how does the brightness/luminosity change throughout the cycle of a massive star?​

Answers

Answer 1

Answer:As the size of a star increases, luminosity increases. If you think about it, a larger star has more surface area. That increased surface area allows more light and energy to be given off. Temperature also affects a star's luminosity.

Explanation:

Answer 2

Answer:

Brightness-Luminosity Relationship:

At a particular Luminosity, the more distant an object is, the fainter its apparent brightness becomes as the square of the distance

Explanation:


Related Questions

What might happened if we continue burning fossil fuels at the rate we do today ?

Choose the best answer

A. The cost of fossil fuels may drop

B. Fewer and fewer oil wells and coal mines may be constructed

C. The earth’s climate may change rapidly

D. Automobiles will become less fuel-efficient

Answers

Answer:

A

Explanation:

because when we use more fossil fuel new oil well will be discovered and due to this the fuel value will became drop down.

We will continue to see rising global temperatures and climate change if the world does not reduce the levels of carbon dioxide emitted by burning fossil fuels. Thus, option A is correct.

What are the consequences of burning fossil fuels?

Carbon emissions will stay high as long as the world depends on fossil fuels for both energy production and transportation.

It is obvious that reversing man-made climate change is generally better as stopping it when its impacts become more severe.

Even while warming would undoubtedly slow if we stopped using fossil fuels right away, greenhouse gas removal from the atmosphere will eventually be necessary.

Therefore, because as we utilize more fossil fuels, new oil wells will be found, which will lower the price of fuel.

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Two things that are common to all cells are:
O A nucleus and a cell membrane
O A nucleus and mitochondria
O A cell wall and a nucleus
O A cell membrane and cytoplasm
O A nucleolus and chloroplasts

Answers

Answer:

A nucleus and a cell membrane.

Explanation:

The first option is the correct answer

Why does the starch need to be digested?

Answers

Answer:

starch molecule is too big to fit in the cell, and when starch breaks it turns into glucose, which your body can burn it for energy.

Explanation:

10. What is another name for the large intestine?
liver
gall bladder
nucleus
colon

Answers

Answer:

The answer is colon

Explanation:

Tumors can be one of the symptoms of cancer. Cancer occurs when there is a
malfunction with the cell's ability to enter--

A. Photosynthesis

B. Mitosis

C. Respiration

D. G ( with a little zero on the bottom )

Answers

Answer:

B

Explanation:

Cancer is essentially a disease of mitosis - the normal 'checkpoints' regulating mitosis are ignored or overridden by the cancer cell.

Which phrase is not an example of intercellular communication?
1. chemical signal from pituitary gland to adrenal gland
2. electrical signals pass between heart cells
3. chemical messengers dock onto receptors of adrenal gland
4. a vesicle encloses over a nutrient molecule

Answers

Answer:

1.

Explanation:

A signal from one gland to another would not be intercellular, as "inter" means inside. This means intercellular would stand for "Inside the Cell"

Sex cells divide to produce ___________________(sperm or egg).

Answers

Answer:

Egg

Explanation:

I think it a true answer

Answer:

Sperm in males and eggs in females.

Explanation:

Sex cells divide to produce both the sperm in males, eggs in females.

!!!!!!!WILL MARK BRAINLIEST!!!!!!!!!A sudden increase in activity level can cause stress fractures.
OA True
OB. False

Answers

Answer:

Its True

Explanation:

This is called bone stress. This can develop into a stress fracture if the level of load bearing/activity is not reduced. Stress fractures commonly occur when there is a sudden change in physical activity or increase in training without enough rest time for the bone to adapt and remodel.

Pls help due in 5 minutes WILL MARK BRAINLIEST

Answers

ii = to investigate osmosis in living cells (so he needed to cut or use two potato’s with equal size).

iii = time and solution concentration (maybe)

Plant use sunlight, water, & carbon dioxide to produce glucose & oxygen. Plants are then able to use the glucose produced by the process described above as a quick source of energy for their cells, Which of the following molecule groups would glucose be classified as?

Answers

Glucose is by far the most common carbohydrate and classified as a monosaccharide, an aldose, a hexose, and is a reducing sugar.

Using the sorting results from Part C, complete the modified Punnett square below.First, fill in the frequently of each gamete produced by the F1 by dragging one green label to each green target at the TOP and LEFT of the Punnett square.Then, fill in the frequency of each F2 genotype by dragging one blue label to each blue target inside the Punnett square.Finally, fill in the number of additive alleles in each F2 genotype by dragging one pink label to each pink target.

