There are two bright stars in a constellation. One of the stars appears red and the other star appears blue. Which of the following is the best explanation for the difference in the stars' color?


The blue star must be moving toward Earth and the red star away from Earth.


The red star must be moving toward Earth and the blue star away from Earth.


The red star must have a greater surface temperature compared to the blue star.


The blue star must have a greater surface temperature compared to the red star.

Answers

Answer 1

Given what we know, we can confirm that the explanation for the situation described is that the blue star must be moving toward Earth and the red star away from Earth.

How do we explain this?

This has to do with a phenomenon known as the doppler effect. This effect explains how we can perceive a star as red or blue depending on its distance and on whether or not it's moving towards or away from us. When an object moves away from us, the wavelengths of the light it emits are stretched, making the object appear red. However, when it moves towards us, this increases the wave frequency that reaches us and we observe it as blue.

Therefore, we can confirm that the explanation for the situation described is that the blue star must be moving toward Earth and the red star away from Earth.

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Related Questions

hello help please i’ll mark brainliest!!! please help

Answers

Answer:

Answer: The hottest time of the day is around 3 p.m. Heat continues building up after noon, when the sun is highest in the sky, as long as more heat is arriving at the earth than leaving. By 3 p.m. or so, the sun is low enough in the sky for outgoing heat to be greater than incoming.

Explanation:

Answer:

The third one

Explanation:

According to Chargoff rule, if a sample of DNA is 32% Adenine, what is the percentage of Guanine?​

Answers

Answer:

18%

Explanation:

Chargaff's rule states that A = T and C = G

The equation for this must be A + C = T + G

A and T should both be .32 since they're equal

--> .32 + C = .32 + G

Both sides must equal each other by .50

.50 - .32 = .18

.18 × 100 = 18% Guanine and also 18% Cytosine

Some species of animals have moved into caves over generations. Which of the
following structures would MOST LIKELY to have become a vestigial structure in
these animals?
eyes
ears
teeth
legs

Answers

the correct answer is eyes


I think the correct answer would also be eyes

Were you able to identify a cell undergoing cytokinesis in an onion cell? Explain.

Answers

Answer:

Mitosis and meiosis are different types of cell division, and although they are first ... One could be forgiven for the assumption that the classic 'onion root tip squash' ... magnification using the eyepiece and objective lens, you will need to be able to ... about how the cells were being used, and had been given no explanation, ...

Explanation:

The cells of the ONION ROOT TIP undergo cytokinesis. This process is evidenced under the microscope by the formation of the CELL PLATE between two daughter cells.

Mitosis is a type of somatic cell division that has four main steps (prophase, metaphase, telophase and anaphase) followed by cytokinesis.

Moreover, cytokinesis is the division of the cytoplasm to form two daughter cells.

The cell plate is a transient compartment that grows between daughter cells. Once cytokinesis is completed, the cell plate gives rise to the cell wall.

In conclusion, the cells of the ONION ROOT TIP undergo cytokinesis. This process is evidenced under the microscope by the formation of the CELL PLATE between two daughter cells.

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HELP PLEASE!!!!!! :)

Answers

Answer:

A . 10 is the population density in pond a B .20 is the population density in pond b C . pond b is the larger Population density

PLEASE HELP FAST!!


Why is this considered a theory instead of a hypothesis
or a law?
se
O It is a statement of fact about how nature works
instead of an explanation.
o It provides an explanation for many observations and
accepted hypotheses.
o It describes how to test a possible explanation of one
specific relationship.
It has not changed over time even though new
technology has been developed.

Answers

Answer:

C

Explanation:

The Green River Formation is famous because it
is the largest fossil deposit in the world
contains the oldest known bat fossil
has the most recently discovghed fossil deposit
is the best known location for carbonized fossils
NEXT OUESTION
© ASK FOR HELP

Answers

Answer:

is the largest fossil deposit in the world

contains the oldest known bat fossil

Transcribe the following DNA sequence (use a different color for the mRNA strand, and remember that RNA has uracil instead of thymine):
DNA: G A T C G A T A C C A T T C G G C G C A T A C T T C G

Answers

Answer:

C U A G C U A U G G U A A G C C G C G U A U G A A G C

Explanation:

this is the complementary strand in mRNA.

