3 years ago

A boy is pushing forward on a crate with a force of 100 newtons. the reaction force is

1 answer:

4 0

According to Newtons 3rd law of Motion, for every action, there is an equal and opposite reaction. So if the boy is pushing forward on a crate with a force of 100 newtons, the crate is pushing back on the boy with a force of 100 newtons. Hope this helps

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The half-life of carbon-14 is 5370 years. The carbon-14 levels in a fossil indicate that 6 half-lives have passed. How old is th

vodomira [7]

On half life is 5370 years; 6 half lives have passed. You just multiply,

5370*6 = 32,220 years

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2 years ago

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14) the formula k2s indicates that

Ivan

14.) c) there are two potassium ions for each ion of sulfur. 15.) b) Lithium fluoride. 16.) d) carbon-12 atom. 17.) <span>c) nonmetal fluorine.</span>

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2 years ago

Find the magnitude of the sum of two vectors; A is 5 km , and B is 7 , when the angle btween them is 120

Dimas [21]

Answer: 6.24 km

Explanation:

Given

The magnitude of the first vector(say) $\left | a\right |=5\ km$

the magnitude of the second vector(say) $\left | b\right |=7\ km$

the angle between them is $120^{\circ}$

The resultant vector magnitude is given by

$\left | \vec{R}\right |=\sqrt{a^2+b^2+2ab\cos \theta}$

$\left | \vec{R}\right |=\sqrt{5^2+7^2+2\times 5\times 7\cdot \cos 120^{\circ}}\\\left | \vec{R}\right |=\sqrt{74-35}=\sqrt{39}\\\left | \vec{R}\right |=6.24\ km$

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2 years ago

What are most fossils discovered in

erik [133]

Sedimentary rock I believe

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3 years ago

Calculate the kinetic energy of a 750 kg compact car moving 50 m/s.

k0ka [10]

935,500 joules because when we use the KE formula KE=1/2mv^2;
KE=1/2(750)(50)^2
KE=375(2500)
KE=935,500 Joules
Hope it helps

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3 years ago