1
What is the formula for density?
d = m/v
A measure of the amount of matter in a body.
mass
The resistance or reluctance of the object to change its state of rest or motion. (The mass of a body resists a change in the state of rest or motion of the body).
Inertia
What are the three states of matter?
solid, liquid and gas
hardness
the ability to withstand scratches
SI unit of density
kg/m^3 (g/cm^3)
What is the SI unit of mass?
kilogram (kg)
True or False
An object with more mass has greater inertia.
True
What is matter?
Anything that has mass and takes up space.
Made-up of constantly moving particles with kinetic energy
How do you calculate the volume of irregular solids?
volume of object,V is given by V=V2-V1
An object ______ if its density is less than that of the medium it is in.
float
What instruments can we use to measure mass?
beam balance, electronic balance, scale.
Error regarding eye placement
Parallax error
Define solid.
matter that has a definite shape and definite volume.
molecules are close together, uniform and vibrating
Who is Archimedes?
answer my vary
Aluminium has a density of 2.7g/cm^3. The mass of the block of aluminium was found to be 21.6g. What is the volume.
v=m/d
v=21.6g/2.7g/cm^3
v=8.0cm^3
What is the formula to calculate volume of something cuboid?
v=lxwxh
What can you use to measure the volume of irregular objects?
eureka can/displacement can/measuring cylinder
What are the five main classes of materials?
glass, ceramic, fibres, metal and plastic
What is the boiling point for water?
100 degrees Celsius
The surroundings or environment of an object (ex. fluid)
medium
Measuring mass precautions
level horizontal ground, hard surface, free from vibrations.
How do you take readings of liquids
top and bottom of the meniscus
mercury - top
water - bottom
Refers to its ability to support heavy loads without breaking or tearing.
strength
solid --> liquid
melting point