A=U

G=C

C=G

T=A

this is the answer key to any mRNA strand.

Hope this helps! :)

The DNA has adenine (A), cytosine (C), guanine (G), and thymine (T) bases whereas RNA is composed of adenine (A), cytosine (C), guanine (G), and Uracil(U).

What is transcription?

It is the process by which RNA is formed from a DNA molecule.

What is the pairing?

A pairs with U, C pairs with G, G pairs with C, and T pairs with A. The first base of each pair belongs to the template strand of the DNA while the other is RNA.

What will be the sequence of RNA?

DNA: G A T C G A T A C C A T T C G G C G C A T A C T T C G

RNA: C U A G C U A U G G U A A G C C G C G U A U G A A G C

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what type of cells carry out cellular respiration

Answers

all living cells must carry out cellular respiration

What is the name of a specific type of model that shows how animals diverge during evolution?(1 point)

taxonomy

hierarchy

diagram

cladogram

Answers

Answer:

Cladogram.

Explanation:

A cladogram is a diagram used in cladistics to show relations among organisms. A cladogram uses lines that branch off in different directions ending at a clade, a group of organisms with a last common ancestor. In biology, taxonomy is the scientific study of naming, defining and classifying groups of biological organisms based on shared characteristics. Taxonomy would not be based on genetic diversion during evolution, it only describes similar characteristics amongst animals.

I also chose taxonomy on the test and it was wrong. The right answer said cladogram.

A specific type of model that shows how animals diverge during evolution is Cladogram. So, the correct option is D.

What do you mean by Evolution?

Evolution is defined as the process of growth and development or the theory that organisms have grown and developed from past organisms.

A cladogram is a diagram that shows the evolutionary relationships of several clades. A clade is a group of organisms, which contains both an ancestral species and its descendants. The common ancestor appears at the root of the cladogram.

Therefore, A specific type of model that shows how animals diverge during evolution is Cladogram.

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amoeba is uni cellular true or false giving brainliest​

Answers

Answer:

Amoeba is a unicellular organism

Answer:

Amoeba is Unicellular organism

because it consists of single cell. A Unicellular organism is a organism that consists of a single cell. This means all life processes such as reproduction , feeding, digestion and excretion occur in one cell...

Explanation:

So, ANS is True

Hope it helps you

What reacts with sulfur dioxide in
the atmosphere to form acids that
return to the surface as either dry
or wet deposition?

Answers

Answer:

Acid rain is caused by emissions of sulphur dioxide and nitrogen oxide, which react with the water molecules in the atmosphere to produce acids.

Translation or protien synthesis is a

a) One step process
b) Multi-step process
c) reversible process

Answers

Answer:

Multi-step process

Because it can be done twice or more

Start off with 2,500 plants of which 50% have medium-tip leaves, 25% have wide-tip leaves, and 25% have drip-tip leaves,
Each circle in your simulation will represent 125 organisms. Calculate how many circles you need for each trait, and then
create your simulation. Be sure to include a key that states the color coding for each trait.

Answers

Answer:

I don´t know if this is right, but this is what I got.  

Explanation:

Electrons were discovered because of the their
a. charge
b. movement
c. mass
d. shapre

Answers

Charge ? I’m not sure

The founder of modern evolutionary theory is considered to be--

Answers

Answer: Charles Darwin

Explanation:

B. What is the distance between the two troughs?

Answers

The distance between two troughs (or two crests) is the wavelength.

hii pls help i’ll give brainliest if you give a correct answer

Answers

I’m pretty sure it’s A north to south I’m sorry if I’m wrong

Answer:

East to West

Explanation:

what is muscle cramp how can we get relief from​

Answers

A muscle cramp is from being hydrated and you get relief from it by drinking water.. can I have the brainlyist please :))

Answer:

A muscle cramp can be caused by dehydration within one's body. Some ways to relieve this is to stretch and massage. Stretch the cramped muscle and gently rub it to help it relax. Following these actions try to hydrate yourself as much as possible

Explanation:

Are there any parts of the human body that get oxygen directly from the air and not from the blood?

Answers

other then the lungs no all of the body parts get oxygen from blood cells

Mom has type O blood. Dad has type AB blood. What percentage of their kids will inherit type B blood?

Answers

They will get at least 30%

Answer:

50%

Explanation:

Type A blood and type B blood are both dominant over type O blood.

