How is it possible for the sun to be more luminous than a white dwarf if the sun has lower temperature

Answers

Answer 1
A white dwarf may be hot but it is not generating energy, it is losing it.

A white dwarf is the remains of a star after fusion reactions have finished. The core collapse which creates a white dwarf makes it initially very hot. It can be over
100
,
000
K
.
White dwarfs emit radiation while they cool down over a very long time period. They are very small and have very low luminosity.
A star like the Sun on the other hand is constantly producing energy from fusion reactions in the core. Although the surface temperature may only be
6
,
000
K
, the core is at
14
,
000
,
000
K
and constantly producing energy. Hence the Sun is much larger and much more luminous.
Red giant stars are even cooler at less than
4
,
000
K
. They still have fusion reactions taking place in or around the core. They are very large and very much more luminous than the Sun.

Related Questions

PLS HELP IM BEING TIMED

Explain one key reason why many Europeans are willing to pay higher taxes to support a welfare state in their countries.

Answers

Answer:

The taxes are higher

Explanation:

Because we have (in Sweden) free health care for children under 18 when ur over 18 u will only pay til you have paid to a specific amount then you have discount and then its free (every year it will go back to cero)
School is free lunch in schools are free we don’t pay for anything not even textbooks.
Medication for people under 18 is free. People with low income pay little or no tax rich people pay higher taxes. Its all about balance. We don’t like to be like the US but still we have a lot of segregation. I hope my answer somehow helps

According to the information in the chart, which two countries are economically interdependent and would make the most effective trading partners?

A) Luxembourg and Romania
B) Norway and Portugal
C) Romania and Norway
D) United Kingdom and Portugal

Answers

Answer:

c. romania and norway

Explanation:

k12

Romania and Norway are economically interdependent and would make the most effective trading partners. Thus, option C is correct.

 

What is trading?

Trading, as contrasted to purchasing, which denotes an actually purchase strategy, is the act of purchasing and selling financial instruments including stocks, notes, commodities, and consumables.

The HDI of Romania's business is extremely high, and its labor force is highly trained. its residents experience a high. Its finance industry is the largest supplier to its income, and it is a prominent hub for massive private banking.

An individual who buys and sells capital instruments on any financial market, whether for themselves or on behalf of someone else or entity, is known as a trader. Therefore, option C is the correct option.

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Please help Thank you ! :)

Answers

Answer:

Primate cities

Explanation:

Who was the first person to ever walk the Earth?

Answers

Answer:

Adam(Biblical), No one knows(Logic)

Explanation:

If you're looking for a Biblical answer, the answer will be Adam. If you're looking for more of a Logical answer, the answer is...no one knows.

Q-Identify and explain any four ways how sea erodes the land along the coast.
Answer plzz

Answers

Hydraulic Action, Abrasion, Attrition and Solution (aka. corrosion)

Help!!!!PLEASE HELP ME!!!!24 POINTS!!!

Answers

Answer:

its b

Explanation:

b

What problems can occur if a country's economy is focused mainly on
farming, fishing and mining?

Answers

Problems with farming can be bad weather then they dont have money because theres no export or import. Fishing natural catastrophe can cause fishes to die like plastic in ocean then theres no fish and no money for the country

How is wind related to air tempature and air pressure? PLSS HELP EMERGENCY​

Answers

Answer:

 on Earth, the main differences in air pressure are caused by differences in temperature. Cool air produces high air pressure and warm air produces low air pressure. Warm air wants to rise. When warm air rises, cool air will move in and replace the warm air, causing wind.


Which part of the South American continent is suitable for the
practice of agriculture? Why?

Answers

Answer:

Growth in South American Agriculture:

The primary producer is Brazil, with abundant land and a significant rural labour force. Brazil's Cerados region covers an estimated 207 million hectares (equal to twenty six per cent of the US lower forty eight states agricultural land).

Explanation:

What's the furthest point from land in the world?

Answers

Answer:

Point nemo

Explanation:

your answer is point nemo :)) have a great day

What is the difference between "Magma" and "Lava"? A. It is just a name change, magma is melted rock inside of the earth in lava is what magma is called if it reaches the surface of earth B. Magma is less dense than lava C .Magma is formed deep in earth in lava forms near the surface of earth D.Magma makes Igneous rocks and lava forms volcanoes

Answers

Answer: A. It is just a name change, magma is melted rock inside of the earth in lava is what magma is called if it reaches the surface of earth

Explanation:

Magma is referred to as a hot, molten rock that is under the surface of the Earth When the magma then reaches the surface of the Earth, it is referred to as lava.

