From the questions the welfare people asked, try to discern their hypotheses. List the hypotheses put forward as to how the children had DNA that did not match with Lillian's DNA.

Your answer will be b action plan.

It depends on the surface of the levels. the rougher the surface, the greater is the frictional force. for rougher surfaces, you would need to exert greater force to move the object. the concept is that, you must overcome the frictional force in order to bring the object into motion. this is the reason why we add lubricants to the joints so they could easily move. this answer was on