Sources of error in measuring length and mass

[Norah]

Discuss the effects of the following sources of errors on Measurements of length & mass. and suggest metods to overcome them:

1- Existing of a dust on both the sample and the measuring devices.
2- Irregularity of the samples.
3- Slope of the balance from the horizontal line.
4- Other sources.

 

[Norah]

PlZZZZZZZZZZZ HELP TODAY

 

[The Bob]

Do you want to suggest something first? For me, 3 would be as simple as using a 'spirit-level' or horizontal surface to sort out.

The Bob