Which statement describes the general relationship between the temperature and the absolute brightness of main sequence stars?
As temperature decreases, absolute brightness increases.
As temperature decreases, absolute brightness remains the same.
As temperature increases, absolute brightness increases.
As temperature increases, absolute brightness remains the same.

Answers

Answer 1

Answer:

As temperature increases, absolute brightness increases

Explanation:

As temperature increases, absolute brightness increases

Answer 2

As temperature increases, absolute brightness increases. Therefore, option (C) is correct.

What is absolute brightness?

Absolute brightness, also known as absolute magnitude, is a measure of the intrinsic luminosity of a star, which is its total energy output per unit of time. Absolute brightness is defined as the brightness a star would have if it were placed at a standard distance of 10 parsecs (32.6 light years) from Earth. This standard distance allows astronomers to compare the luminosity of stars with different distances from Earth.

Absolute brightness is an important measure for astronomers because it helps them determine the true luminosity and size of a star. It also helps astronomers classify stars based on their luminosity and temperature, which is related to their evolutionary stage. For example, main sequence stars, which are stars in the process of burning hydrogen to helium, are classified based on their temperature and absolute brightness

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Related Questions

Look on the box that says ‘show genotype’. What is the genotype of the offspring

Answers

FF is homozygous dominant ff is homozygous recessive. Ff is heterozygous dominant. The phenotype for FF, and Ff is black. Phenotype for ff is white.

Which of the following describes the impact on human health from global climate change?

A) Excess greenhouse gases will cause competition among vectors for hosts, and the vectors will die off.
B) Global climate change will result in the warming of cooler regions and will increase the spreading of disease.
C) Melting glaciers will keep regions too cold and prevent vectors from migrating to these regions.
D) Warmer climates will prevent vectors from traveling to new regions and infecting more humans.

Answers

Answer: B

Explanation: B) Global climate change will result in the warming of cooler regions and will increase the spreading of disease.

Answer:

B) Global climate change will result in the warming of cooler regions and will increase the spreading of disease.

Explanation:

It will be right on the quiz. Have a great, meaningful, and productive day, fellows!

In which situation is work being done?
A. A woman lies on the ground.
OB. A boy stands on a chair.
C. A man pushes against a wall.
OD. A girl throws a ball.

Answers

OD a girl throws a ball

The hydrogen ion reservoir is located in the ____________________ and ATP synthesis occurs in the ____________________. In order to facilitate reproduction, independent of cell division, both of these organelles have _________________________ and _________________________.

Answers

Blank 1: Inner membrane of the Mitochondria
Blank 2: matrix of the mitochondria
Blank 3: their own nucleus
Blank 4: DNA

Hope this helps.

Front legs of a cat and the arms of a human share a bone structure that suggests a common evolutionary lineage. Therefore these skeletal structures are

Answers

Answer:

homologous

Explanation:

Homologous organs are organs that share some similarities in different organisms but whose function differ in these organisms.

:)

Forelimbs of cat and arms of human share a similar bone structure, suggesting a common lineage. These type of common structure are said to be homologous structures.

Organs that function differently in different organisms but have some similarities are known as homologous organs. Although the organs are structurally similar, they serve different purposes. One of the arguments used by scientists to support evolution is the existence of homologous organs.

Even though their structures are based on the same five-digit plan, human arms and the front legs of cats serve different purposes.

Therefore, forelimbs of cat and forelimbs of humans are said to be homologous structures.

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Most skin, hair, and nail fungal infections (including ringworm) are caused by ______.

Select one:

a.
dermatophytes


b.
viruses


c.
prokaryotes


d.
bacteria

Answers

Answer: it's a.

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4. Which of the following are parts of the amniotic reptile egg? (Choose all that apply) amniotic fluid albumen water space shell membrane​

Answers

The parts of the amniotic reptile egg include the amniotic fluid, the albumen, and the shell.

Parts of an amniotic reptile's egg

The various parts of amniotic reptile's eggs include:

The external shell which serves as a protective layerThe yolk which supplies energy to the embryoThe albumen supplies the embryo with water and proteinsThe extra-embryonic membranes - the chorion, the allantois, and the amnion.

The chorion serves as a channel for gaseous exchange between the embryo and the environment.

The allantois partially functions as waste manager and in respiration. It stores nitrogenous wastes and gets rid of them as well as participates in gaseous exchange along with the chorion.

