Notes
Significant figures notes
Content of the notes (2)
Page 1
- Significant figures are important because they tell us how to round and the important thing is to make sure that the answer you get isn't more precise than the numbers you started with.
- When the digits are wrong you look at the digits you divided or multiplied them for, you see how many digits there are and thats how many digits you leave while rounding it up.
- the lower number is when rounding p the number.
- the density is mass/ volume
82g/42cm3=1.952380952g/cm^3 82g/42cm^3=2.0g/cm^3
without significant figures with significant figures
82.103217g/42.338572cm^3=1.9123351gcm^3