unit conversions

Moderators: Chem_Mod, Chem_Admin

Agustina Santa Cruz 2F
Posts: 88
Joined: Wed Sep 30, 2020 10:01 pm

unit conversions

Postby Agustina Santa Cruz 2F » Sun Oct 18, 2020 7:46 pm

When converting units do you just multiply by 10^x given number or is there a different way? For example if I convert centi to giga, I multiply the number I'm converting by 10^9 and leave it in scientific notation?

Joyce Pang 2H
Posts: 59
Joined: Wed Sep 30, 2020 9:59 pm

Re: unit conversions

Postby Joyce Pang 2H » Sun Oct 18, 2020 8:28 pm

Leaving it in scientific notation would be best since you need to account for sig figs and all.

Mina Tadros 3L
Posts: 88
Joined: Wed Sep 30, 2020 9:38 pm

Re: unit conversions

Postby Mina Tadros 3L » Sun Oct 18, 2020 8:33 pm

When doing conversions, I usually use 10^x (x being all real numbers). This simplifies my conversions since I do not have to waste my time writing out the full value.

Dane_Beasley_1E
Posts: 68
Joined: Wed Sep 30, 2020 9:42 pm

Re: unit conversions

Postby Dane_Beasley_1E » Sun Oct 18, 2020 11:27 pm

I think the best way is just to do 10^x. It also keeps it in scientific notation for sigfigs.

Kathy_Li_1H
Posts: 85
Joined: Wed Sep 30, 2020 9:31 pm

Re: unit conversions

Postby Kathy_Li_1H » Thu Oct 22, 2020 6:31 pm

Hi! I think it would be best to leave your numbers in 10^x/scientific notation form just because it preserves the sig figs and also prevents you from getting confused. Hope this helps!

rita_debbaneh2G
Posts: 93
Joined: Wed Sep 30, 2020 9:57 pm

Re: unit conversions

Postby rita_debbaneh2G » Sun Nov 01, 2020 8:32 pm

The most common way I see conversions presented when looking at conversion charts is essentially x•10^y. I think for the sake of leaving things uncomplicated, this would probably be the best way to go. Also, it keeps sig figs consistent.

Mauricio Maravilla 3C
Posts: 50
Joined: Wed Sep 30, 2020 9:33 pm

Re: unit conversions

Postby Mauricio Maravilla 3C » Tue Nov 03, 2020 3:45 pm

Okay then, so I was working on a Heisenberg's Indeterminacy question and the one thing from preventing me from the answer were the units of conversions.
I needed to get my answer in meters per second but I kept getting it in

( Joule-Seconds ) / ( meters * kilograms )

After looking around on the internet it turns out that those units are somehow equal to meters per second

1 ( Joule-Second ) / ( meters * kilograms ) = 1 ( meter ) / ( second )

Can anyone explain how that makes any sense???
Thanks

ShinwooKim_3E
Posts: 85
Joined: Wed Sep 30, 2020 10:00 pm

Re: unit conversions

Postby ShinwooKim_3E » Wed Nov 04, 2020 12:41 am

Agustina Santa Cruz 2F wrote:When converting units do you just multiply by 10^x given number or is there a different way? For example if I convert centi to giga, I multiply the number I'm converting by 10^9 and leave it in scientific notation?

I usually leave the answer as x 10^x!

Giselle_zamora_1L
Posts: 64
Joined: Wed Nov 13, 2019 12:18 am
Been upvoted: 1 time

Re: unit conversions

Postby Giselle_zamora_1L » Sun Nov 22, 2020 1:31 pm

does anyone have any useful tips for converting SI units for the final or is it just straight up practice makes perfect kind of thing ?

tholz11
Posts: 70
Joined: Wed Sep 30, 2020 9:38 pm

Re: unit conversions

Postby tholz11 » Sun Nov 22, 2020 5:46 pm

I think it's best to leave it in scientific notation. Simpler and easier to check your work (-:

JaylinWangDis1L
Posts: 88
Joined: Wed Sep 30, 2020 10:09 pm

Re: unit conversions

Postby JaylinWangDis1L » Sun Nov 22, 2020 5:57 pm

Giselle_zamora_3E wrote:does anyone have any useful tips for converting SI units for the final or is it just straight up practice makes perfect kind of thing ?


I feel like it is more of a practice makes perfect kind of thing! The equation sheet usually provides the more commonly used conversion units. Just make sure you start with what you're given and use those conversion units and make sure they cancel out. You'll be left with what you are trying to convert to. It definitely helps to cross out the units (not the numerical value) as you cancel them so you can see what units are left.

