An engineer in a locomotive sees a car stuck on the track at a railroad crossing in front of the train. When the engineer first sec's the car, the locomotive is 160 m from the crossing and its speed is 29 m/s. If the engineer's reaction time is 0.66 S. what should be the magnitude of the mini mum deceleration to avoid an accident? Answer in units of m/s

If the diameter of a microscope's field is 0.12mm, how wide is an object that fills one-quarter of the field?  (Explain how you've reached your answer.)

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Explanation:

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: