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Tanya [424]
3 years ago
12

What does the big bang theory explain?

Physics
1 answer:
kotegsom [21]3 years ago
6 0
The answer is c because the big bang theory is about how the universe was created by infinite energy 
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Two metal spheres are hanging from nylon threads. When you bring the spheres close to each other, they tend to attract. Based on
Tamiku [17]

Explanation:

In the given question, the two metal spheres were hanged with the nylon thread.

When these two spheres were brought close together, they attracted each other. The attraction between these spheres is the result of the opposite charges between them.

The possible ways by which these two metal spheres can be charged are by induction that is touching the metal or by rubbing them.

During induction, the same charges are transferred to each sphere. In this case, either both the spheres will be negatively charged or positively charged.

It is not possible that after the sphere touch each other they will cling together because the same charge repels each other and during touching, if one sphere is neutral, then the charged one will transfer the same charge. And as we know that same charge repel each other therefore they will repel each other.

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3 years ago
Does gravity increase or decrease with greater distance?
PolarNik [594]
Gravitational force decreases with increasing distance. So it decreases!
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3 years ago
Marina walked 2km in half an hour, what was her average speed during her walk?
ad-work [718]

Answer:

4km/hr

Explanation:

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3 years ago
A magnesium oxide component must not fail when a tensile stress of 10.5 MPa is applied. Determine the maximum allowable surface
Aloiza [94]

Answer:

Maximum permitted surface crack length is 1.29 mm

Explanation:

As per the question:

Tensile stress, \sigma = 10.5\ MPa = 10.5\times 10^{6}\ Pa

Surface energy of magnesium oxide, SE = 1.0\ J/m^{2}

Modulus of elasticity of the material, E = 225 GPa = 225\times 10^{9}\ Pa

Now,

To calculate the maximum allowable surface crack length:

L = \frac{2E\times SE}{\sigma^{2}\pi }

L = \frac{2\times 225\times 10^{9}\times 1.0}{10.5\times 10^{6}\times \pi } = 1.29\times 10^{- 3}\ m = 1.29\ mm

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3 years ago
3. A crane can lift a 5000 N object to height of 30 m in 120 seconds. The power at which the crane is
dolphi86 [110]
It’s D. I hope it helps
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3 years ago
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