14. How do scientists know that the universe is expanding? The galaxies are moving away from each other, and the temperatures are decreasing. The galaxies are moving away from each other, and the temperatures are increasing. The galaxies are moving toward each other, and the temperatures are increasing. The galaxies are moving toward each other, and the temperatures are decreasing.
Answers
The universe is expanding is as the galaxies are moving away from each other, and the temperature of the universe is decreasing. Therefore, option (1) is correct.
How is the universe expanding?
First scientists theorized that as the universe is expanding and its temperature has gradually decreased. The universe has been expanding since the Big Bang and, as it expands, it’s temperature cooling down.
The temperature of the universe can be measured by looking at the cosmicmicrowave background (CMB). The temperature an be estimated by the thermal radiation left over from the BigBang.
The CMB scientists have been investigating that its temperature has been dropping off gradually as our universe expands out and the current average temperature of the cosmos is estimated about 2.73 Kelvin.
The point of the Big Bang from the Big bang theory is described as densesingularity and infinitely hot. The energy from the Big Bang distributed as the universe expands and gives the cooling effect.
But new research suggests otherwise that the temperature of the earth is actually increasing as it expands. Therefore, the temperature of universe increasing with its expansion.
Learn more about universe expanding, here:
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Related Questions
2.The image below shows two nitrogen atoms. For these two atoms to form a stable molecule, N2, how many electrons would have to be part of covalent bonds?
5) How do you describe a person who likesinventing stories?Plz Help ;_; :v
Which statement defines calorimetry ?
Which types of reactions would result in the formation of precipitate?
Answers
The correct answer is
C. Negative ions are attracted to the anode.
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Water has specific heat. This helps us with homeostasis.
b. NH4S
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The separation of ammonium sulfide has been possible with filter paper.
Thus, option B is correct.
The dissolution or solubility of the compound has been used for the determination of the sample actions.
The compounds that are soluble has been not be visible independently. The undissolved solute in the sample has been clearly visible discreet in the solution, resulting in the separation by physical means.
Separation through filter paper
Filter paper has been the small pore size material that has been used for the physical separation of the compounds in heterozygous solution.
The solution of NaCl and water has been pure solution, and thus the separation of NaCl has not been possible with the filter paper.
The solution of ammonium sulfide and water has been a heterozygous solution, as ammonium sulfide precipitate out in the solution. Thus, the separation of ammonium sulfide has been possible with filter paper.
Thus, option B is correct.
For more information about, filter paper, refer to the link:
The compound when stirred in water will not pass through filter paper is NH4S. The answer is letter B. This is because it is a precipitate that resulted from the reaction of an acid or a base. NaCl will pass through the filter paper because it is soluble in water.
B.the energy of the products
c.the energy of activated complex
d.the energy of activation
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The correct answer is D. The energy needed for a chemical reaction is called the activation energy. This energy is to be present in order for the reaction to happen. This can be achieved by supplying or releasing heat from a system of reactants. This can achieved faster by using a catalyst.
What is the correctly rounded answer of thee following calculation:
23.7 / 4.9 =?
0 4.8
04
5
0 4.84
O 4.83
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mathematical operation, and
report the answer to the
appropriate number of
significant figures.
5.1 – 2.3685 = [?]
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Answer: 2.7 is the real answer if you follow the right rules!
Answer: