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 :....

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

the answer would most likely be c, because if it's a comical piece of information, it may likely not be true, if it's a site that allows anybody to edit the content, it could mean a five year old is typing the info, and if it's a tv show produced by a celeb, it may have a biased opinion.