Answer:
A pair of light or sound waves will experience interference when they pass through each other. Destructive interference occurs when the maximal of 2 waves are 180 degrees out of phrase: A positive displacement of one wave is canceled exactly by a negative displacement of the other wave.
mass and acceleration have a nice day
Answer:
E. The momentum of the car-truck system is conserved, but the momentum of each one separately is not conserved.
Explanation:
We know average speed =total distance/time taken
So avg speed=(85+63)/(5+5)=14.8km/hr