Answers

Answer:

a) 1/16, b) 4/16, c) 1/16, d) 1/16, e) 4/16, f) 4/16, g) 0 + alleles, h) 1/256, i) 1 + alleles, j) 4/256, k) 2 + alleles, l) 16/256, m) 3 + alleles, n) 24/256, o) 4 + alleles), p) 36/256, q) 5 + alleles, r) 24/256, s) 6 + alleles, t) 16/256, u) 7 + alleles, v) 4/256, w) 8 + alleles, x) 1/256.

You will find the uncompleted Punnett square (missing in the problem statement) and the complete modified Punnett square in the attached files

Explanation:

Due to technical problems, you will find the complete explanation in the attached files

10 POINS Q: The following methods will melt an ice cube quickly, EXCEPT
A. put it in an insulating container
B. hold it in your hand and change hands when one hand gets cold
C. put it a glass of room temperature water
D. break it into pieces and warm up the pieces

Answers

Answer:i think it C srry if im wrong

Explanation:

Answer: It’s A

Explanation:

It you hold the cube in your hand it will melt because of the body heat. If you break the pieces and warm them up, it will melt. If you put it in a glass of room temperature water, the water would absorb the cold and it will melt. But if you put it in an insulated container, it will keep the cold in hence it will not melt the fast.

Petroleum is a natural resource that is found below the surface of the Earth. Petroleum is unevenly distributed on Earth, but it is most often found in petroleum traps, which are underground rock formations that block the movement of petroleum.
Which of the following best describes what must have happened in the past in an area with a large petroleum trap?
A.
Permeable underground rock formations must have allowed the movement of organic matter deep into the Earth. Then, the organic matter must have been exposed to freezing temperatures until it formed petroleum.
B.
Impermeable underground rock formations must have blocked the movement of organic matter through the Earth's surface. Then, the organic matter must have decomposed to form petroleum inside the rock formations.
C.
Organic matter must have been exposed to intensely cold temperatures until it became petroleum. Then, the petroleum must have moved up to the Earth's surface through permeable underground rock formations.
D.
Organic matter must have been buried and placed under intense heat and pressure until it became petroleum. Then, the petroleum must have collected inside an impermeable underground rock formation.

Answers

Answer:

The answer is D.

Explanation:

Remember heat and pressure.

The statement that best describes an action that has happened in the past in an area with a large petroleum trap is as follows:

Organic matter must have been buried and placed under intense heat and pressure until it became petroleum. Then, the petroleum must have collected inside an impermeable underground rock formation.

Thus, the correct option for this question is D.

What is the Petroleum trap?

The petroleum trap may be defined as a methodology that deals with the subterranean rock formation that considerably restricts the migration of petroleum and its components and causes it to accumulate in a reservoir that can be exploited.

Petroleum, crude oil, etc. are formed from the organic matter that has been buried millions of years ago. These organic matter are placed under intense heat and pressure in order to form components like petroleum. These formed components are then collected inside an impermeable underground rock formation.

Therefore, the correct option for this question is D.

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PLEASE ANSWER QUICKLY! WILL GIVE BRAINLIEST

The chart shows information about four ecosystems. Based on the information in the chart,

which
ecosystem most likely has the highest biodiversity?

A. W
B. X
C. Y
D. Z

Answers

Answer:

answer is B) x

Explanation:

i just took the quiz on edge

The chart shows information regarding the four ecosystems that has the highest biodiversity. As per the table ecosystem, X has the highest diversity. Hence option B is correct.

What is an ecosystem?

An exosystem is the system of ecological interaction of different environments and can be on land and in water. The system is dynamic and thus offers a wide range of species.

The ecosystem is thus a biodiversity hotspot and as per the table, the ecosystem X gets more of the high temperature and has s size square of 100 miles.

Find out more information about biodiversity.

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Please help ASAP
In what phase of mitosis does
the nuclear membrane reform
around the nucleus?
A. prophase
B. anaphase
C. telophase

Answers

Answer:

your answer is c

Explanation:

telophase

Mitosis ends with telophase, or the stage at which the chromosomes reach the poles. The nuclear membrane then reforms, and the chromosomes begin to decondense into their interphase conformations. Telophase is followed by cytokinesis, or the division of the cytoplasm into two daughter cells.

hope this help

Answer:

Telophase since that's the stage when the splitted chromosomes are being enclosed to form the dna inside of nucleus, which requires the nucleus membrane to form.

prophase is when nuclear membrane breaks to get the chromosomes ready for metaphase.

anaphase is when chromosomes are pulled apart.

Select the correct answer from each drop-down menu.

Augustine is writing an essay on stem cells. Help him by completing the sentences.

Stem cells have the ability to divide

and produce unspecified cells. They can be developed into a required tissue because of their ability of

.

Answers

Answer:

Stem cells have the ability to divide through mitosis and produce unspecified cells. Stem cells can be developed into a required tissue because of their ability of differentiation.

