ISCI 2002 Exam 2

Density=

Density

Density Example:

Density of Water

Volume=

Mass=

Pressure

Pressure=

Pressure

Water Tower

When an ice cube in a glass of water melts, the water level

Buoyancy in a Liquid

Archimede's Principle

Apparent weight of a submerged object

If a 3-kg block submerged in water apparently "weighs" 1kg, then the buyoant force or weight of water displaced is 2kg

Bouyant force is greater on an empty steel barge when it is:

Buoyant force is greater on a submarine when it is:

What is the weight of water displaced by a 100-ton floating ship?

Displacement rule:

Place a stone in a container that is brim-full of water, and the amount of water overflow equals the volume of the stone

Buoyant force is equal to the weight of fluid displaced

Understood by pressure differences

Principle of flotation

The reason a person finds it easier to float in salt water, compared with fresh water, is that in salt water:

Buyoyant force-

The Archimede's Principle-

Both liquids and gases are considered fluids

Objects float in fluids because an upward force acting on it is greater than the downward force of its weight

An object will float in a fluid if its average density is less than the density of the fluid

An object will sink if its average density is greater than the density of the fluid

An object will be in equilibrium at any submerged depth in a fluid if the average density of the object and the density of the fluid are equal

When an object floats, some of it is submerged, displacing enough volume so that the buoyant force equals the weight force

A fish normally displaces its own:

Ships float because the average density of the ship is less than the water it would displace

Oil floats on water,

Cream floats on milk,

By taking in, or pumping out water, submarines can vary their buoyancy.

Is there a buoyant force acting on your classmates at this moment?