Density
What is the formula for density?
mass divided by volume
What are the units used to measure pressure in SI?
Pascals (Newtons/ square meter)
What is a fluid?
Liquid & Gas
What is the SI unit typically used for density when measuring liquids.
grams per milliliter (g/mL)?
What is the formula used to solve for pressure?
Pressure = Force / Area
How does a snowboard help keep a person from sinking into the snow when going down the mountain?
A snowboard spreads the person's weight over a larger surface area, reducing pressure and preventing sinking.
What is the density of a chocolate bar that has a mass of 220 g and a volume of 110 cm3?
Density = 220 g / 110 cm³ = 2 g/cm³
Who is the Greek scientist famously discovered principles of buoyancy while taking a bath.
Archimedes
A steel ship floats, even though steel is denser than water, how does this happen?
The hollow shape increases volume and displaces more water due to the design feature.
Explain what would happen to pressure if you increase the force?
Pressure increases.
Describe Archimedes’ Principle in your own words.
Archimedes’ Principle states that the buoyant force on an object is equal to the weight of the fluid displaced by the object.
Why does adding salt to water make it easier for objects to float?
Salt increases water's density, making it easier for objects to float.
When salt is added to water, its density increases. This makes floating easier or harder?
Easier
Explain what would happen to pressure if you increase the area?
Pressure decreases
A block of wood floats in water, but sinks in oil. List the objects in order of least dense to most dense
Why does a helium balloon sometimes float close to the ground for a while before it finally falls completely?
As helium slowly leaks, the balloon becomes less buoyant and sinks gradually.
In which direction does pressure exerted by a fluid push?
Pressure in fluids is exerted in all directions.
According to Archimedes’ Principle, the buoyant force is equal to this.
the weight of the fluid displaced