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sergejj [24]
3 years ago
9

The potential (relative to infinity) at the midpoint of a square is 3.0 V when a point charge of +Q is located at one of the cor

ners of the square. What is the potential (relative to infinity) at the center when each of the other corners also contains a point charge of +Q?
a) 0 V
b) 3.0 V
c) 9.0 V
d) 12 V
Physics
1 answer:
Sveta_85 [38]3 years ago
4 0

Answer:

d) 12 V

Explanation:

Due to the symmetry of the problem, the potential (relative to infinity) at the midpoint of the square, is the same for all charges, provided they be of the same magnitude and sign, and be located at one of the corners of the square.

We can apply the superposition principle (as the potential is linear with the charge) and calculating the total potential due to the 4 charges, just adding the potential due to any of  them:

V = V(Q₁) + V(Q₂) +V(Q₃) + V(Q₄) = 4* 3.0 V = 12. 0 V

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Some planetary scientists have suggested that the planet Mars has an electric field somewhat similar to that of the earth, produ
aalyn [17]

Answer:

324795 C

252.637820565 N/C

2.235844712\times 10^{-9}\ C/m^2

Explanation:

\epsilon_0 = Permittivity of free space = 8.85\times 10^{-12}\ F/m

R = Radius of Mars = 3.4\times 10^6\ m

A = Area = 4\pi R^2

\phi = Electric flux = 3.67\times 10^{16}\ Nm^2/C

Electric flux is given by

\phi=\dfrac{q}{\epsilon_0}\\\Rightarrow q=\phi\epsilon_0\\\Rightarrow q=3.67\times 10^{16}\times 8.85\times 10^{-12}\\\Rightarrow q=324795\ C

The charge is 324795 C

Electric field is given by

E=\dfrac{\phi}{A}\\\Rightarrow E=\dfrac{3.67\times 10^{16}}{4\pi (3.4\times 10^6)^2}\\\Rightarrow E=252.637820565\ N/C

The electric field is 252.637820565 N/C

Surface charge density is given by

\sigma=\dfrac{q}{4\pi R^2}\\\Rightarrow \sigma=\dfrac{324795}{4\pi (3.4\times 10^6)^2}\\\Rightarrow \sigma=2.235844712\times 10^{-9}\ C/m^2

The surface charge density is 2.235844712\times 10^{-9}\ C/m^2

6 0
3 years ago
Molecules , like hormones , are made up of which of the following
hjlf

Answer:

atoms

Explanation:

Hormones are derived from amino acids or lipids. Amine hormones originate from the amino acids tryptophan or tyrosine. Larger amino acid hormones include peptides and protein hormones. Steroid hormones are derived from cholesterol.

6 0
3 years ago
Read 2 more answers
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deff fn [24]
KE = ½m*v² = ½*1.0*[0.866*3E8]² = 3.375E16 J 

<span>Etot = mc²/√[1 - (v/c)²] = 1.8E17 J</span>
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There's nothing on the list you provided that's related to Coulomb's Law.
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UkoKoshka [18]

Answer:

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Explanation:

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