Constants


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Joseph Hsing 2C
Posts: 93
Joined: Wed Sep 30, 2020 9:42 pm

Constants

Postby Joseph Hsing 2C » Sat Oct 24, 2020 12:00 pm

How many decimals are we expected to use for constants like the speed of light and Planck's constant for the midterm?

Brian Bui 3H
Posts: 96
Joined: Wed Sep 30, 2020 9:42 pm

Re: Constants

Postby Brian Bui 3H » Sat Oct 24, 2020 12:48 pm

I don't believe there's an expected number of places after the decimal, but the more you use, the more accurate your answer will be.

Immi Lee - 1D
Posts: 101
Joined: Wed Sep 30, 2020 9:58 pm

Re: Constants

Postby Immi Lee - 1D » Sat Oct 24, 2020 1:15 pm

If you want to be safe I'd recommend using the constants that are written on the formula sheet!

Nathan Tong 3G
Posts: 91
Joined: Wed Sep 30, 2020 9:49 pm

Re: Constants

Postby Nathan Tong 3G » Sat Oct 24, 2020 1:32 pm

From what I have heard, the midterm will be multiple choice, so you won't need to worry too much if you rounded a little differently. I'd say that using several decimal places would be on the safe side, but as long as you're close it should be fine.

Shalyn Kelly 3H
Posts: 84
Joined: Wed Sep 30, 2020 9:55 pm

Re: Constants

Postby Shalyn Kelly 3H » Sat Oct 24, 2020 1:33 pm

Hi! Yep, basically what's been said above. I'd use what's on the constants sheet, but the more the merrier (especially when using a calculator).

Brandon Gruender 3F
Posts: 91
Joined: Wed Sep 30, 2020 10:03 pm

Re: Constants

Postby Brandon Gruender 3F » Sat Oct 24, 2020 1:57 pm

I would use how ever many are shown on the sheet of equations and constants that we print out, but the more that you use the closer your answer will be to the correct answer.

Olivia Monroy 1A
Posts: 103
Joined: Wed Sep 30, 2020 10:00 pm

Re: Constants

Postby Olivia Monroy 1A » Sat Oct 24, 2020 2:03 pm

Use what Lavelle's constant sheet gives us! He always uses 3x10^8 and 6.626x10^-34 for the constants you mentioned.

Emma_Barrall_3J
Posts: 95
Joined: Wed Sep 30, 2020 9:55 pm

Re: Constants

Postby Emma_Barrall_3J » Sat Oct 24, 2020 3:08 pm

I would use the numbers provided on the formula sheet. Because the test is multiple choice, if your answer is slightly different due to slightly different constants, you can just choose the closest answer!

Colin Squire 3B
Posts: 90
Joined: Wed Sep 30, 2020 9:35 pm

Re: Constants

Postby Colin Squire 3B » Sat Oct 24, 2020 3:32 pm

The midterm will be multiple choice so I'm sure your answer doesn't need to be exactly on the dot. To be safe though, I'd recommend using the given values on the equations sheet we were given.

Austin Aldujaili 2D
Posts: 91
Joined: Wed Sep 30, 2020 9:46 pm

Re: Constants

Postby Austin Aldujaili 2D » Sat Oct 24, 2020 3:33 pm

There is no specification but I recommend using as many as possible ESPECIALLY when dealing with very small numbers like moles for instance. I have gone through some molecular formula problems and got varying answers solely because I did not use exact amounts for the molar masses.

Emma Strassner 1J
Posts: 92
Joined: Wed Sep 30, 2020 9:50 pm

Re: Constants

Postby Emma Strassner 1J » Sat Oct 24, 2020 5:00 pm

Hi, I agree with what is said above. Use the amount that is specified on the formula sheet and try to avoid rounding many decimal places until the end of the problem to get the closest decimal possible. It will make it easier to match your answer to whatever is closest on the multiple choice!

Lilly Catarozoli 1B
Posts: 109
Joined: Wed Sep 30, 2020 9:53 pm

Re: Constants

Postby Lilly Catarozoli 1B » Sat Oct 24, 2020 5:01 pm

My TA said to use as many as the worksheet gives but to make sure your answer has the correct amount of sig figs.

Evelyn Silva 3J
Posts: 94
Joined: Wed Sep 30, 2020 9:42 pm

Re: Constants

Postby Evelyn Silva 3J » Sat Oct 24, 2020 5:59 pm

I recommend using the same amount as in the worksheet given to us and try to keep as many decimal places you can in between calculations. Since the midterm is multiple choice then you can just pick whatever answer is the closest to yours.

Hailey Kang 2K
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Joined: Wed Sep 30, 2020 10:03 pm
Been upvoted: 1 time

Re: Constants

Postby Hailey Kang 2K » Sat Oct 24, 2020 6:00 pm

Hi!

For the midterm, I would recommend using exactly what is on the constants and equations sheet. Since the test is multiple choice, I'm sure all the answers will be rounded, but you will get a more accurate answer that way.

Brianna Chen 3F
Posts: 103
Joined: Wed Sep 30, 2020 10:11 pm

Re: Constants

Postby Brianna Chen 3F » Sat Oct 24, 2020 6:04 pm

I like to use at least three decimal places, but the more numbers you use, the more accurate your answer will be. If you have a graphing calculator, you can also copy the exact answer and apply it into the equation you are solving for.

Joseph Hsing 2C
Posts: 93
Joined: Wed Sep 30, 2020 9:42 pm

Re: Constants

Postby Joseph Hsing 2C » Sat Oct 24, 2020 6:33 pm

Got it thanks everyone! ^^

Nicolette Simoni 3L
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Re: Constants

Postby Nicolette Simoni 3L » Sat Oct 24, 2020 6:53 pm

Hi!

I would just follow the exact constants on the formula sheet! :) ex.) using 2.998 over 3.00 for the speed of light will give you a more precise answer!

David Jen 1J
Posts: 96
Joined: Wed Sep 30, 2020 9:33 pm

Re: Constants

Postby David Jen 1J » Sun Oct 25, 2020 2:36 am

I like to use whatever is on the formula sheet to like 4 decimals.

Simi Kapila_3E
Posts: 95
Joined: Wed Sep 30, 2020 9:40 pm
Been upvoted: 1 time

Re: Constants

Postby Simi Kapila_3E » Sun Oct 25, 2020 11:04 am

I don't think it has ever been specified how many to use. Bu the more you use, the more accurate your answer will be. So if possible, I think it would be better to use more.

apurva-3E
Posts: 142
Joined: Wed Sep 30, 2020 9:59 pm

Re: Constants

Postby apurva-3E » Sun Oct 25, 2020 11:06 am

Use the ones on the formula sheet!

Sean Phen
Posts: 107
Joined: Wed Sep 30, 2020 10:01 pm

Re: Constants

Postby Sean Phen » Sun Oct 25, 2020 11:09 am

I definitely recommend using the constants provided for us on this midterm. But, I don't think it matters as long as you are somewhat close to the answer then you should be able to reach the correct answer as it is all multiple choice.

DPatel_2L
Posts: 100
Joined: Wed Sep 30, 2020 9:41 pm

Re: Constants

Postby DPatel_2L » Sun Oct 25, 2020 2:44 pm

I would use the constants that are given on the sheet.


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