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how to calculate dimensional formula

Question

how to calculate dimensional formula

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Solution

Sure, here are the steps to calculate the dimensional formula:

  1. Identify the physical quantity: The first step is to identify the physical quantity for which you want to calculate the dimensional formula. For example, let's take the physical quantity 'Force'.

  2. Write down the formula: Write down the formula of the physical quantity. For Force, the formula is F = ma (Force = mass x acceleration).

  3. Write down the dimensions of each quantity: Write down the dimensions of each quantity in the formula. For mass, the dimension is M (Mass), for acceleration, the dimension is LT^-2 (Length/Time^2).

  4. Substitute the dimensions in the formula: Substitute the dimensions in the formula. For F = ma, substituting the dimensions, we get [F] = [M] [LT^-2].

  5. Simplify the formula: Simplify the formula to get the dimensional formula. For the above example, the dimensional formula of Force is MLT^-2.

Remember, the dimensional formula is used to check the dimensional correctness of a given equation. It is based on the principle of homogeneity of dimensions, which states that the dimensions of the fundamental quantities on both sides of an equation must be the same.

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