Therefore, the correct option is A "It is just a name change, magma is melted rock inside of the earth in lava is what magma is called if it reaches the surface of earth".

Borders drawn to avoid dividing islands

Answers

Dividing islands north and South Korea

Which of the following is true of an industrial society?
Check all that apply
A.) The birthrate rises steadily
B.) There are fewer infant and child deaths
C.) The cost of raising a child drops significantly
D.) Birthrates drop, and may even drop low enough to reverse population growth

Answers

Answer:

The correct answer is D. Birthrates drop, and may even drop low enough to reverse population growth.

Answer:

It's A and D

Explanation:

<3

If you could travel in time and visit the park shown on the map 100,000 years in the future, what changes do you think will have taken place to the elevations of Goodnight Peak and Brushy Butte? Explain your answer.

Answers

Answer:

erosion by wind and water will help the peaks to become smaller.

If we could travel time and visit the park shown, the changes will be that the reduction of the peaks' heights will be aided by wind and water erosion.

What is soil erosion?

The soil fragments are loosened or washed away during this process in valleys, oceans, rivers, streams, or far-off areas. Due to human activities like agriculture and forestry, this has gotten worse.

The process of soil eroding is ongoing and can happen slowly or rapidly. As a result, there is ongoing topsoil loss, ecological harm, soil collapse, etc. The wearing away of the top soil layer is known as soil erosion. It contributes to soil degradation. The dynamic action of erosive factors, such as water, ice (glaciers), snow, air (wind), plants, and animals (including humans), is what causes this natural process. These factors determine the agents that cause erosion, which can be classified as water erosion, glacier erosion, snow erosion, and wind erosion.

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1. What is the equation for time when using a position-time graph?

2. What is the equation for displacement when using a velocity-time graph?

Answers

Answer:

1.) Slope of a Position-time Graph.

2.) The displacement can be found by calculating the total area of the shaded sections between the line and the time axis.

By
2
Sammi is a very curious person. She's been that
way since she was born.

Answers

Answer:

cool?

Explanation:

What is the measure of

Answers

I don’t know what you want to measure but in geography I only know these two:

Amplitude
The distance between an extreme position and a zero position in a swinging motion. Also corresponds to sea waves, the distance between the wave crest and its central position and constitutes half the wave height.

Richter scale
Used to indicate how strong earthquakes can be

How do erosion and deposition work together to create a moraine?

A.Waves cause erosion along coastlines and deposit sand away from the shore.
B.Surface water in rivers causes erosion, carrying sediment that gets deposited near an ocean.
C.Glaciers cause erosion as they melt, carrying sediment that gets deposited in a thick layer.
D.Winds cause erosion by blowing around sand that gets deposited in large piles.

Answers

Glaciers are dynamic ice structures that change their size and shape as they grow and melt. Glaciers cause erosion as they melt, carrying sediment that gets deposited in a thick layer.

---------------------------------------

Glaciers have a high capability of soil denudation and erosion. They are capable of transporting many materials of varying sizes y drive them down the hills.

Remember that in the glacier's interior, there are melted ice streams that acquire a high velocity. They can move material from the base of the glacier and produce erosion.

The term moraine refers to the material deposition caused by glaciers. According to the glaciers' dynamics and the material deposited, there can be several types of moraines.

Fontal moraine

Basal moraine

Endoglacier moraine

Lateral moraine

Central moraine

Basically, moraines types depend on how materials get deposited as the glacier melts, or stays stable, or gets closer to another glacier, etcetera.

Materials can get deposited when falling from the surface of the ice in different directions.

Material can sink into the interior of the ice and get deposited from there.

Material can be driven directly along the glacier's base, as internal streams carry them and the glacier melts.

---------------------------

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What problems can occur if a country's economy is focused mainly on
farming, fishing and mining?

Answers

Answer:

it may depend on how the country's economic growth

Between epicenter and focus. (A) Which represents the actual location of earthquakes origin? Why do you think so?

