Consider two pairs of neutrons. In each pair, the separation between the neutrons is the same. Can the force between the neutron have different magnitudes for the two pairs?

Write two different vectors having same magnitude.

Find two pairs of integers whose product is +15.

Two A.P.'s have the same common difference. The first term of one A.P. is 2 and that of the other is 7. Show that the difference between their 10th terms is the same as the difference between their 21th terms, which is the same as the difference between any two corresponding terms.

Write two different vectors having the same magnitude.

Find the distance between the following pairs of points .