Atrain travels 55 km, south along a straight track in 34 minutes.
what is the train's average velocity in kilometers per hour?

96.5 km/h south

Explanation:

The average velocity is given by:

where

d is the displacement

t is the time

We have:

d = 55 km

Therefore, the average velocity is

And the direction is the same as the  displacement (south)

no. bullets are macro objects. wave nature is for light waves, extremely tiny particles. if a light particle was the size of your finger, the bullet would be the size of the universe. so basically, that huge difference in size makes the wave nature of matter insignificant.

a. carbon monoxide from car exhaust

b.particulate matter, such as soot

c.water vapor from a factory smokestack

d.acid rain

these are the answer choices im on that question right now