01 Significant Figures

Bryant discusses how significant figures work!

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[lzyboy92]

thanks, im subscribing, however I have a problem

what if i have 60003 are all the 0s in between significant

and say if i get 60.001 are all the 0s inbetween sig fig aswell?

thanks.

[MyTutorBuddy]

Yes to both. Any zeroes between non-zero digits are significant.

[missclaire2]

thank you soo much because this makes a lot more sense the our textbook. but i have one question:

is 320. the same as 320.0 ?

[MyTutorBuddy]

320. is not the same as 320.0

It just has to do with the rules about 0's.

320. has 3 sig figs - the zero is significant because of the decimal

320.0 has 4 sig figs - the decimal makes ALL 0's to the right of non-zeroes significant.

So 320. says you know the first 3 numbers. 320.0 says you know the first 3 numbers AND are completely certain there is nothing in the tenths place. That's all.

Cheers!

[limeywatermelon]

thank you for the vid. ùi have a question though, how does 3030 with a decimal point at the end have four significant digits? I don't get that. :(

[MyTutorBuddy]

It all has to do with the rules on 0's.

Well, first you know all non-zeroes are significant. The 3's are significant. (That's 2 sig figs so far)

0's between non-zeroes are significant, so the 0 between the 3's (3 sig figs).

0's to the right of non-zeroes are only significant if the number has a decimal in it somewhere. So the last 0 is significant (4 sig figs).

To take it further:

550 = 2 sig figs (no decimal)

550. = 3 sig figs (decimal)

3.0 = 2 sig figs

30 = 1 sig fig

Hope that helps!

[Gugoo96]

@YesItsMeh1992 If you are pissed off, then just close the window. Nobdy wants to hear your hurtful and unhelpful comment.

[YesItsMeh1992]

OMG THAT PISSED ME OFF , THIS WHOLE THING IS USELESS LETS JUST COPY WHAT THE CALCULATOR SAYS OMG , IT TOOK ME 1 WEEK TO UNDERSTAND THEM AND I STILL DONT GET IT !!!!!! DAMN IT

[mattalictoast2]

@useurcamera it was an example. the same rule could be in a number like 3.030. the last zero is significant because there is a decimal. get it

[ExpertNAS]

how to round up number to 1 siginficant figure like 6.8 and 47.6

[PUNCHBOXX]

AWESOME TUTORIAL!

[mephatboi]

30,000 km ---> how many sig figs?

[useurcamera]

im confused. 3030 is the same as 3030.(with decimal)'

all whol numbers even without decimal points on the end are considered that they have decimals. please xplain someone???

[mrphysh]

" those digits that are known with certainty plus one that may be in doubt. " For example an experiment gives 45.7. The actual value might be 45.4 or maybe 46.0 but probably not 47.

And a gut feling for the numbers can be valuable. You weight yourself every morning. One morning you see a weight of 167. You know your weigh is between 165 and 169. It is not exactly 167.

In real science, three sig figs is very good. Two is common and you even see one significant figure.

[KIWI897]

nice thanks needed that

[alstong2]

I wanted to know if you have a vido on converting 8.3mg/dl.convert to g/l