If the velocity of a body is decreased to 1/2, then K. E. of the body decreases to​

1/4th

Explanation:

KE = .5mv^2

So when we decrease the velocity by half, we end up losing three fourths of net energy due to that value being squared.

The Kinetic Energy is reduced to 1/4 of the original K. E.

Explanation:

K. E. = 1/2 m v^2

If v becomes v/2 we have:

K E. = 1/2 m (v/2)^2

= 1/2 m v^2/4

So dividing the 2:

we get  1/2 m v^2/4 /  1/2 m v^2

= v^2/4 / v^2

= v^2 / 4v^2

= 1/4.

b. atoms in metallic solids are not arranged in a regular pattern

explanation:

c8h10 is your answerr