       A    B

O   AO  BO

O   AO  BO

As is demonstrated by the Punnett square, the children's genotypes will either be AO or BO. Since type O blood is recessive, no child will have O blood, as other dominant alleles are present. 50% will have type A blood and 50% will have type B blood.

T or F _ Cytosine, guanine, thymine and adenine are referred to as phosphates.

T or F DNA is in the shape of a helix.

A nucleotide is made up of a suqar, phosphate and two nitrogen bases.

Replication is performed prior to cell division.

Adenine always pairs with quanine.

Complementary base pairing matches up complementary sugars.

T or F _The sides of the DNA molecule are made up of repeating nitroqen bases and suqars.

The letters that make up the DNA molecule code for qenes.

T or F _ Replication results in two strands of DNA, each of which has half of the oriqinal strand.

T or F Covalent bonds hold nitrogen bases together, forming the rings of the DNA ladder.

Answers

Answer:

f t f t t t f ? t f

Explanation:

Cytosine, guanine, thymine and adenine are NOT referred to as phosphates (they are nitrogen bases), whereas DNA is in the shape of a double helix'.

A nucleotide is made up of sugar, phosphate and a nitrogen base.

The replication is performed after cell division.

Adenine always pairs with thymine, whereas cytosine pairs with guanine.

Complementary base pairing matches up nitrogen bases.

The letters that make up the DNA molecule code for genes.

Replication results in two strands of DNA, each of which has half of the original strand.

Hydrogen bonds hold nitrogen bases together, forming the rings of the DNA ladder.

In conclusion, Cytosine, guanine, thymine and adenine are NOT referred to as phosphates (they are nitrogen bases), whereas DNA is in the shape of a double helix.

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Build the hierarchy of Federal Courts below:

Answers

Answer:

Supreme Court (top)

Courts of Appeal (middle)

District Courts (bottom)

Explanation:

Help! Easy question
Which of these are not true?
a. Combustion is faster process than Respiration.
b. Combustion occurs at a higher temperature than Respiration.
c. In Combustion, energy is released in several steps, whereas in Respiration it is released in a single step.
d. Combustion can occur anywhere but respiration only occurs in living cells.

Thanks in Advance!

Answers

Answer:

(c) In combustion, energy is released in several steps, whereas in respiration, it is released in a single step.

Explanation:

Combustion releases energy in a single step in the form of light and heat. Whereas in respiration, energy is released in steps and is stored in the form of ATP.

Hope it is helpful...

Students conducted an investigation on the properties of three elements. What type of element should sulfur be labeled? plz help ;(

Answers

Answer:

one of them is oxygen but I'm not sure about the others sorry

explain reproduction in hydra​

Answers

Answer:

Budding

Explanation:

The common asexual method of reproduction by hydras is budding. Buds originate at the junction of the stalk and gastric regions. The bud begins as a hemispherical outpouching that eventually elongates, becomes cylindrical, and develops tentacles. The bud then pinches off and a new individual becomes independent. Buds are produced every two to three days under favorable conditions. Following unfavorable conditions, such as injuries or periods of scarce resources, hydras occasionally reproduce through transverse and longitudinal fission.

Which monomer – polymer pair below is mismatched? *
2 points
amino acid-protein
glucose-glycogen
glucose-starch
amino acids-nucleotide

Answers

Answer:

glucose-glycogen

Explanation:

Because extra glucose is converted into glycogen and stored for when it is needed. It is not a polymer pair.

as the frequency of a wave increases the sound ___​

Answers

Answer: Gets higher

Explanation:

Answer:

the sound also increases i will give example C: As the mass of the ball increased then how far the ball went also increased.

E: According to the data, if the mass of the ball was 5, then how far the ball rolled would be 2 Meters.

E: According to the data, if the mass of the ball was 15, then how far the ball rolled would be 4 Meters.

Explanation:

Help with this plz.

Answers

Answer:

just bro easy aquatic answer

Explanation:

hope it helps .

copy and paste .

mark as brainlest.

Answer:

i'd say it's camouflage...?

Is motocross Kinetic energy or Potential energy

Answers

Answer:

The more you pull the throttle back the more gas you will use powering the engine to make kinetic energy which will make the dirt bike move faster.

Explanation:

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