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Thread: Momenergy Formula

  1. #1 Momenergy Formula 
    The Doctor Quantime's Avatar
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    E^2 = p^2c^2 + m0^2c^4

    Where E = energy
    Where p = momentum
    Where c = the speed of light
    Where m0 = rest 'mass' in energy

    Can anyone please work out this forumula for me to make p the subject and then find a way to dispose of v so that all we have left is the energy?

    In other words, p = ev (or p = mv) the m here being the mass in energy. Once ev is the subject (as p) can you find a way to get rid of v in favour of just having v please? My rearranging maths is terrible. Please can someone help me.

    Thanks,

    SVWillmer


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    Forum Professor serpicojr's Avatar
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    I'm sure the folks in the physics forum are fully capable of doing the mathematical manipulations for you. They may be more interested in doing so, in fact, as they may have some desire to see the end product. FOr future reference, mathematicians don't jump up and down when asked to take square roots or eliminate variables.

    On a related note, if you want to be a good physicist, I feel that you should be able to do the calculations yourself. Feel free to come up with a handful of physicists who made it big despite having poor mathematical foundations, I'll just come back with major physicists with solid grasps of mathematics and, moreover, mathematical giants who have made fundamental contributions to physics.


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    Quote Originally Posted by serpicojr
    I'm sure the folks in the physics forum are fully capable of doing the mathematical manipulations for you. They may be more interested in doing so, in fact, as they may have some desire to see the end product. FOr future reference, mathematicians don't jump up and down when asked to take square roots or eliminate variables.

    On a related note, if you want to be a good physicist, I feel that you should be able to do the calculations yourself. Feel free to come up with a handful of physicists who made it big despite having poor mathematical foundations, I'll just come back with major physicists with solid grasps of mathematics and, moreover, mathematical giants who have made fundamental contributions to physics.
    How can I learn if nobody teaches me? Thats what this forum helps me with-education. I'd help anyway gladly here. Yet your more likely to work out something trivial than when someone may want help. Please help me, I'd help you.
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  5. #4  
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    Okay, what's your background in math? Please give me explicit and truthful details. Beating around the bush or lying about your credentials will not help me in helping you.
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  6. #5  
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    Quote Originally Posted by serpicojr
    Okay, what's your background in math? Please give me explicit and truthful details. Beating around the bush or lying about your credentials will not help me in helping you.
    Not much. My math level is an average level 2 qualification. I can grasp most mathematic concepts reasonably easy however. Algebra is my strong point, but rearranging and completeing formulas are not my strong point. Hence, my problem.
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    You say algebra is your strong point, but rearranging equations is your weak point. This is incongruous with my education. In the states, high school algebra is essentially rearranging equations. Any student in the second semester of an elementary (pre-university) algebra course would know how to do what you're asking me to do. So how much algebra do you know? What topics have you covered?
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  8. #7  
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    Quote Originally Posted by serpicojr
    You say algebra is your strong point, but rearranging equations is your weak point. This is incongruous with my education. In the states, high school algebra is essentially rearranging equations. Any student in the second semester of an elementary (pre-university) algebra course would know how to do what you're asking me to do. So how much algebra do you know? What topics have you covered?
    I know that ab can = c. I can do substitution very well.
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  9. #8  
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    Quote Originally Posted by serpicojr
    Beating around the bush… will not help me in helping you.
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  10. #9  
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    Look do you wanna help me or not? Cos if you don't I'll do it myself.
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  11. #10  
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    Please do not get indignant when I give you the conditions under which I will help you and you choose not to respect them.

    If you want me to help you, you have to let me know what I am working with. It would be wasteful for me to cover material you already know and simply useless to discuss topics for which you do not have sufficient background.

    Now, if you can do it yourself, then you don't need my help. I'd be happy to see what you come up with and to check your math.

    Here's a little hint... if you want to take the square root of something, write something like:

    -sqrt(something)
    -(something)^0.5
    -(something)^(1/2)
    -(something)<sup>0.5</sup>
    -(something)<sup>1/2</sup>

    and not:

    -/------------ something
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  12. #11  
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    Quote Originally Posted by serpicojr
    Please do not get indignant when I give you the conditions under which I will help you and you choose not to respect them.

    If you want me to help you, you have to let me know what I am working with. It would be wasteful for me to cover material you already know and simply useless to discuss topics for which you do not have sufficient background.

    Now, if you can do it yourself, then you don't need my help. I'd be happy to see what you come up with and to check your math.

    Here's a little hint... if you want to take the square root of something, write something like:

    -sqrt(something)
    -(something)^0.5
    -(something)^(1/2)
    -(something)<sup>0.5</sup>
    -(something)<sup>1/2</sup>

    and not:

    -/------------ something
    Thank you.
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