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Rearranging formula

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    I need some help with rearranging formula.
    the first one is. Make r the subject of the formula:
    H = w^2 / 2g (R^2 - r^2)
    and the second one is. Make a the subject of the formula:
    T = (Sqrt pbh / 4 + a^2)

    Please give some working along with the answer
    Thanks in advance
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    (Original post by kszyni1)
    I need some help with rearranging formula.
    the first one is. Make r the subject of the formula:
    H = w^2 / 2g (R^2 - r^2)
    and the second one is. Make a the subject of the formula:
    T = (Sqrt pbh / 4 + a^2)

    Please give some working along with the answer
    Thanks in advance
    Are you still stuck? What have you tried?
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    (Original post by SeanFM)
    Are you still stuck? What have you tried?
    I've rearranged the second one but I'm stuck on the first one I'm not sure how to get rid of the brackets and all of the powers :/
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    (Original post by kszyni1)
    I've rearranged the second one but I'm stuck on the first one I'm not sure how to get rid of the brackets and all of the powers :/
    As you've written it it is ambiguous.

    Is it  H = \frac{w^2}{(2g) \times (R^2 - r^2)}?
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    yes
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    Everytime I see this topic, I fully get disgusted
    God just needs to help I do well tbh

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    (Original post by kszyni1)
    yes
    If you multiply both sides of equation by  R^2-r^2 and divide both sides by  H you get
     \displaystyle  R^2-r^2=\frac{w^2}{2gH} .
    Can you do anything from here?
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    (Original post by B_9710)
    If you multiply both sides of equation by  R^2-r^2 and divide both sides by  H you get
     \displaystyle  R^2-r^2=\frac{w^2}{2gH} .
    Can you do anything from here?
    I'm fine form there thanks a lot
 
 
 
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