A.) Average acceleration = change in velocity/time = final velocity - initial velocity/time = 10-0/4 = 10/4 = 2.5m/s^2.
If you remove thermal heat from the reaction the reaction will slow down. meaning that there will be fewer collisions occurring between the particles.
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Well, this is obviously an opinion question, so share your opinion. If you are happy that the Agricultural Revolution(s) paved way for the earth to sustain billions of people, then that's great. But, if you wish there were fewer people on the planet, then share that. Of course, both sides have their pros and cons. Just share your opinion. Good luck!
The trajectory of their motion knocked the Earth into a different orbit.
