science
how do you find the density of an object?
mass divided by volume
how do you find the mass of an object?
density x volume
how do you find the volume of an object?
mass divided by density
what is the unit for density?
kg/m3 or g/cm3
whats the unit for mass?
kg or g
whats the unit for volume?
m3 or cm3
does a solid move freely?
no they are tightly packed together
what is potential energy?
how spaced out (far apart) particle in a system are
what is kenetic energy?
the movement energy of a particle
what is the equation to find internal energy?
kinetic energy + potential energy
whats internal energy?
the total sum of kinetic energy and potential energy of all particals in a substance
whats specific heat capacity?
how many joules of heat energy are needed to raise the temp of one kg of a substance by one degree
what is the unit of energy?
joules
whats the equation for energy change?
energy change = mass x temp change x SHC
method to find the density of an irregular object:
• weight your object on a scale to find the mass of your object
• fill your eureka can with water so it is level with the spout
• place a measuring cylinder at the end of the spout and place your object into the can
• let the water flow out till it stops
• then go down eye level and see how much is measured to know your volume
•lastly do this equation: mass divided by volume = density
method to find the density of a regular object:
• measure the mass of the object using a scale to get the mass
• measure the length, width, height using a ruler to get the volume
• use the equation: mass divided by volume
what is specific latent heart of fusion?
solid to liquid or liquid to solid (melting or freezing)
what is specific latent heat of the vapourisation?
liquid to gas or gas to liquid (evaportation or condensing)
what is specific latent heat of a substance?
how much energy is needed to change the state of 1kg of substance at constant temp
how many g are in a kg
1000