The amnion protects the embryo against mechanical shocks. It also protects the developing embryo from being dehydrated.

In other words, the 3 extra-embryonic membranes protect, facilitate gaseous exchange, and ensure that wastes are properly disposed of.

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Answer: Everything Except Water space

Explanation:

look at the picture ​

Answers

Answer:

Gamma rays have a higher frequency than radio waves

what is the primary distinction of being an animal?
A) ability to reproduce
B) having a backbone
C) ability to digest
D) ability to turn sunlight into energy ​

Answers

Answer: A) ability to reproduce

Explanation:

I believe A if not so sorry

What happens when a coral pushes out the algae that live there?
coral cooling
coral bleaching
algae bloom
coral warming

Answers

I’m not sure if I’m exactly right but I say coral bleaching.

One would expect well-drained soils to have the highest organic matter contents where the climate is?

Answers

One would expect well-drained soils to have the highest organic matter contents where the climate is cool and humid.

What is organic matter?Reducing or eliminating tillage, which triggers a microbial action burst that hastens the decomposition of organic matter and raises erosion. Reduce erosion by taking the necessary action. SOM is mainly found in topsoil.The topsoil is the soil's topmost layer. The majority of the biological soil activity on Earth takes place there because it has the highest concentration of organic materials and bacteria.The topsoil is where most of the biological activity in the soil takes place and has the highest concentration of organic matter and nutrients. Without residue or living cover, soil is vulnerable to erosion.Histosols are soils that are rich in organic materials and unbroken plant matter.

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ASAP PLS There are lots of big words in genetics! One way to start thinking about the process of meiosis is to ask yourself some questions.

If two parents are contributing genetic material to their offspring, why don’t the genes and chromosomes double in each generation?

If each parent has two sets of genes and chromosomes, why do their offspring receive only one set from each parent?

Answers

Answer:

1) the genes and chromosomes do not double after each generations because parental sex cells are haploid and only contain one set of chromosomes. During fertilization the two cells fuse to form a diploid zygote with two copies of genes and chromosomes. For example a normal human has 46 chromosomes (2 copies of 23 chromosomes) during reproduction gametes which contain 23 chromosomes (haploid) fuse to form an offspring with the correct number of chromosomes ( 23 + 23 = 46).

2) offspring only receive one set of chromosomes from each parent so to maintain the chromosome number of humans. If this did not happen you would not be the same species.

The Smokey the Bear campaign attempted to suppress and eliminate wildfires from forested areas altogether. Explain how fire suppression can negatively impact the health of a forest ecosystem?

Answers

A. Suppression allows weaker, more vulnerable trees that would have been weeded out by fire to survive.

B. Suppression leads to less diversity of tree species, so beetles spread more quickly between trees.

C. Suppression leads to equal/even-age stands of mature trees, which the beetles prefer.

1. Naturally occurring wildfires are most frequently caused by lightning

2. NATURAL forest fires can temporarily increase fertility of a region

3. burning process releases nutrients which then fertilize the soil.

3a. fire chemically converts nutrients bound in dead plant tissues and the soil surface to more available forms

3b. fire indirectly increases mineralization rates through its impacts on soil microorganisms (Schoch and Binkley 1986).

4. slash and burn process successfully clears land for agriculture and introduces fertilizing nutrients into the soil, leaving it in excellent condition to grow crops.

AP ENVIRONMENTAL SCIENCE

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At present, only a very small proportion of genetically modified foods must be labelled. Some consumer advocates are urging the federal government to label all foods that contain genetically modified material, so that consumers may choose whether to purchase them or not. What are you views?

Answers

Genetically modified material is safe it was proven a ton of times no need to worry sometimes its even healthier than normal food.

Why are microorganisms used to produce enzymes?

If possible, focus on the production of pharmaceutical enzymes via microorganisms, but a general explanation is sufficient as well.

Answers

Microorganisms produce enzymes in order to break the macromolecules such as proteins and starches.

Why are microorganisms used to produce enzymes?

Microbial enzyme production occur to degrade natural polymers such as proteins, starches, or pectin. The microorganisms secrete the enzymes in order to extract nutrients from it.

So we can conclude that Microorganisms produce enzymes in order to break the macromolecules such as proteins and starches.

