What happens when a positively charged rod is brought near a neutral plastic ball? electrons in the ball are repelled to the far side of the plastic ball
the protons on the ball repelled by the positive rod and move to the far side of the ball
electrons in the ball are attracted to the near side of the ball
protons on the ball are attracted to the positive rod and move to the near side of the ball

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:

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acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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measuring things 1 litre of water