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Today, 18:21

Planck's constant is approximately equal to which of the following?

The product of the uncertainties in electron position and electron momentum.

The sum of the uncertainties in electron position and electron momentum.

The ratio of the uncertainties in electron position and electron momentum.

The difference of the uncertainties in electron position and electron momentum.

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  1. Today, 20:27
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    Henlo!

    Bohr's model was unable to calculate or it required precise information about position of an electron and its velocity. It is very difficult to calculate velocity and position of an electron at the same time because electron i too small to see and may only be observed if peturbed, for example we could hit the electron with another particle such as photon or an electron, or we could apply electric or magnetic field to the electron. This will inevitably change the position of the elctron or its velocity and direction. Heisenberg aid that more precisely we can define the position of an electron, the less certainity we are able to define its velocity and vice versa.

    In short, first option is correct one
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