Dane_Beasley_1E
Posts: 68
Joined: Wed Sep 30, 2020 9:42 pm

Re: unit conversions

Postby Dane_Beasley_1E » Sun Nov 22, 2020 9:46 pm

I agree with many of the people in this post. Keeping it in scientific notation will be best for consistency in calculations, and it keeps the answer in sigfigs.

Bai Rong Lin 2K
Posts: 86
Joined: Wed Sep 30, 2020 9:54 pm

Re: unit conversions

Postby Bai Rong Lin 2K » Sun Nov 22, 2020 10:24 pm

Agustina Santa Cruz 2F wrote:When converting units do you just multiply by 10^x given number or is there a different way? For example if I convert centi to giga, I multiply the number I'm converting by 10^9 and leave it in scientific notation?

I believe leaving it at 10^x would be the best as it would leave it in sig fig already.

TiffanyBrownfield 2I
Posts: 78
Joined: Wed Sep 30, 2020 9:42 pm

Re: unit conversions

Postby TiffanyBrownfield 2I » Sun Nov 22, 2020 11:47 pm

I don't really see another way to do it, besides writing out the full values and multiplying them, but that wouldn't be efficient. I would definitely say to just keep it in scientific notation when performing your calculations.

Alessia Renna 1D
Posts: 51
Joined: Wed Sep 30, 2020 9:36 pm

Re: unit conversions

Postby Alessia Renna 1D » Sun Dec 06, 2020 9:41 pm

I would say to just do 10^x

ShinwooKim_3E
Posts: 85
Joined: Wed Sep 30, 2020 10:00 pm

Re: unit conversions

Postby ShinwooKim_3E » Mon Dec 07, 2020 6:05 pm

I usually leave it as 10^x.

Morgan Gee 3B
Posts: 90
Joined: Wed Sep 30, 2020 9:48 pm

Re: unit conversions

Postby Morgan Gee 3B » Wed Dec 16, 2020 7:23 am

Whenever I do conversions, I personally always write out the units, which helps me deal with the different magnitudes of size. I do this with scientific notation. For example, if I were to convert 357 nm to m, I would do 357 nm (1 m/1 x 10^9 nm).

805593945
Posts: 43
Joined: Wed Sep 30, 2020 9:36 pm

Re: unit conversions

Postby 805593945 » Wed Dec 16, 2020 8:59 am

Leave it in scientific notation, it's not worth the hassle.

805593945
Posts: 43
Joined: Wed Sep 30, 2020 9:36 pm

Re: unit conversions

Postby 805593945 » Wed Dec 16, 2020 8:59 am

Leave it in scientific notation, it's not worth the hassle.

Juliana Rosales 1H
Posts: 100
Joined: Wed Sep 30, 2020 9:43 pm

Re: unit conversions

Postby Juliana Rosales 1H » Wed Dec 16, 2020 3:32 pm

I personally just leave it

Melissa Solis 1H
Posts: 100
Joined: Wed Sep 30, 2020 10:08 pm

Re: unit conversions

Postby Melissa Solis 1H » Wed Dec 16, 2020 4:23 pm

I think the best way is to leave it in the scientific notation because then you'll have to deal with all the decimals and it gets messy.

LeahSWM 2E
Posts: 71
Joined: Wed Sep 30, 2020 9:47 pm

Re: unit conversions

Postby LeahSWM 2E » Wed Dec 16, 2020 4:55 pm

Leave it in scientific notation, it'll give the same answer!

Lauren Strickland 1B
Posts: 84
Joined: Wed Sep 30, 2020 9:47 pm

Re: unit conversions

Postby Lauren Strickland 1B » Wed Dec 16, 2020 5:37 pm

I find it helpful to leave it in scientific notation.

Brandon Carris
Posts: 49
Joined: Wed Sep 30, 2020 9:41 pm

Re: unit conversions

Postby Brandon Carris » Wed Dec 16, 2020 7:47 pm

Yea scientific notation is just way simpler especially dealing with big or small numbers.

205323697
Posts: 50
Joined: Tue Feb 25, 2020 12:15 am

Re: unit conversions

Postby 205323697 » Thu Dec 17, 2020 9:23 am

When we leave it in scientific notation, how many decimal places to we keep?


Return to “SI Units, Unit Conversions”

Who is online

Users browsing this forum: No registered users and 2 guests