Combining Formulas: Rearrange Equations for F (No Ev)

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Homework Help Overview

The discussion revolves around rearranging two equations to isolate F as the subject while excluding Ev from the final expression. The context involves concepts related to energy and possibly wave mechanics.

Discussion Character

  • Exploratory, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants discuss the initial steps of combining equations that express Eph and suggest replacing Eph in both equations. There are attempts to simplify the equations and isolate F, with some questioning the correctness of the rearrangements.

Discussion Status

Some participants have provided guidance on how to approach the problem by suggesting steps to combine the equations. There are multiple interpretations of the rearrangement process being explored, and while some participants express confidence in the correctness of the attempts, explicit consensus on the final form has not been reached.

Contextual Notes

There is a mention of a picture attachment that likely contains the equations in question, which may not be accessible to all participants. The original poster's request emphasizes the need to exclude Ev from the final equation.

gareth01422
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Hi guys

I have question in my homework to rearrange 2 equations. see picture attached.

the equation has to have F as the subject and not have Ev in the equation.

Can someone point me in the right direction please

Gareth
 

Attachments

  • Capture1.JPG
    Capture1.JPG
    2.5 KB · Views: 452
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Hi,
I´ll help you with the first step:
Both formulas express Eph.
So you have to replace Eph in both of them and write the remaining parts as one equation.
Then the rest should be easy.
Greetings,
Firelion
 
Last edited:
Firelion said:
Hi,
I´ll help you with the first step:
Both formulas express Eph.
So you have to replace Eph in both of them and write the remaining parts as an equation.
Then the rest should be easy.
Greetings,
Firelion

Ah right.

Thanks for the help by the way.

I have attached my first atempt. Is this correct or could you tell me where I have gone wrong?

Gareth
 

Attachments

  • Capture2.JPG
    Capture2.JPG
    7.3 KB · Views: 416
Maybe what I'm saying is stupid, but can't you simply put them together?
By doing so, you would have:

hc*t/b= h*f
then you can transform it into

f= hc*t / (b*h)

EDIT: pardon me...I haven't seen that someone had already answered...
 
Seems perfectly correct to me.
 
Firelion said:
Seems perfectly correct to me.

Brilliant

Thanks for the help guys.

Gareth
 

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