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What is the only cephalopod with an external shell?
A. nautilus
B. cuttlefish
C. squid
D. octopus

Answers

Answer:

the only cephalopod with an external shell is A. nautilus

Answer:

a. nautilus

Explanation:

Nautiluses are the only cephalopod with an external shell.

which of the following is a cause of a DNA mutation?

Answers

DNA Mutation is caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes. Thus, the correct answer is option D.

1.DNA Mutations are caused by environmental factors known as mutagens.

2.Types of DNA mutagens include radiation, chemicals, and infectious agents.

3.DNA Mutations may be spontaneous in nature.

Which source of renewable energy is the most location-dependent in its production?
hydroelectric
geothermal
wind
solar

Answers

It would be hydroelectric

Which of the following are an advantage and disadvantage of hydrogen energy use?

Advantage: Hydrogen is easy to store.
Disadvantage: Hydrogen is scarce.

Advantage: Hydrogen allows for zero emissions.
Disadvantage: Hydrogen is difficult to store.

Advantage: Hydrogen is an efficient form of energy.
Disadvantage: Hydrogen allows for pollution to be emitted.

Advantage: Hydrogen fuel has established infrastructure.
Disadvantage: Hydrogen is scarce.

Answers

The following are an advantage and disadvantage of hydrogen energy use and is denoted as option B.

Advantage: Hydrogen allows for zero emissions.Disadvantage: Hydrogen is difficult to store.

What is Hydrogen?

This is an element with a atomic number of 1 and exists as a colorless flammable gas.

It has to be liquefied which is why it is difficult to store and allows for zero emissions which makes it a clean source of energy.

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Based on the punnet square above, what is the probability that an offspring from this cross will have a homozygous recessive genotype ?

A. 100%
B. 50%
C. 25%
D. 0%

Answers

Answer:

C)25%

Explanation:

the results of the punnet square are:

1. TT (homozygous dom)

2. Tt (heterozygous)

3. Tt (heterozygous)

4. tt (homozygous recessive)

capital letters are dominant and lowercase are recessive

Answer:

25%

Explanation:

Homozygous Recessive: (homo means same) Both letters representing the genes are the same, and they are recessive (lowercase t)

Each box within a punnett square represents a 25% chance possible outcome.

There is only one box in this punnett square wherein both letters are lowercase t.

Pick one of the following genetic variations that have occurred in human evolution. Then pick one of the three causes of genetic variation (meiosis, replication errors, environmental impacts) and make a claim as to why you think that particular cause of genetic variation was the cause of the change. Use supporting research and/or data to support your claim.

- Smaller bodies
- Smaller brains
- Smaller teeth and jaws

Answers

Smaller teeth and jaws are due to genetic variation, which occurred by mutations (errors in DNA replication) and were selected to fill a suitable niche.

What is evolution?

Evolution is the mechanism of change of one species to adapt given environment, whereas mutations are the raw material for evolution.

In this regard, scientific evidence supports the fact that jaws evolved to become shorter in humans and thus adapt to a pastoral lifestyle.

In conclusion, smaller teeth and jaws emerged by mutations and were selected to fill a suitable niche.

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How can you use more renewable sources of energy? Select all that apply.
Use carpools or public transportation.
Stop using all forms of energy altogether.
Grow your own food and buy local products.
Wait for governments to make laws.

Answers

Answer: a and c

Explanation: You don't need to wait on the government to make laws to be able to be energy efficient, nor do you have to stop using all forms of energy altogether.

Which fossil fuel needs to migrate into
pockets in order for humans to extract it
from the ground?
A. gold
B. aluminum
C. petroleum
D. uranium

Answers

Answer:

LA RESPUESTA ES LA C) PETROLEUM

Explanation:

LA C) ES PORQUE SEGUN YO ES DE ACUERDO EL TEXTO AUE HAS MANDADO EN TU TAREA

What happens to the trees in the taiga as global temperatures rise?
They grow bigger and use more resources.
They lose their needles in the winter.
They grow farther up the mountains.
They grow farther down the mountains.

Answers

Answer:

C

Explanation:

because they grow more than others time

HELP THIS IS REALLY SERIOUS I NEED HELP AHHH I DONT WANT TO FAIL!! question:Those who support the alien theory believe that the ancient Egyptians were very primitive. What evidence about the ancient Egyptians suggests that this claim is inaccurate? Check all that apply. They built the Seven Wonders of the Ancient World. They invented an early version of the wheel. They had a well-developed agricultural system. They raised domesticated animals. They developed a writing system. They used early forms of tools.

