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2 years ago

6

A star is moving towards the earth with a speed at 90% the speed of light. It emits light, which moves away from the star at the

speed of light. Relative to us on earth, what is the speed of the light moving toward us from the star?

1 answer:

AnnyKZ [126]2 years ago

5 0

Answer:

The speed of light measured in any frame is c = 3.00E8 m/s.

This is one of Einstein's postulates of special relativity.

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Which clouds are often associated with thunder and lightning?

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3 years ago

Be sure to answer all parts. Assume the diameter of a neutral helium atom is 1.40 × 102 pm. Suppose that we could line up helium

ss7ja [257]

Answer:

The number of atoms are $1.86\times10^{8}$ .

Explanation:

Given that,

Diameter $D = 1.40\times10^{2}\ pm$

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Using formula of numbers of atoms

$Number\ of\ atoms =\dfrac{2.60\times10^{-2}}{1.40\times10^{2}\times10^{-12}}$

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Hence, The number of atoms are $1.86\times10^{8}$ .

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2 years ago

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UkoKoshka [18]

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Explanation:

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2 years ago

State two places where thermal conduction takes place.

Crank

Answer:

two places where thermal conduction takes place are gases and liquids, conduction is due to collisions of molecules during their random motion. Hence, the correct option is (C). Note: Though, the particle distances between gases are much more in comparison to solids and liquids, conduction slowly occurs in gases also

Explanation:

i hope it will help you

7 0

3 years ago