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rusak2 [61]
3 years ago
7

PLZZZ HELP T^T (BRAINLIEST) to whoever can help

Biology
1 answer:
Romashka-Z-Leto [24]3 years ago
3 0

Answer:

For the first one, I think new species are created through "Natural Selection"

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A bird is flying in the air at a 4 m/s. If the mass of the bird is 7kg what is it’s kinetic energy
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Answer: The kinetic energy of the flying bird is 56 Joules.

Explanation:

Mass of the bird  = 7 kg

Velocity of the flying bird = 4 m/s

Kinetic energy of the bird will be given by :

K.E.=\frac{1}{2}mv^2

K.E.=\frac{1}{2}\times 7 kg\times (4 m/s)^2=56 Joules

The kinetic energy of the flying bird is 56 Joules.

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2 years ago
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4 0
3 years ago
Heart muscles contract and relax. What is the most important effect of
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Answer:

A. Blood is pushed through vessels

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