Pada jarak 3 meter dari sumber ledakan terdengar bunyi dengan taraf intesitas 50 db tentukan taraf intesitasnya pada jarak 50 meter dari sumber ledakan tersebut

Penghitungan intensitas suara dengan satuan desibel menggunakan rumus "10 log x" yang berarti setiap 10 desibel akan menghasilnya bunyi dengan intensitas 10x lipat, 20 desibel = 100 kali lipat, dan seterusnya. Rumus yang dipakai untuk soal ini adalah:

TI2 = TI1 − 10 log ( r2/r1 )2
Intensitas suara 2= intensitas suara 1 + 10 log (lokasi 2/lokasi 1)
Intensitas suara 2= 50dB + 10 log 50m/3m = 50db + 10 log 16.7= 62.21dB 

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.

The best description is: . nobody has any idea what q is.