Answer:
The minimum distance in which the car will stop is
x=167.38m
Explanation:

∑F=m*a
∑F=u*m*g
The force of friction is the same value but in different direction of the force moving the car so it can stop so



Answer:The energy of the wave by a factor of 4
Explanation:
Longitudinal, because the sound can only travel at one direction
Yes you need the light or just go outside to get it from the sun