Answers

The evidence about the ancient Egyptians that suggests that this claim is inaccurate are:

They had a well-developed agricultural system.They raised domesticated animals.They developed a writing system.They used early forms of tools.What is a Supporting Detail?

This refers to the use of evidence in order to validate a claim that is made through the use of factual or statistical data.

Hence, we can see that based on the fact that people thought that the pyramids of Egypt were built by aliens was false because there are supporting details to prove them otherwise and they are listed above.

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what do we call the outer layer of the nucleas?

Answers

double layered nuclear, the outer nuclear membrane is continuous with the membrane of the rough endoplasmic reticulum (ER), it also continues with the inner nuclear membranes since the two layers are fused together at a numerous tiny holes called nuclear pores that perforate the nuclear enevelope

Name the labeled structure

Answers

Answer it’s the left ventricle
The papillary muscle is in the left ventricle if the arrow is looking for more specific
Reason
See attached picture

Which organelle in the table is correctly matched with its function?

Answers

The organelle in the table that correctly matches its function is the ribosome because it produces proteins.

What is a ribosome?

A ribosome is an organelle that functions as a protein factory in the cell, whereas vacuoles contain dissolved materials and store water.

Mitochondria are energy producers by the process of cellular respiration, and lysosomes contain hydrolytic enzymes.

In conclusion, the organelle is a ribosome that produces proteins.

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look at the picture ​

Answers

Answer:

Clean + Renewable

Explanation:

Answer:

Clean and Renewable

Explanation:

hope it helps

Explain the scientific interpretation of the fossils found in the cradle of humankind.

Answers

The scientific interpretation of the fossils found in the cradle of humankind,

The Cradle of Humankind region comprises 15 major fossil sites, some of which date back 5-million years.

The name Cradle of Humankind reflects the fact that the site has produced a substantially large number of hominin fossils, some the oldest ever found, dating as far back as 3.5 million years ago.

How was the Cradle of Humankind formed?

The Cradle of Humankind Site comprises a strip of a dozen dolomitic limestone caves including the fossilized remains of ancient forms of animals, plants and most notably, hominids. The dolomite in which the caves formed, started out as coral reefs flourishing in a worm shallow sea about 2.3 billion years ago.

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Whats interesting to me in lookingI like history a lot, and looking at old historical documentsis to see that in the 1840s there was still a significant number, not the majority or anywhere near the majority, but there were a significant number of people in this country that were still questioning whether Indians were human, or whether Indians had souls, when we and many other people like our tribe had been running our own governments for a long, long time.Which sentence best integrates a direct quotation from the excerpt?A) Mankiller finds it interesting that, in old historical documents from the 1840s, there were a significant number of people who wondered if Indians were human. B) In describing the discrimination of the past, Mankiller points out the ignorance of the majority of people from the 1800s who questioned whether Indians were human or had souls. C) Mankiller describes how, in the mid-1800s, many people did not know that we and many other people like our tribe had been running our own governments for a long, long time.D) To emphasize the discrimination the Cherokee faced in the 1840s, Mankiller states that there were a significant number of people in this country that were still questioning whether Indians were human. How did President Nixon navigate foreign diplomacy issues between the USSR and China, both communist nations, while there was still a heavy anti-communist sentiment in America? Which of the following are properties of mechanical waves?A. The particles of the medium always move parallel to the wavemotion.B. Particles of the medium move back and forth, but do not movewith the wave.C. Wave motion begins with a disturbance in the medium.D. Waves transport energy from a source outward, away from thesource. How does interest rate affect the time value of money? Read the passage about the life of Jackie Robinson.Jackie Robinson was born on January 31, 1919, in Cairo, Georgia. He was the youngest of five children and raised by a single mom in relative poverty. Jackie was very much inspired by his older brother Matthew, who won a silver medal in the 200-meter dash at the 1936 Olympic Games, to pursue his talent and passion for athletics. He attended John Muir High School and then went on to Pasadena Community College, where he played football, basketball, track, and baseball. From there, Jackie went on to the University of California, Los Angeles, where his time was cut short due to financial hardship. Despite the fact that his academics were cut short, Jackies career was not.After leaving the University of California, Jackie served in the United States Army. Fortunately, he never saw combat. However, during this time, he was arrested and court-martialed for refusing to move to the back of a segregated bus. 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