## Constant Question

$\lambda=\frac{h}{p}$

105194078
Posts: 52
Joined: Thu Sep 19, 2019 12:17 am

### Constant Question

Does it make it a big difference if you switch the constant from 6.626 to 6.63 for p?

Debora Fernandez Clemente_ 4H
Posts: 52
Joined: Wed Sep 18, 2019 12:21 am

### Re: Constant Question

Usually just use the constant they give in the equation sheet, which I believe is usually 6.626*10^-34 J*s. Rounding up sometimes can eventually lead your answer to be slightly off from the real answer, so it is better to be more precise with your constants.

Yailin Romo 4G
Posts: 109
Joined: Wed Feb 20, 2019 12:16 am

### Re: Constant Question

It might not make that big of a difference and my ta has stressed again and again that as long as your answer is close enough to the actual answer it shouldn't be counted as wrong.

AlyshaP_2B
Posts: 112
Joined: Wed Sep 18, 2019 12:19 am

### Re: Constant Question

I don't think it will change your answer too much, but if you're rounding at multiple steps during the process then your final answer won't be as accurate as it could. If possible, I would avoid rounding as much as possible until getting to the final step.

405268063
Posts: 102
Joined: Thu Jul 25, 2019 12:17 am

### Re: Constant Question

On tests, I personally would just use all of the figures in the constants the sheet gives you to get the most accurate number. Even in doing informal practice problems, I would use 6.626 because changing the number to 6.63 will give you a slightly different answer and sometimes you don't know if it's because you missed a step in the problem or because you just substituted a constant.

VioletKo3F
Posts: 103
Joined: Sat Sep 07, 2019 12:18 am

### Re: Constant Question

I would use whatever value is given on the equation sheet to be safe. Rounding should always come at the end so don't be lazy when doing the calculations.

MAC 4G
Posts: 121
Joined: Wed Sep 18, 2019 12:16 am

### Re: Constant Question

I think it's best to use the value you are given rather than rounding. However, if you do choose to your answer shouldn't be off by that much. My TA has mentioned that if you are within a certain range, specific to each TA, you'll still receive full credit. Personally, I'm one to write out all of the steps so sometimes I short hand (round) when I'm writing it out, but when I plug it into the calculator I type out the full value. If you are doing it for your own practice I don't see a problem with rounding, but for a test/exam, it would be better to use the full value.

Nathan Nakaguchi 1G
Posts: 102
Joined: Wed Sep 18, 2019 12:22 am
Been upvoted: 1 time

### Re: Constant Question

Personally, I would use whatever number is more accurate. In test scenarios I would go for every digit given on the constants sheet. It shouldn't be too much of a big deal though to opt for 6.63 so long as it is clear that you're using that number and your answer is pretty much the same.