The electrostatic force between the two ions is
Explanation:
The electrostatic force between two charged particle is given by Coulomb's law:
where
is the Coulomb's constant
are the two charges
r is the separation between the two charges
In this problem, the ion of sodium has a charge of
while the ion of chlorine has a charge of
And the distance between the two ions is
Substituting, we find the electrostatic force between the two ions:
where the negative sign simply means that the force is attractive, since the two ions have opposite charge.
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Answer:
Wavelength,
Explanation:
In an electromagnetic wave both electric and magnetic field propagate simultaneously. Radio waves, microwaves, gamma rays etc are some of the examples of electromagnetic waves.
If f is the frequency of electromagnetic wave, c is the speed of light, then the relationship between the frequency f, wavelength and the speed is given by :
Hence, the correct option that shows the wavelength of electromagnetic wave in free space is(a) " c/f ".
A mixture is a combination of two or more elements that can be separated using physical means such as filtration, evaporation,...etc
A mixture can be one of two types:
1- homogeneous mixture where you cannot identify the elements easily by the naked eye. Example is sugar and water mixture.
2- heterogeneous mixture where you can easily identify the elements through naled eye.
Example is mixture of rocks and sand.
Based on the above, you can easily infer that:
a heterogeneous mixture is a mixture in which the components retain their identity.
<span>Electric field is proportional to q/d^2, where q is the magnitude of the charge and d is the distance. Since all the given units are identical, we can just compare their relative magnitudes without calculating for the exact values.
A) 3/(0.4)^2 = 18.75
B) 1.5/(0.2)^2 = 37.5
C) 6/(0.4)^2 = 37.5
D) 3/(0.2)^2 = 75
Therefore, choice D has the largest electric field of all.
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