1) What is Archimedes principle? Describe an activity related to it.
2)What is buoyancy? Describe it with an activity.
3) Name the areas in which Archimedes principle is applicable.
For details on Archemedes' principle, please have a look at the link given below:
Lactometer :-It is based on the Archemedes' principle. When we put loctometer inside the liquid it experience buoyant force(weight of displace fluid). Hence measure relative density in the given scale of loctometer. Lower the density of liquid farther, the lactometer will sink.
It is basically a glass tube with a round shaped bottom containing a liquid of certain density inside it. The liquids will rise/fall inside the tube depending upon the pressure and depth.
For few more practical applications of Archemedes' principle, please refer to the link provided below:
Buoyancy:-
When an object is immersed partially or fully in a liquid, it experiences an upward force. This upward force is known as buoyant force and this phenomenon is known as buoyancy. Buoyancy is also known as up thrust.
The force of buoyancy is given as,
F = Vρg
where V is the volume of the liquid displaced,
ρ is the density of liquid and
g is acceleration due to gravity.
Buoyancy helps ships and boats to float on water, helium balloons in air etc.
FB is the force of buoyancy.
Mg = weight of object.