Because of convection, the warmest air in a room
a. spreads out in all directions.
b. rises toward the ceiling.
c. transfers heat to the walls.
d. sinks toward the floor.

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:

the higher the current the higher the mag field around it the higher the influence on the compass