(adsbygoogle = window.adsbygoogle || []).push({}); Forces between 2 down quarks....could someone please help me : )

Hi

I am going slightly insane with this question I have!!!

"A neutron contains two down quarks at a separation of approximately 10^−15 m. Calculate the strength in newtons of the electrical force between two down quarks at a separation of 1.0 × 10^-15 m."

Now I have used F= k x (Q1 x Q2 / r (squared))

so....

F = 9 x 10^9 x ((1/3) x (-1.6 x 10^-19 C))(squared) / (1.0 x 10^-15 m )(squared)

and I get 25.6 N

Im pretty sure this is wrong, Im sure its much higher than that.

Could anybody tell me where I am going wrong please.

Thanks

Danny

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# Homework Help: Forces between 2 down quarks could someone please help me : )

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