Two identical spools are held the same height above the floor. a thread is wrapped many times around spool a. the same thread passes over a pulley, and is attached to a fixed point on spool b, so that spool b will not rotate. an x is marked on the floor directly below each spool. both spools are released from rest at the same instant. (assume that the pulley and thread are massless and that the axle of the pulley is frictionless.)

you would expect a sound wave to speed up. - b)

the cellphone, they would then know if the killer would have contacted them or always hated them. or if it was a breakup. but if that is not the case, then it would be the clothing. to put in a bullet, it would have to be put in by hands. hands have finger prints which, would have giving you the answer of who done it.

explanation:

i believe the answer is electric potential.

explanation: