<span>For maximum visibility, backing a vehicle requires a driver to:
Adjust the mirrors so that the driver can see the intended trailer path.
</span>when driver is moving backward or backing a vehicle, adjusting of mirror is important factor because a driver can see backward from the mirror.
Always park back in a space.
<span>There are also other factors a driver should keep in mind:
Turn your head also while backing
back slowly and should ready to stop any moment
if someone is walking behind the vehicle, horn the vehicle etc
</span>
Low velocity im pretty sure
0.2 atm.
by boyles law, PV= constant. hence, p1*v1=p2*v2
so, 400*1=p2*2000 (careful with units, 1litre= 1000 ml)
so, you get p2=0.2 atm