ATAR Notes: Forum

VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: jto1292 on November 10, 2010, 09:47:39 pm

Title: Losing marks on SIGNIFICANT FIGURES
Post by: jto1292 on November 10, 2010, 09:47:39 pm

How can we totally prevent this? I never get it right!

Title: Re: Losing marks on SIGNIFICANT FIGURES
Post by: jasoN- on November 10, 2010, 09:49:07 pm

if it helps, I would highlight the smallest sig figs in each question (I don't do this just saying)

Title: Re: Losing marks on SIGNIFICANT FIGURES
Post by: Stroodle on November 10, 2010, 09:51:08 pm

Pretty sure you only lose one mark over the whole exam for sig figs, if that's any consolation.

Title: Re: Losing marks on SIGNIFICANT FIGURES
Post by: jto1292 on November 10, 2010, 09:52:17 pm

Say they have a numbers like 12.44 and 130 and our answer was 1450. Do we make it 1.5 x 10^3?? And thanks for suggestion

Title: Re: Losing marks on SIGNIFICANT FIGURES
Post by: jasoN- on November 10, 2010, 09:53:19 pm

well 3 sig figs there, so you would do 1.45 x 10^3

Title: Re: Losing marks on SIGNIFICANT FIGURES
Post by: jto1292 on November 10, 2010, 09:53:36 pm

14.5 x 10^2?

Title: Re: Losing marks on SIGNIFICANT FIGURES
Post by: jasoN- on November 10, 2010, 09:54:25 pm

essentially the same thing, but 1.45 x 10^3 is more simplified

Title: Re: Losing marks on SIGNIFICANT FIGURES
Post by: jto1292 on November 10, 2010, 09:54:49 pm

Sorry I'm really feeling under-prepped for tomorrow :/

Title: Re: Losing marks on SIGNIFICANT FIGURES
Post by: jto1292 on November 10, 2010, 09:55:39 pm

Thankyou! I will work at remembering how to do it :D