Measurements
g/cm3 or g/mL
Units on density
The ability to float in a fluid
Buoyancy
Buoyant force of object is greater that the gravitational force. What happens?
The object floats.
Mass divided by volume
Density
The amount of space an object takes up.
Volume
digital scale
used to measure mass
Acts in the opposite direction as buoyant force.
Gravity
The weight of a ball displaced in water is less than its buoyant force. What happens?
The ball floats.
How can you change an object's density?
By increasing/decreasing mass or volume
The buoyant force acting on a submerged object is equal to the weight of the fluid the object displaces.
Archimedes' Principle
mL, cm3
Units of volume
The upward force excerted on an object submerged in the fluids.
Buoyancy
Mr. Nemo (fish) will have neutral Buoyancy. What happens next?
It will flink. Will neither float or sink.
Which will result in positive buoyancy?
a. When the buoyant force is greater than the force of gravity
b. When the buoyant force is equal to the force of gravity
c. When the buoyant force is less than the force of gravity
a. When the buoyant force is greater than the force of gravity
g, kg
units of mass
True/False: Water is the only fluid that can provide buoyancy.
False
The object is denser than the fluid. What happens next?
The object sinks.
What does buoyancy depend on?
a. The size of an object.
b. The color of an object.
c. The weight of an object.
C. the weight of an object
If this substance takes up 6ml of space, what is its mass?
6 grams
How could you make plastic sink and steel float?
a. You can't
b. Change the shape and therefore surface area
c. Remove some mass
b. Change the shape and therefore surface area