Obtain the dimensions of Planck's constant.

Explanation

To obtain the dimensions of Planck's constant (h), we can use two different approaches based on known physical relationships. Here’s a step-by-step solution:

### Step 1: Use the de Broglie wavelength formula
The de Broglie wavelength (λ) is given by the formula:
\[ \lambda = \frac{h}{p} \]
where \( h \) is Planck's constant and \( p \) is the momentum of a particle.

### Step 2: Identify the dimensions of the de Broglie wavelength
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