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3 years ago

What does a red shift indicate about a galaxy?

2 answers:

6 0

The only cause we know of that could shift the spectrum of a source toward longer wavelengths isthe source moving away from us. That's how we interpret the red shift when we see it, and that's where the whole idea of the expanding universe comes from. But ... just like gravity and the Earth going around the sun ... it can't be proved, so it's "only a theory".

shtirl [24]3 years ago

4 0

<em>When a red shift happens that means a galaxy is moving away from us.</em>
<em>Therefore the answer is D.
</em>Hoped I helped:D

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A scientist mixes a solid powder into a beaker

faust18 [17]

The question doesn’t make sense sorry

5 0

3 years ago

What can be said about a small Ksp value?

fredd [130]

Answer:

The correct answer is option B.

Explanation:

Solubility product is defined as the product of concentration of ions present in a solution each raised to the power its stoichiometric ratio.

The equation for the ionization of the magnesium hydroxide is given as:

$A_xB_y\leftrightharpoons xA^{y+}+yB^{x-}$

xS yS

Here, S = concentration of compound dissolved in solvent via dissociation

Expression for the solubility product of $A_xB_y$ will be:

$K_{sp}=[A^{y+}]^x[B^{x-}]^y\\\\K_{sp}=(xS)^x\times (yS)^y$

As we can see,

$K_{sp}\propto [S]$

Higher the value of [S] more will be solubility of compound in a solvent.Hence, more soluble it will be.
Lower the value of [S] less will be solubility of compound in a solvent.Hence, less soluble it will be.

Hence, the correct answer is option B.

7 0

3 years ago

What type of land use can result in nutrient depletion

Yuki888 [10]

The land should be given time to heal and we should let nature take its course. If people use lands way to much, the land will get damaged and won’t be available for the use in the future.

5 0

3 years ago

A reaction that is considered fast is likely to have which of the following characteristics?

Alexxx [7]

Answer:

I believe it's either a or b but I'm pretty sure that it's a

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3 years ago

Which of the following state of matter has the modt space between the particles

lesya [120]

Answers

(A)Flammability

8 0

3 years ago