Buoyancy
Buoyancy
Tendency of an object to float in fluid
Define density
basic property of all matter, its mass per unit volume (m/v)
Define Specific Gravity
density of a substance compared to the density of water
Define displacement
the amount of water that an object replaces
what is the relationship of the density and the specific gravity of a substance? Why?
They are equal as specific gravity is the density of the substance divided by the density of water (which is equal to one)
A boat can float in water because of ?
Buoyancy
one cubic centimeter is equal to (cm^3)?
one millimeter
instrument used to measure specific gravity
Hydrometer
This person discovered that when an object is placed in water, the water level rises
who is the person?
why does it rise?
Archimedes
displacement
Substance Specific Gravity Density
Aluminum 2.7
Diamond 3.5
Rubber 1.3
what is the density of Aluminum?
what is the specific gravity of a Diamond?
what is the density of Rubber?
Aluminum 2.7 g/cm^3
Diamond 3.5
Rubber 1.3 g/cm^3
If the buoyant force is equal to an object's weight, then the weight of an object in water is equal to ?
Zero
to find the density of a substance, you must measure its what ?
mass and volume
If you know the density of substance , you can easily find this?
Specific Gravity
If a sphere displaces 40ml of water, then its volume is?
40cm^3
what do we know about the density of a substance that floats in water?
It is less than 1g/cm^3
Why is 1cm^3 of ice lighter of 1cm^3 of water?
because the ice has a lesser than density
I float low in a liquid if the liquid has a low specific gravity
Hydrometer
The weight of the water that a floating object displaces is equal to the object's ?
Mass
if the specific gravity of a substance is greater than one, the...its __________ is greater than the density of water?
Density
Is it possible to measure the volume of an object in milliliters?
Yes as 1cm^3 is equal to 1 ml - this was used when we measured the volume of the rock (irregular object)