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Elan Coil [88]
3 years ago
6

Before there was life on earth, which gas was absent from the ancient atmosphere?

Biology
1 answer:
Damm [24]3 years ago
4 0
D oxygen there was no free oxygen on the earth
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How much work is done on a 100-N boulder when you lift it 2m straight up?
zzz [600]

200J

Explanation:

Given parameters:

Force on boulder = 100N

Distance moved = 2m

Unknown:

Work done = ?

Solution:

Work done on a body is the force applied to move such body in the direction of the force.

           Work done = force x distance

Input the parameters in the equation:

       Work done = 100 x 2 = 200Nm or 200J

The work done in lifting the boulder is 200J

Learn more:

Work done brainly.com/question/9100769

#learnwithBrainly

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Mrs. allen is pregnant. her baby's legs and arms have started to grow, and its intestinal system is beginning to develop. the ba
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The stage is called embryonic
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NeTakaya

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Mocous cell

Explanation:

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natali 33 [55]

Answer:

A cat

Explanation:

Because if I were a pet cat at least someone would take care of me and I would not have to do any real things like responsibilities.

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What type of bond is formed when two atoms share a pair of electrons?
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