Converting equations
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 Posts: 58
 Joined: Wed Sep 30, 2020 9:44 pm
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Converting equations
Hi,
While I was working on the homework a lot of my problems originated from wrongly converting equations. This occurred with equations as simple as E = hc/lambda
Any tips?
While I was working on the homework a lot of my problems originated from wrongly converting equations. This occurred with equations as simple as E = hc/lambda
Any tips?

 Posts: 59
 Joined: Wed Sep 30, 2020 10:00 pm
 Been upvoted: 1 time
Re: Converting equations
I would recommend writing out each step to the conversion while you're doing it. Sometimes, I find myself doing the steps in my head and skipping writing them down which leads to confusion. Hope that helps!

 Posts: 91
 Joined: Wed Sep 30, 2020 10:11 pm
Re: Converting equations
Hi, I come across this problem a lot too, but it helps me to write out each equation with units every step of the way, without skipping steps. Hope it helps!

 Posts: 109
 Joined: Wed Sep 30, 2020 10:00 pm
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Re: Converting equations
I agree with the people above, but sometimes I get confused if I write down too much and end up forgetting a step like squaring a number. I usually just stop periodically as I'm solving to make sure I'm not missing something before moving on to the next step. Slowing down a little helps save time at the end :)

 Posts: 96
 Joined: Wed Sep 30, 2020 9:42 pm
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Re: Converting equations
Personally I also just don't use the combined equation. Even though it is quicker to use hc/lamda for some reason it confuses me more. So I like to use the individual equations to solve for things and plugin afterwards that way I know exactly what I'm solving for. Hope this helps!

 Posts: 107
 Joined: Wed Sep 30, 2020 9:33 pm
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Re: Converting equations
When I solve the equation, I make sure to write my units out. So for E = hv, I do E Joules = h Joules * seconds / v seconds. It also helps to know that Joules is kgm^2/s^2 in these cases. You want to make sure that all the units cancel out except for the one you are solving for. I hope this helped!

 Posts: 95
 Joined: Wed Sep 30, 2020 9:32 pm
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Re: Converting equations
Hi,
A common tip I would use is to first write down what equations you will be working with right in front of you. From there, I would be sure to write out each step in the process without skipping any details as I am plugging in equations. Finally, I would check at the end to see if the units of both sides match up correctly.
Hope this helps! :)
A common tip I would use is to first write down what equations you will be working with right in front of you. From there, I would be sure to write out each step in the process without skipping any details as I am plugging in equations. Finally, I would check at the end to see if the units of both sides match up correctly.
Hope this helps! :)

 Posts: 94
 Joined: Wed Sep 30, 2020 10:03 pm
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Re: Converting equations
I printed out Lavelle's formula sheet and have just recorded a bunch of common conversions. It has helped me become more familiar with them conceptionally, and I am more confident converting them for assignments.

 Posts: 56
 Joined: Wed Sep 30, 2020 9:33 pm
Re: Converting equations
Hi! Like some commenters said, I like to write down everything before I proceed in solving the problem. I also found reading the problem multiple times to be extremely helpful. Each time I read, I try to make connections between each part and try to have a general idea of which way I'm supposed to proceed. That way I'll have a better idea of which equations to use, and if you have to convert, which equations you have to convert to.

 Posts: 100
 Joined: Wed Sep 30, 2020 9:35 pm
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Re: Converting equations
Also make sure that you place parentheses in the right places when combining multiple steps of an equation, to make sure there aren't PEMDAS issues that could result in a wrong answer!

 Posts: 90
 Joined: Wed Sep 30, 2020 10:00 pm
Re: Converting equations
Ruth Rosales 3D wrote:Hi,
While I was working on the homework a lot of my problems originated from wrongly converting equations. This occurred with equations as simple as E = hc/lambda
Any tips?
I like highlighting or putting different shapes on a specific part of the equation I'm working on, and put a check mark so I know I completed the specific part of that question!

 Posts: 142
 Joined: Wed Sep 30, 2020 9:50 pm
 Been upvoted: 1 time
Re: Converting equations
Like others have said above, I think a good tip would be to write out every step of the problem solving just so you ensure that you are using every value that is required in the calculation. I also recommend writing out all of the units for each value as well because it is a great indication of whether or not you solved the problem correctly. For example, if your units do not cancel out correctly, it would mean that you either used the incorrect value or forgot to convert a value.

 Posts: 95
 Joined: Wed Sep 30, 2020 10:04 pm
Re: Converting equations
I suggest being extremely through, writing out every step with its corresponding units, maybe even a sentence on the side describing what you did during that step before moving on.

 Posts: 96
 Joined: Wed Sep 30, 2020 9:42 pm
Re: Converting equations
Something I'd like to add is to check your units. Like for example if you're calculating the frequency make sure the units you end up with is s^1. This is a very simple example but you can apply it more complicated ones like Joules, where it should be kg x m^2 x s^2.

 Posts: 95
 Joined: Wed Sep 30, 2020 9:48 pm
Re: Converting equations
I personally found that not combining equations is easier for me to understand. I don't have to convert between equations and makes my work seem much more methodical.
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