Question

Name the discovery that enabled the primitive humans to colonise colder parts of the earth.
Mention one more advantage that primitive humans derived from the discovery.(See Lesson 2)

Answer 1

Explanation:

$Mass of bullet</p><p>m=0.05 Kg</p><p>v=1000m/s</p><p>F=200N</p><p>Force on the man is equal to the change in momentum of the bullets coming out of the gun</p><p>F=tmvn</p><p>200=10.5×1000×n</p><p>n=4persecond</p><p>n=240perminute</p><p>$

Answer 2

Answer:

Discovery of fire had a profound influence on their lifestyle. Primitive humans used fire for various purposes. They realise that use of fire also enabled them to colonise the colder parts of the earth and meat becomes tender when cooked in fire, making it more digestible.

Explanation:

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