Explanation:

A stem cell is a cell that is in an undifferentiated state. This means that it has not specialized in a specific type that carries out a specific function of that tissue, which does not imply that stem cells do not have their own function. The concept of stem cell is due to the ability to originate specialized cells from one or more tissues, depending on the degree of potency or plasticity it has. They are found in all multicellular living organisms. Their main characteristic is that by reproducing through the process of mitosis (they divide into two cells) they can form more stem cells or differentiate, that is, they become specialized cells, in such a way that they are essential for the renewal of cells in different tissues. and to repair them.

Stem cells have the ability to divide through mitosis and produce unspecified cells. They can be developed into a required tissue because of their ability of differentiation.

Stem cells are a special type of cell that may develop into a variety of specialized cells inside the body. They have the ability to differentiate into more specialized cells through the process of mitotic activity (mitosis) and perform restorative and regenerative roles.

Stem cells have significant and potential treatment for a variety of diseases due to their capacity to repair, regenerate, and grow into certain specialized cell types.

For example, bone marrow transplantation for people suffering with sickle cell disease.

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Other organisms were another factor. What kinds of changes in other populations of organisms could be affecting the moths?

Answers


When the environment changed, due to pollution, the moth population shifted because light-colored moths became easier to see so they were eaten more often. Organisms that survive have a better chance of reproducing so the population continues to grow. Human actions affect other populations.

The presence of the industrial revolution caused moths to evolve, as different colored moths became dominant in certain phases of climatic changes, such as the black moth, which gained advantage during the industrial revolution.

What is the significance of the evolution of moths?

In moths, evolution occurred as a result of changes in climatic conditions, such as before the Industrial Revolution, when the environment was clean, giving light-colored moths an advantage over the predator-favored black moth. The environment became darker after the industrial revolution as a result of smoke, which favored dark moths.

Hence, the presence of the industrial revolution caused moths to evolve, as different colored moths became dominant in certain phases of climatic changes, such as the black moth, which gained advantage during the industrial revolution.

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1. Suppose a town wants to buy a polluted marsh on an abandoned factory's land, clean up the marsh, and use the area as a nature center for the town. What are two costs and two benefits of the town's proposal?

Answers

Answer:

The correct answer is given below:

Explanation:

If a town wants to buy a polluted marsh region on a factor's land that is abandoned and clean up the marsh and use the particular area as a nature center for the town there would be some costs and benefits of this which are:

Costs of the proposal:

Such a plan requires economic support as it costs a huge amount of money, how the town will get the money for this?

Some taxpayers may raise the question of how the town can use their money for a plan that requires money for cleaning.

Benefits:

Nature centers can help for education purposes for pollution its effect and how to control it. It also leads to tourism and jobs.

Nature and animals will be benefited too

A dinosaur has 40 chromosome pairs. What is its diploid number of chromosomes?

80

40

20

0

Answers

80 because of each pair

does addiction contribute to martial problems?
Yes or No? and why?

Answers

Answer:

Yes. It contributes to marital problems because for example lets say you have a husband that is addicted to alcohol he is going to spend hundreds of dollars on alcohol every month and you are eventually going to get tired of not having enough money to pay the bills and get groceries. If your husband doesn't get rehab if will eventually get worse & rehab also costs money. Nobody will want to put up with that. Another example is if your husband is addicted to gambling your money is going to go down the drain very quickly leaving you bankrupt and most of the times people that get very involved with gambling gets mixed in with the wrong people.  

Explanation:

These are examples of how addictions can contribute to problems in a marriage.

:)))

Which is a negative effect of hydroelectric power?
thermal pollution
blocking fish migrations
emitting harmful chemicals into the atmosphere
discharging harmful chemicals into watersheds​

Answers

Answer:

I would say blocking fish because hydroelectric is the cleanest energy source  

Explanation:

Ples help!!! What is the relationship between heat waves and drought?

Answers

This is what I got hope it helps

URGENT!!!

Subdivision of the PNS that controls voluntary activities such as the activation of skeletal muscles.
A. Autonomic Nervous system
B. Central Nervous System
C. Peripheral Nervous System
D. Somatic Nervous System ​

Answers

Answer:

Peripheral nervous system

The peripheral nervous system (PNS) is divided into the somatic nervous system and the autonomic nervous system. The somatic nervous system (SoNS) is the part of the peripheral nervous system associated with the voluntary control of body movements via skeletal muscles.

