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Olegator [25]
3 years ago
13

The strength of a magnetic field follows _____.

Chemistry
2 answers:
Solnce55 [7]3 years ago
8 0

Answer: The correct answer is "law of poles".

Explanation:

Magnetic field lines are the area around the magnet in which the magnetic force can be experienced.

Law of poles: Like poles of the magnets repel each other with the magnetic force of repulsion. Unlike poles of the magnets attract each other with the magnetic force of attraction.

The direction of the magnetic field lines is from north pole to south pole. The strength of the magnetic field varies with the distance from the poles.

The strength of the magnetic field is stronger at the poles. It decreases from the poles.

The strength of the magnetic field does not follow an inverse square law. The gravity field and the electric field follow an inverse square law. The force from the magnet decreases faster than an inverse square law because all magnets have two opposite poles.

The strength of a magnetic field follows law of poles.

Therefore, the correct option is (D).

nordsb [41]3 years ago
5 0

d is correct answer

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What is the length of a one-dimensional box for an electron (9.109 x 10-31 kg) with an n=1 energy of 479 kJ/mol? Give the answer
OverLord2011 [107]

Answer : The length of a one-dimensional box for an electron is 2.819\times 10^{31}\AA

Explanation :

The energy level of quantum particle in a one-dimensional box is given as:

E_n=\frac{n^2h^2}{8mL^2}

where,

E_n = 479 kJ/mol = 479000 J/mol

n = energy level = 1

h = Planck's constant = 6.626\times 10^{-34}Js

m = mass of electron = 9.109\times 10^{-31}kg

L = length of a one-dimensional box = ?

Now put all the given values in the above formula, we get:

479000J/mol=\frac{(1)^2\times (6.626\times 10^{-34}Js)^2}{8\times (9.109\times 10^{-31}kg)\times L^2}

L=2.819\times 10^{21}m

conversion used : 1m=10^{10}\AA

L=2.819\times 10^{31}\AA

Therefore, the length of a one-dimensional box for an electron is 2.819\times 10^{31}\AA

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3 years ago
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