force of:

Question 7 :
A small hollow sphere, which has a small hole in it, is immersed in water to a depth of 0.5 m before any drop penetrates into it. If surface tension for water is 0.073 N/m, the radius of the hole is :[Assume pressure inside the sphere to be atmospheric pressure]

Question 9 :
When the left arm of a mercury manometer is connected to a cylinder filled with a gas, the level of the mercury in the right arm rises by 2 cm. If the pressure of the gas in the container 110160 Pa, the atmospheric pressure is __________cm of Hg. ( take $g=10 &#160;&#160;m &#160;&#160;s^{-2}$)

Question 10 :
Work done in blowing a soap bubble of radius $R$ is $W$. The additional amount of work done to increase its radius to $\sqrt { 3 } R$ is :

Question 11 :
Two small drops of mercury, each of radius R, coalesce to form a single large drop. The ratio of the total surface energies before and after the change is :-<br>

Question 13 :
A small steel ball falls through a syrup at a constant speed of 10 m/s. If the steel ball is pulled upwards with a force equal to twice its effective weight, how fast will it move upwards?

Question 14 :
A liquid is flowing in a horizontal uniform capillary tube under a constant pressure difference p. The value of pressure for which the rate of flow of the liquid is doubled when the radius and length both are doubled, is

Question 15 :
Match column I with column II :<br><table class="wysiwyg-table"><tbody><tr><td>List I</td><td>List II</td></tr><tr><td>Magnus energy</td><td>Pascal's Law</td></tr><tr><td>Loss of Energy</td><td>Archimedes' principle</td></tr><tr><td>Pressure is same at same level in a liquid</td><td>Viscous force </td></tr><tr><td>Hydraulic Machines</td><td>Lifting of asbestos roofs</td></tr></tbody></table>

Question 16 :
Three containers are used in a chemistry lab. All containers have the same bottom area and the same height. A chemistry student fills each of the containers with the same liquid to the maximum volume. Which of the following is true about the pressure on the bottom in each container?

Question 17 :
A cube of Ice is floating in water. The fraction of its length lie outside the water is (sp. Gravity of Ice $= 0.96$)