How many dorsal fins do lobe-fin fish have?
Select one:

a.
3

b.
4

c.
2

d.
1

Answers

Answer: C. 2

Explanation:

It has two dorsal fins

there are more hydrogen atoms in living organisms than any other atom, but oxygen is more abundant in terms of mass.
why is this statement true?​

Answers

Answer:

They are compounds made of the same two elements, but each contain different numbers of atoms. ... There are more hydrogen atoms in living organisms than any other atom, but oxygen is more abundant in terms of mass. Why is this statement true? Hydrogen atoms have a lower mass than oxygen atoms.

Answer:

The statement is true because there is more of the actual atom hydrogen in living organisms, as oxygen is more abundant in the world, but not in every living organism.

Explanation:

For example, there is more hydrogen in living organisms added up, but there is more oxygen in the world. If you add them all up, the mass of oxygen would be more then hydrgen, but more hydrogen in actual living organisms.

Which of the following is not a behavior adaption?
A. Birds migrating
B. Newborn cat meaws
C. Teaching a dog to "sit" om command
D. A baby crying

Answers

Answer:

a baby crying

Explanation:

a baby crying

Why do you think mapping the bedbug genome may help scientists control pests?

Answers

Explanation:

When mapping the genome, it shows where other pests are more likely to appear. This means more control over the rate of pest growth, and they can stop reproduction from increasing.

Understanding the genome will enable scientists to know what traits the bug has and whether they have any resistance to insecticides. The bugs may have natural resistance to certain insecticides, but not to others. This research may help scientists develop effective insecticides.


Behavioral responses in organisms require communication between
A.
an organism's cells and systems.
B.
an organism's cells and bacteria.
C.
an organism and its environment.
D
one organism and another.
Reset
Submit

Answers

Answer:

Behavioral responses in organisms require communication between an organism and its environment (option C).

Explanation:

The behavior of an organism depends on the function of relationship with the environment that surrounds it, and the way to respond to the diverse stimuli that are in this environment.

Behavioral responses always occur as a result of the interaction between the physical environment and other living organisms. This interaction triggers a series of stimuli that are perceived by the senses and processed by each organism, developing an appropriate response to each of them.

Answer:

A.an organism's cells and systems.

Explanation:

Got it on a study island

Hope this helps anyone :D

How many times can each bit of blood be pumped around the body each day? ​

Answers

Answer:

five litres (eight pints)

Given that the tundra is very dry most of the year, why don't plants that live on the tundra have deep roots to search for water?​

Answers

Explanation:

plants that are shorter and need little to no soil are most efficient. Lichens, which are part fungus and usually part algae, don't need extensive root or water-transportation system

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A person riding in an elevator travels 180 feet in 30 seconds. What equation represents this relationship? How many feet will this person travel in 10 seconds? Solve the following systems of equations. -x + y = -2 and y= -4x + 3 Hows my Poem?murky water, drowning falling farther. hold my breath, but how much longer, stretch my body but I can't see the bottom, this is life, but no I won't accept it so I push harder, this can't be life, this can't be it, I'll break the mold, ill be bold, ill be me, but how when I am pulled underneath, sucked down by curiosity, wondering what it's like to just give in, don't fight and let the water win, push out the air in my lungs like I push out my self, lose it all under water, hiding behind this murky water, you won't see me, the true me has left this body, gone and with it my sense of self, I will be like everybody else, society pushes all this weight on me, ive given in I won't break free, this is me, wait no it's not, it's just a shell of my body, the girl who used to be herself until she saw that thats not what evrybody else wants, so now shes gone. Murky water, pushes me down but I'll never reach the bottom, why have I given in? Why can't I be my own person, accepted as me and not just another nobody? floating through the water, it's getting harder, to hold my breath. What if I just let go? Will I be free, can I soar and spread my wings, take the easy way out instead of pushing, not who I'm supposed to be but ending it will be easy. No, ill take it, become who I'm not supposed to be just to be accepted by society. Unhappy, no not in my vocabulary because if I let myself believe, this fake smile will come tumbling, down... deeper I sink. Curse my curiosity, wondering what it's like to finally fit in. It's not what it's made out to be, I should have kept fighting. I am unsteady but I can't show hide my fear and sadness or I'll rise to the surface, but once again I'll be different, always at war with myself, I feel these things but I guess it's just me, nobody else. why am I this way, I'm somebody else, not me, I am a little plastic barbie doll sitting on the shelf. Murky water, don't give up you'll be pushed down harder, remember yourself and it will all be great, you won't suffer the same fate, as me, or the shell of the girl who used to be. Respostas 2 M3 M5 M7 M 8 M what were the causes of world war 1 and how did americans help the allies during the war?Someone help me please b) of the people who bought ice creams, 35%bought strawberry, 44% bought chocolate athe rest bought vanilla How much moneywas raised from the sale of vanilla icecreams? Which suffix is used to make a noun? -OUS -ity -ed Compare the two DNA sequences. 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