Archimedes' Life
What was Archimedes famous for shouting after discovering his principle?
"Eureka!"
What does Archimedes' Principle state about submerged objects in fluid?
An object submerged in a fluid experiences an upward force equal to the weight of the fluid displaced.
What is buoyant force?
The upward force exerted by a fluid on a submerged object.
Why do ships float despite their weight?
The buoyant force equals the weight of the water displaced by the ship, allowing it to float.
What is the formula for density?
Density = Mass/Volume.
Which army benefited from Archimedes' understanding of mechanics during WAR?
The Greek army.
What determines if an object floats or sinks according to Archimedes' Principle?
Whether the buoyant force is greater than or less than the object's weight.
What are the two forces acting on an object submerged in a fluid?
Weight (downward force) and buoyant force (upward force).
How do submarines control their buoyancy?
By using ballast tanks to adjust the amount of water inside, controlling their displacement.
What is the relationship between mass, volume, and density?
Density is the mass of an object divided by its volume.
How did Archimedes test the purity of the king's crown?
By using water displacement to measure its density.
What is displaced when an object is submerged in fluid?
The volume of fluid equal to the submerged part of the object.
When does an object float?
When the buoyant force is greater than or equal to the object's weight.
Which instrument is used to measure the density of liquids using Archimedes' Principle?
Hydrometer.
What unit is used to measure the volume of displaced fluid?
Liters or cubic meters.
Archimedes was born in which country?
Greece.
How is the buoyant force related to the displaced fluid?
It is equal to the weight of the displaced fluid
What happens if the weight of the object is greater than the buoyant force?
The object sinks.
What is a lactometer used for?
To measure the purity of milk by determining its density.
Define displacement in the context of buoyancy.
Displacement is the volume of fluid pushed aside by a submerged object.
In which fields did Archimedes make significant contributions?
Geometry and mechanics.
What is the equation representing Archimedes' Principle?
Buoyant Force = Weight of Displaced Fluid.
How does density affect buoyant force?
An object with lower density than the fluid will float, while one with higher density will sink.
Name an everyday life application of Archimedes' Principle besides ships and submarines.
Hydrometers and lactometers.
How can Archimedes' Principle be used to explain why ice floats on water?
Ice has a lower density than water, so the buoyant force is greater than the weight of the ice, causing it to float.