For I/GCSE Physics, it is important to know what is density and how to calculate it.🗣
Density is the mass per volume of a particular substance that you which to find.The more dense an objectis, the heavier it may feel. For example, a cricket ball has a higher density because it weights more and thus has a higher density level. The densityof different materials can be measure using the following formula:
D=M/V
Or in wording terms: density = mass/volume.Here are the density of a few everyday substances.
Steel has a density of 7.82cm³
Water has a density of 1.00cm³
Air has a density of 0.0013cm³
The method to work out the density of an object is simple.Here are some examples.👇🏻
🤯To work out the density of an irregular object:
- First find out the volume of the substance and record it.
- Then find the mass of the substance and record it.
- Follow the equation that you use for density: density = mass/volume
- You will have your answer and make sure it is in cubic centimetres.
*However in a required practical, you may usethe displacement can method.
🌊 To work out the density of a liquid:
- Measure the container you will put the liquid inside and record its mass.
- Put the liquid inside the container and measure its mass now.
- Workout its volume in a measuring cylinder and record it.
- Remember to take the mass of the container away from the mass of the container and the liquid. Using the formula, work out your answer.
🪨How to measure the density of a solid:
- To work out the density of a solid measure the length, width and height and times your answers all together.This is the volume.
- Measure the mass of the cube and record your answer.
- The use the formula of working out the mass.
That's the end of density.
Drafted by Yoko Mak (Physics)