The initial speed is $\"\"$ .

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The final speed is $\"\"$ .

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The electron moving parallel to a uniform electric field increases its speed from $\"\"$ to $\"\"$ over a distance of $\"\"$ .

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Find the acceleration of the electron.

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Apply formula: $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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The electric field strength is $\"\"$ .

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$\"\"$ .

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Apply formula: $\"\"$ .

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$\"\"$

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$\"\"$ .

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Substitute mass of the electron $\"\"$ , charge of the electron $\"\"$ and $\"\"$ .

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$ .

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The electric field strength is $\"\"$ .