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**1. Homework Statement**

an electron is trapped in a sphere whose diameter is 52 x 10-15 m. What is the minimum uncertainty in the electron's momentum?

**2. Homework Equations**

I know that the uncertainty in the electron's position is equal to the diameter... but how do I set up the equation?

**3. The Attempt at a Solution**

p = h / d. I plugged in 6.626E-34 for h and the diameter given. Is this correct?