Do you think we should be worried about being exposed to background radiation? Explanation please?

yes

Explanation

yes because radiation can damage your health and if your exposure to radiation is too  high or above average you could get sick or die

HOPE THIS HELPED

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.