2 years ago

What causes satellites to remain in orbit above Earth?

Physics

1 answer:

nignag [31]2 years ago

3 0

Answer:

A.Satellites achieve a balance between gravity and their velocity that keeps them in orbit.

Explanation:

This balance is called momentum gravity balance

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12)A black body is heated from 27°C to 127° C. The ratio of their energies of radiations emitted will be

Nat2105 [25]

Answer:

$81:256$ .

Explanation:

Let $T$ denote the absolute temperature of this object.

Calculate the value of $T$ before and after heating:

$T(\text{before}) = 27 + 273 = 300\; \rm K$ .

$T(\text{after}) = 127 + 273 = 400\; \rm K$ .

By the Stefan-Boltzmann Law, the energy that this object emits (over all frequencies) would be proportional to $T^4$ .

Ratio between the absolute temperature of this object before and after heating:

$\displaystyle \frac{T(\text{before})}{T(\text{after})} = \frac{3}{4}$ .

Therefore, by the Stefan-Boltzmann Law, the ratio between the energy that this object emits before and after heating would be:

$\displaystyle \left(\frac{T(\text{before})}{T(\text{after})}\right)^{4} = \left(\frac{3}{4}\right)^{4} = \frac{81}{256}$ .

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3 years ago

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alekssr [168]

Answer:

the answer to the first one is B and the second one is c I hope I got them right

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3 years ago

A prototype shows if a product meets the required needs. True False

spayn [35]

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12. Which statement is true when looking at a black ball?

faltersainse [42]

Answer:

All color wavelengths are being absorbed

Explanation:

There is no color reflected when the color is black

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3 years ago

Is chalk a colloid, suspension, element, compound, or a mixture

Fittoniya [83]

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