You're convinced the opera is almost over because of the large women singing a loud vibrato. if the sound intensity level (db) increases from one note to the next by 1 db, what is the percent increase in the intensity? the singer comes over to your side of the stage, only 10 m away, and your phone applet tells you the sound intensity level is 85 db. what is the power coming from her voice? all of the sudden 4 more identically loud women come out of nowhere and join her - you think to yourself, will it ever end. three of them are standing next to her and the fourth is on the other side of the stage, twice as far from you as the group of singers. what is the sound intensity level now?

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

I'm not sure what your asking buddy.. but i know that you can weld two peices of steel by pure force and pressure.