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kotegsom [21]
3 years ago
6

How much of Earth is made of mantle?

Physics
1 answer:
Free_Kalibri [48]3 years ago
5 0
Precisely 84% if the Earth is made of mantle.
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When, how and where are questions asked during critical inquiry?*<br> 1 p<br> True<br> False
Ierofanga [76]

Answer:

true

Explanation:

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When your peers see you doing good work, they may feel motivated themselves. What are some othe
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1. friends getting you to study

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Which statement best describes why electrons are typically not included when determining the mass of an atom?
Ede4ka [16]
<span>The protons and neutrons are much more massive than the electrons.
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The electrons are simply too small to really change the mass, so they aren't counted.
4 0
3 years ago
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A block of mass 5 kg is placed on a rough table having a coefficient of static friction μs = 0.2.What is the force required to m
just olya [345]

Answer:

<em>We need to (at least) apply a force of 9.8 N to move the block</em>

Explanation:

<u>Second Newton's Law</u>

If a net force F_n different from zero is applied to an object of mass m, then it will move at an acceleration a, given by

F_n=ma

If we apply a force F to an object placed on a rough surface, the only way to make it move is to beat the friction force  which is given by

F_r=\mu F_N

Where \mu is the static friction coefficient and F_N is the normal force exerted by the table to the object. Since there is no motion in the vertical direction the normal force equals the weight of the object:

F_N=mg=5\ kg\ 9.8\ m/s^2=49\ N

The friction force is

F_r=0.2 (49)=9.8\ N

Thus, we need to (at least) apply a force of 9.8 N to move the block

5 0
4 years ago
An electrical field has: direction but not magnitude magnitude but not direction neither magnitude nor direction none of the abo
Elanso [62]
An electric field has both magnitude and direction.
I don't think that's one of the first 3 choices.
3 0
3 years ago
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