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tatyana61 [14]
3 years ago
7

3. How would you date a sample of rock that you suspect as being one of the earliest on Earth? (1 point)

Biology
1 answer:
Kay [80]3 years ago
4 0
<span>If I were attempting to date a rock sample that I suspect to be incredibly old, i would use radioactive isotopes with a long half life. When dating rocks and fossils to discover approximately how old they are, radioisotope dating is used on igneous rocks found near fossils. Things like Uranium 235, which is an unstable radioactive isotope of elements, decays at a constant rate over time so can be useful in determining age.</span>
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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

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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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Explanation:

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