Which happened after the electromagnetic and weak nuclear forces were separated from the unified force?

1 answer:

7 0

-release of first light
-nucleosynthesis
-formation of stars and galaxies
<span>-formation of elementary particles</span>

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When the distance between two charges is halved, the electrical force between them?

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If the distance between two charges is halved, the electrical force between them increases by a factor 4.

In fact, the magnitude of the electric force between two charges is given by:
$F= k \frac{q_1 q_2}{r^2}$
where
k is the Coulomb's constant
q1 and q2 are the two charges
r is the separation between the two charges

We see that the magnitude of the force F is inversely proportional to the square of the distance r. Therefore, if the radius is halved:
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the magnitude of the force changes as follows:
$F'=k \frac{q_1 q_2}{r'^2}=k \frac{q_1 q_2}{( \frac{r}{2})^2 }=k \frac{q_1 q_2}{ \frac{r^2}{4} } =4k \frac{q_1 q_2}{r^2}=4 F$
so, the force increases by a factor 4.

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How does electrical conduction compare between metals, nonmetals, and metalloids

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Answer:

metal> metalloids >nonmetals (Electrical conductivity)

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Electrical conductivity of objects can be compared by the bonding energy of electrons in them.

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Nonmetals have a very high bonding energy of electrons, so at room temperature negligible number of free electrons are present so electrical conductivity is very low.

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