Answer:
Explanation:
Given
Two masses M and 2 M with velocity v in opposite direction
After collision they stick together
Initial momentum
final momentum
Conserving momentum
i.e. system moves towards the direction of 2M mass
Initial kinetic Energy 
Final Kinetic Energy 
loss of Energy
Nitrogen
oxygen
argon
carbon dioxide
Explanation:
The runner was 8.6km away from the finish line when the bird starts flying.
Therefore it takes the bird 8.6/14.4 = 0.60 hours for the bird to fly to the finish line.
In that 0.60 hours, the runner would have ran an extra 3.6km/h * 0.6h = 2.16km.
Now, the runner and the bird are flying towards each other. The distance between them is 8.6 - 2.16 = 6.44km and their combined speed is 18.0km.
Hence, they will meet in 6.44/18.0 = 0.36 hours.
Overall, the bird flew for 0.60 + 0.36 = 0.96 hours, and flew 14.4km/h * 0.96h = 13.8km.
Plants absorb water and release o2
