Measurements
Density= MASS divided by VOLUME
Define density
The measurement of how much mass of a substance is contained in a given volume.
slave; master
What is the formula for finding pressure?
Pressure = Force / Surface Area
Define buoyancy
The tendency of the material to rise or float in a liquid.
Steel boats float because they _______.
Displace their own weight in water
Less than or equal to 1.0g/mL
What is the density of an object the floats in water?
What does Archimedes' principle state?
If the weight of the water displaced is less than the weight of the object, the object will sink
Otherwise the object will float, with the weight of the water displaced equal to the weight of the object.
measure of the force of gravity acting on a body / the pull of the Earth on an object
How do submarines move up to the surface and sink to the depths of the ocean?
They fill their ballast tanks with air to float and fill their tanks with water to sink
What does Pascal's Law state?
a pressure change at any point in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere.
Define hydraulics
Using fluids to multiply forces
What forces are at work in determining whether or not a boat floats?
Buoyant and gravitational force
What are the units for pressure? What does this unit mean?
Pascal (Pa) = 1 Newton per square meter
How will you find the volume of an irregular object?
By submerging the object in water and measuring how much the volume of the water increases. This amount of displaced water represents the volume of the submerged object.
Define fluid and give two examples.
Example: liquids and gases
Which principle does hydraulics apply? What does this principle state?
Pascal's principle, which states that pressure applied to a confined fluid is transmitted equally in all directions