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Triss [41]
3 years ago
14

What is Precambrian time?

Physics
1 answer:
Ilia_Sergeevich [38]3 years ago
3 0

Answer:

The Precambrian Era comprises all of geologic time prior to 600 million years ago. The Precambrian was originally defined as the era that predated the emergence of life in the Cambrian Period.

Explanation:

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3 years ago
A boy of mass 45kg sits 109cm to the left of seesaw. Another boy of mass 29000g wants to balance the seesaw. At what distance he
miss Akunina [59]

Answer:

d_{2} = 169 cm

Explanation:

Mass 1 = 45 kg   => Force = 450 N

Mass 2 = 29 kg   => Force = 290 N

<u><em>According to principle of moments:</em></u>

=> F_{1}d_{1} = F_{2}d_{2}

Where F_{1} = 450 N, d_{1} = 109 cm and F_{2} = 290 N

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Dividing both sides by 290

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3 years ago
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