Fluid Mechanics

Question 1

When pressure is applied to a fluid, the pressure change is transmitted to every part of the fluid without any loss. Which of the following laws explains this phenomenon?

Answer 1

Pascal’s Law

Question 2

Which force helps swimmers float in water?

Answer 2

Buoyant Force

Question 3

Why do water droplets always take a round shape when dropped onto plane surfaces?

Answer 3

Due to exertion of surface tension by the molecules

Question 4

What will happen if a glass bottle is completely filled with water, sealed with a lid and put into a freezer?

Answer 4

Eventually, the ice will burst the glass bottle

Question 5

Lactometers (used to determine the purity of a sample of milk) and hydrometers (used to determine the density of liquids) are based on the _______ principle.

Answer 5

Archimedes

Question 6

What is the relative density of silver?

Answer 6

10.8

Question 7

The buoyant force exerted on an object fully or partially submerged in a fluid medium ( gas or liquid ) is equal to the weight of the fluid that the body displaces.” This principle is :

Answer 7

Archimedes’ Principle