## Planck's Constant Value [ENDORSED]

$E=hv$

Fiona Grant 1I
Posts: 30
Joined: Fri Apr 06, 2018 11:03 am

### Planck's Constant Value

When we are doing calculations involving Planck's constant, h, I was just wondering if it is better to use 6.626 x 10^-34 J.s or 6.63 x 10^-34 J.s? I've seen it both ways and I was just curious. Thanks!

Natalie Noble 1G
Posts: 30
Joined: Thu Feb 01, 2018 3:02 am
Been upvoted: 1 time

### Re: Planck's Constant Value

I don't think it makes a difference. If we are taking a test, they give us a page with formulas and constants so I would just use whatever is on that. Personally, I prefer to use 6.626 x 10^-34 because it has higher accuracy since it goes to more decimal places.

Nicole Shak 1L
Posts: 35
Joined: Wed Nov 22, 2017 3:03 am

### Re: Planck's Constant Value

I think for intermediate calculations it's always safer to put more decimals for a greater accuracy.

danielruiz1G
Posts: 62
Joined: Fri Apr 06, 2018 11:04 am

### Re: Planck's Constant Value

It depends on significant figures rules and if you're multiplying/dividing or adding/subtracting

Amir Akhavan 1E
Posts: 34
Joined: Fri Apr 06, 2018 11:01 am

### Re: Planck's Constant Value

It is always safer to use whatever is given on the formula sheet. However, more decimals will give a more exact answer which may be preferred.

yazminedesan1F
Posts: 40
Joined: Thu Feb 15, 2018 3:00 am

### Re: Planck's Constant Value  [ENDORSED]

I would use whats given or whatever has more decimals just to be more accurate

Hope_Pham_1G
Posts: 29
Joined: Fri Apr 06, 2018 11:04 am

### Re: Planck's Constant Value

For homework, I like to use the more accurate value for Planck's constants. For tests, I use 6.626 x 10^(-34) because the tests are timed, and it's faster to input this version.

shouse1f
Posts: 63
Joined: Fri Sep 28, 2018 12:18 am

### Re: Planck's Constant Value

since I think the value is usually given I would use whichever they give.