Ideas realized from class demonstrations
Volume is measured
in cubic units. (cubic cm, cubic m, cm3, mm3, etc)
Volume is the amount of space the object takes up.
A cube has width, base, and height (V = w*b*h)
A cylinder’s volume is calculated (V=πr2h)
A sphere’s volume is calculated V=4/3 πr3)
submerged in a fluid will displace an amount of fluid that is equal to the volume of the object.
Displace: to move out of the way and put something else in its place.
have the property of density.
Density is the relationship between mass and volume.
d=m/v v=m/d m=dv
= 1 cc = 1 mL (1cubic centimeter = 1 milliliter)
Ideas realized from PhET Density Lab.
The density of an element is unique.
computing the density of a sample, you can determine what it is.
The density of water is 1.0 Kg/L.
An object with a density less than the fluid in which it rests will FLOAT.
Example : An object with a density less than 1.0 Kg/L will FLOAT in water.
An object with a density greater than the fluid in which it rests will SINK
Example: An object with a density greater than 1.0 Kg/L will SINK in water.
An object with a density that is equal to the fluid in which it rests will HOVER.
Example: An object with a density that is equal to 1.0 Kg/L will HOVER in water.
volume will alter density.
naval ships are made from metal, that if it were in a large lump, would sink.
Increasing the volume without
increasing mass causes a decrease in density.