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Sidana [21]
3 years ago
12

Gravity is ____________________ to the distance between and difference in mass between two objects

Physics
2 answers:
Orlov [11]3 years ago
4 0

Explanation:

Force of gravity is the force which attracts objects along with its mass towards the Earth or ground.

Mathematically,       F = \frac{Gm_{1}m_{2}}{r^{2}}

where                F = force of gravity

                         G = gravitational constant

                          m_{1} = mass of object 1

                          m_{2} = mass of object 2

                          r = distance between the given masses

Therefore, more is the mass of object more will be the force of gravity. Whereas more is the distance between objects or masses then less will be the force of gravity.

Hence, we can conclude that gravity is inversely proportional to the distance between masses and directly proportional to the masses of objects.  


olga55 [171]3 years ago
3 0
Gravity is proportional to its mass<span> and </span>distance between<span> it and another </span><span>object</span>
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Oliga [24]

Answer:

Current, I = 1000 A

Explanation:

It is given that,

Length of the copper wire, l = 7300 m

Resistance of copper line, R = 10 ohms

Magnetic field, B = 0.1 T

\mu_o=4\pi \times 10^{-7}\ T-m/A

Resistivity, \rho=1.72\times 10^{-8}\ \Omega-m

We need to find the current flowing the copper wire. Firstly, we need to find the radius of he power line using physical dimensions as :

R=\rho \dfrac{l}{A}

R=\rho \dfrac{l}{\pi r^2}

r=\sqrt{\dfrac{\rho l}{R\pi}}

r=\sqrt{\dfrac{1.72\times 10^{-8}\times 7300}{10\pi}}

r = 0.00199 m

or

r=1.99\times 10^{-3}\ m=2\times 10^{-3}\ m

The magnetic field on a current carrying wire is given by :

B=\dfrac{\mu_o I}{2\pi r}

I=\dfrac{2\pi rB}{\mu_o}

I=\dfrac{2\pi \times 0.1\times 2\times 10^{-3}}{4\pi \times 10^{-7}}

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So, the current of 1000 A is flowing through the copper wire. Hence, this is the required solution.

4 0
3 years ago
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