Significant figures

[barydos]

In a problem, am I allowed to use exact values (stored in my calculator) in my calculations at each step (but i would write the answers at each step to the appropriate sig fig)... and then in the final answer, my answer would be written once again in the appropriate significant figures whilst being really 'accurate' (because of the use of exact values throughout the calculations)?

Or, do I have to answer each step to the appropriate sig fig, and then use that sig fig'd answer with any followup calculations?

I hope that made sense... also just curious if anyone on this board knows whether the physics has the EXACT same expectations as in chem or not?

[PrinceOfPersia]

I'm fairly certain that physics does not expect answers to the appropriate significant figure. However from what I have heard from my teacher, you should give answers to 2-3 decimal places throughout ur workings but keep the numbers stored. This is just for physics, I'm not sure for chem

[paulsterio]

Always use exact numbers in calculations - i.e. the value stored in your calculator.

Regarding physics - yes, physics does not require you to use correct significant figures, but it's good manners to.

[Limista]

Always use exact numbers in calculations - i.e. the value stored in your calculator.

Also if the final answer is to be given in 3 significant figures (for example), you should write down all numerals DURING the calculation to 3 significant figures. The examiners like this & it reminds you how many significant figures you should give your final answer to.

[GreenLemon]

Definitely write your final answer to the correct number of significant figures in chemistry. As for your working, it doesn't matter whether your write out all numerals or values to the appropriate sig. figs. The key thing is that you're consistent. Pick one that suits you, and stick to it.

Also, only one mark at most will be deducted for the inappropriate use of significant figures. Or at least that's how they used to do it when they had mid-years, so don't stress too much.

[barydos]

Alright thanks everyone