In a lecture demonstration, a 3.0-m-long vertical string with ten bolts tied to it at equal intervals is dropped from the ceiling of the lecture hall. the string falls on a tin plate, and the class hears the clink of each bolt as it hits the plate. the sounds will not occur at equal time intervals. how could the bolts be tied so that the clinks occur at equal intervals?

they must be arranged in such a way that the distance between two adjacent bolts must be increased in ratio of 1 : 4 : 9 :....

Explanation:

as we know that the time taken by an object to hit the ground from rest position is given as

so here we can say that time to hit the floor directly proportional to the square root of its height from the surface

now we wish to arrange all the bolts in such a way that they all will hit in regular interval of time

so we will have to arrange them such that

so we have

so they must be arranged in such a way that the distance between two adjacent bolts must be increased in ratio of 1 : 4 : 9 :....

colorectal cancer may also develop from areas of abnormal cells in the lining of the colon or rectum. this area of abnormal cells is called dysplasia and is more commonly seen in people with certain inflammatory diseases of the bowel such as crohn's disease or ulcerative colitis.

cant without the picture! ?