What will be the kinetic energy of a proton if the de Broglie wavelength associated with a proton is `165Å` ?

Explanation

To find the kinetic energy of a proton given its de Broglie wavelength of 165 Å, we can follow these steps:

### Step 1: Convert the de Broglie wavelength from angstroms to meters
1 angstrom (Å) = \(1 \times 10^{-10}\) meters.
Thus, \(165 \, \text{Å} = 165 \times 10^{-10} \, \text{m} = 1.65 \times 10^{-8} \, \text{m}\).

### Step 2: Use the de Broglie wavelength formula
The de Broglie wavelength (\(\lambda\)) is related to the momentum (p) of a particle by the formula:
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