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vivado [14]
3 years ago
9

What is the fundamental source of all energy in the universe ?

Physics
1 answer:
Ulleksa [173]3 years ago
3 0
The energy from the sun is what sustains the solar system. But this is only a small part of the universe. So it will be inaccurate to say that the source of all energy in the universe is the sun. 
<span>The universe is made up of several other galaxies including our own milky way. But looking at these components of the universe, they are made up of stars. Considering that all other stars are similar to our sun, which by the way is also a star, then we can put it that their collective energies is what constitutes the energy source for the universe. </span>
<span>But here we have only considered what we know about the universe, since man has been able to explore only a minute fraction of the universe, it wont be fair to argue that this is absolute. There may be other energy sources out there that have not yet been discovered, but for now, the idea behind the summation of celestial energies should suffice. </span>
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A rod of 2.0-m length and a square (2.0 mm x 2.0 mm) cross section is made of a material with a resistivity of 6.0 x 10^-8 0.Ω.m
Ksju [112]

Answer:

Heat generated in the rod is 8.33 watts.

Explanation:

It is given that,

Length of rod, l = 2 m

Area of cross section, A=2\ mm\times 2\ mm=4\ mm^2=4\times 10^{-6}\ m^2

Resistivity of rod, \rho=6\times 10^{-8}\ \Omega-m

Potential difference, V = 0.5 V

The value of resistance is given by :

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

R=6\times 10^{-8}\ \Omega-m\times \dfrac{2\ m}{4\times 10^{-6}\ m^2}

R = 0.03 ohms

Let H is the rate at which heat is generated in the rod . It is given by :

\dfrac{H}{t}=I^2R

Since, I=\dfrac{V}{R}

\dfrac{H}{t}=\dfrac{V^2}{R}

\dfrac{H}{t}=\dfrac{(0.5)^2}{0.03}

\dfrac{H}{t}=8.33\ watts

So, the at which heat is generated in the rod is 8.33 watts. Hence, this is the required solution.

8 0
4 years ago
Halla el mínimo común múltiplo de 8​
Elis [28]

Answer:

türk 1 kişi bile yokmu?

Explanation:

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5 0
3 years ago
Do you support trucks are identical each box loaded on the truck has the same mask choose the truck that has the greatest force
Anestetic [448]

gravitational force of earth is given by

F = mg

so here the force will depend on the product of mass and gravity

so here force will be more if we took the condition of more masses

so here in 3rd figure

there will be maximum force of gravity on it

because it will have 6 boxes so there will be maximum mass

So figure of truck with 6 boxes on it is correct answer

7 0
4 years ago
What process produces radiant energy in stars?
noname [10]
"Nuclear Fusion" <span>produces radiant energy in stars

Hope this helps!</span>
7 0
3 years ago
Newton’s second law of motion says when a is applied to a it causes it to.
n200080 [17]

Answer:

When force is applied to an object it causes to to accelerate.

Explanation:

7 0
3 years ago
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