The method to increase friction is by i)polishing
ii)increasing roughness
iii)streamlining
iv)lubricanation

if u say right ans i will send. more point. if it wrong i will report

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:

temp rises, and expansion

0.11 m/s and 0.28 m/s should be correct

that would be because of both gravity and friction. so     c