I think the answer would be A. Density because many headlights could have the same density, but the rest of the analysis techniques would be specific to that crime.
The acceleration depends on the mass of an object
Eye strain and self confidence issues.
Answer:
16km/h
Explanation:
Vt=20km/h ---train speed
Vd=4km/h
Donas speed relative to ground is:
Vrd=Vt-Vd
Donas is moving in opposite direction of train .
Vrd=20km/h-4km/h
Vrd=16km/h
