Answer: The domestication of animals and agriculture begin in the first civilization in early humans.
Explanation:
Early humans used to hunt small and big animals using tools to obtain them as food. Also the hunting practice used to be tiring, time consuming, effort oriented and people used to hunt individually and also in groups. So, some plant species were identified which can give a good alternative against hunting and they were planted and cared upon. Also some domestic animals proved to be a good source of food and some of them used to help humans in locating food. The domestication of animals is associated with permanent settlement of humans.
Answer:
B. PEi + KEi = PEf + KEf
Explanation:
It is given that
A leaf falling to the ground before hitting the ground has an initial total energy of PEi + KEi.
And the total final energy of the leaf after it hits the ground is PEf + KEf .
Since there is no air resistance, therefore the total energy is conserved.
According to the conservation of law of conservation of energy, energy is neither created nor it is destroyed. The energy is always conserved. The initial energy will be equal to the final energy.
Thus the total energy of the leaf before hitting the ground and after hitting the ground will be equal.
Thus initial energy is equal to the final energy.
Hence the answer is ---
B. PEi + KEi = PEf + KEf
Answer:
D) Change Blindness
Explanation:
Change Blindness is a psychological phenomenon in which a person skips the change in visual stimulus. When the instructor was busy in giving the lecture, he did not notice that several students have left the room and were not attentive to the lecture. This is an example of change blindness.
