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3 years ago

The Doppler. Effect indicates that the universe is expanding because

Chemistry

2 answers:

Juliette [100K]3 years ago

8 0

The correct answer is option C, that is, light from other galaxies is red. Shifted.

It has been witnessed by the astronomers that the light from the distant object in the cosmo is shifted towards the red color frequency that suggests that those objects are moving away or receding from the planet Earth. This process is called Redshift. A similar thing is witnessed for galaxies that are present at very distant places from the planet Earth.

GalinKa [24]3 years ago

7 0

Answer : The correct answer is option C.

Explanation:

Astronomers have observed that light from the distant object in the universe is shifted towards the frequency of red color which indicates that those object are receding or moving away from the planet earth.This phenomena was termed as Red shift .Same thing goes for galaxies which are very far away from the planet earth.

Where as if galaxies were moving towards the the planet earth their light would have shifted toward the frequency of blue color termed as blue shift.

Hence, the correct answer is option C.

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6. For which movement of earth materials is gravity not the main force?

sineoko [7]

B moisture evaporating from an ocean

6 0

3 years ago

Read 2 more answers

Use the link Standard Reduction Potentials. Write net equations for the spontaneous redox reactions that occur during the follow

GalinKa [24]

Answer:

a) Fe(s) + Ni^2+(aq) ----> Fe^2+(aq) + Ni(s)

b) no reaction

c) no reaction

d) 2Mg(s) + 2H2O(l)-----> 2Mg^2+(aq) + O2(g) +4H^+(aq)

e) no reaction

Explanation:

It is important to say here that the ability of a particular chemical specie to displace another chemical specie is dependent on the relative standard reduction potentials of the species involved.

All the reactions stated above are redox reactions. Let us take reaction E as an example. Mg^2+ has a reduction potential of -2.37 V while Cr^3+ has a reduction potential of -0.74V. Since the reduction potential of magnesium is more negative than that of chromium, there is no reaction when a piece of chromium metal is dipped into a solution of Mg^2+.

Similarly, though metals displace hydrogen gas from dilute acids, metals that are less than hydrogen in the reactivity series cannot do that. This explains why there is no reaction when copper and silver are dipped into dilute acid solutions.

Reaction occurs when iron is dipped into a nickel solution because the reduction potential of Fe^2+ is far more negative than that of Ni^2+.

7 0

3 years ago

He resonance structures of carbon monoxide are shown below. show how each structure can be converted into the other using the cu

Ugo [173]

The two resonating structures of Carbon Monoxide are shown below.
The movement of electrons are shown by arrow.

Structure A:
In structure a A the formal charges of Carbon and Oxygen are zero. As Formal Charge is calculated as,

= # of valence electron - electrons in lone pairs + 1/2 bonding electrons electrons

For C:
= 4 - 2 + 4/2
= 4- 4
= 0

For O:
= 6 - 4 + 4/2
= 6- 6
= 0

Structure B:

Formal Charge on C:

= 4 - 2 + 6/2
= 4- 5
= -1

Formal Charge on O:

= 6 - 2 + 6/2
= 6 - 5
= +1

4 0

3 years ago

Is the kool-aid man the jar or the liquid?

nataly862011 [7]

Answer:

I think both

Explanation:

8 0

4 years ago

What is one way to make a positive impact on air quality to reduce air pollution

geniusboy [140]

Answer:

using public transportation

Explanation:

With the use of public transport, there will be a reduction in the number of cars on the streets, this reduction will cause a reduction in the gases released by cars into the atmosphere, which will result in a reduction in air pollution.

5 0

3 years ago