Identify at least 2 possible sources of error in the procedure to determine density.

The divisions of your instruments are your main sources of error. Density is mass x volume (or something like that).

So 2 instruments you will be using are:

Pan Scale (mass)
Ruler or measuring device (volume)

How accurate are these instruments and what are the divisions. With this information you can work out the percentage area, and the actual range that your answer could be between.

Remember when you multiply 2 quantities which were gathered manually, you are in fact adding the percentage error's, so the unanimous percentage error increases.


Just to note, when you are measuring volume, did you use rulers/micrometers (solid), or a volumetric flask/cylinder (liquid)?

Erare est humanum, human error is a major one

"Human Error" is a terrible answer, because it is vague and meaningless. Be more specific than that. How accurate were the instruments you used? How precise were they? Were there steps in the procedure where something could have happened that affected the results? How would it have affected the results? That's what is meant by Sources of Error. "Human Error" is bogus - anyone can say that without really knowing what they're talking about.

Je veux justifier en francais SVP... L'erreur humain c'est un peu vrai.. car c'est sure qu'il you un erreur avec la presicion de nos mains(hands error ) encore il 'ya l'erreurs avec les materiels.. ce sont les 2 types d'erreurs.Merci.

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Originally Posted by sassour

je veux justifier en francais SVP....L'erreur humain c'est un peu vrai..car c'est sure qu'il ya un erreur avec la presicion de nos mains(hands error ) encore il 'ya l'erreurs avec les materiels..ce sont les 2 types d'erreurs.Merci.

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Le probleme c'est qu'en tant qu'etudiants, on ne peut pas dire de telles choses! Cette idee est bonne, mais on attend des reponses plus precises de notre part.