Answers

Most likely the earths core I’m pretty sure

There are only two chemical elements which are significantly magnetic and reasonably
common and had appropriate densities,_______and______They concluded therefore that the Earth had to have a______made of
and__________

Pls help me out

Answers

Answer:

Iron and Nickel

core

Iron and Nickel

Explanation:

Two of the most popular magnetic chemicals in the world are iron and nickel.

We can now match these metals with the description given in the question to check if they perfectly fit in the blanks.

The densities of iron and nickel are 7874kg/m3 and 8900kg/m3 respectively. To put this into perspective, the density of aluminium is only 2700kg/m3. This means that iron and nickel are really dense solid materials.  These materials are strong enough to make the core of the earth.

Because these materials are also magnetic and strong, we can say that they are the materials that form the solid core of the earth's structure.

Which major mountains are found In the valley & ridge region?

Answers

is a U-valley formed by movement in glaciers. A glacier or U-shaped valley has a wide flat floor and steep sides.
Glaciers are a thick mass of moving ice. V-shaped valleys become U-shaped valleys as glaciers move through them. First it is a typical river valley and then water flows into the cracks, which over time cuts a deeper V-shape. Glaciers then fill the valley, widen it and stretch the canal, which when the glacier melts leaves a U-shaped valley. Gravity causes the glacier to slide down. Then it pulls rocks, sand and gravel, ie sediment

. These wear down into the rock and form a U-valley. The differences between a V-valley and a U-valley are that a glacier works downwards and outwards while the V-valley then works its way down the glacier. and deepen the valley and change it to a U-shape.

u-shaped valley was formed by ice formation. U-shaped valleys are mostly found near the rocky mountain.
Glaciers pass through jagged mountain valleys making them smooth and u-shaped after the ice retreats.
The ice scrapes the sides and bottom

valleys are low land areas between hills or mountains. they usually have rivers that run through the middle

When a glacier pushes itself forward in a mountain landscape, the ice grinds not only on the surface but also on the sides of the valley and in this way characteristic U-valleys are formed

the valley is formed by erosion, or gradual wear of elements, such as water or wind. valleys can also be formed by movements in the earth's crust or gracias. the graciers drop depressions into the earth's surface
valleys are helpful to people because they are usually close to the river. the flowing stream provides access to food and potable water. they also give people exotic plants and animals to eat or harvest



In what type of landscape can you most often find this landform?
You can find U-dal in mountain areas everywhere in, for example, Sweden, Himalayas

Calculate the area of the figure below using the following information:

Area of triangle ABC = 7.95 square units

Area of triangle ACD = 9.8 square units

Area of triangle AED = 8.75 square units

HELP ASAP! Image of irregular pentagon with vertices points A, B, C, D, and E starting at upper left moving clockwise. Two dotted diagonal lines, one connecting vertices A and C, and the second connecting vertices A and D.
Picture shows a shape with 3 triangles, each labeled A, B, C, or D.

The area of the Figure ABCDE is ______ square units.

Answers

Answer:

9.8

square units

Explanation:

Answer:

7.95!

Explanation:

All you have to do is add them all together! :D Please mark me as brainliest!!!!!

Geographical information can appear in books called (calendars\sonneteers\journals\gazetteers). These books list locations such as countries or cities, and they include (telephone numbers\social statistics\historical background) for each location.

Answers

Answer: Gazetteers and Historical background

Explanation: Good luck! :D

Give two advantages of electrification of railways.give short answer​

Answers

Answer:

Electric-powered trains have a number of advantages over diesel engines. They have quicker acceleration, lower fuel costs, produce fewer CO2 emissions and are lighter, meaning they create less wear on tracks.

Explanation:

Answer:

Something something free points and stuff

what religion do the Navajo practice?

Answers

Answer:

raditional Navajo life is inseparable from religion, seeking to maintain balance between individuals and the universe and to live in harmony with nature. ... Navajo people view the earth as a spiritual mother, with family comprising a network of Holy People and livestock as well as human relatives.

Explanation:

A title given to a Muslim ruler, often a prince or tribal chief, is __________. A. emir B. knesset C. sharia D. sunni Please select the best answer from the choices provided

Answers

Answer:

A. Emir

Explanation:

A title given to a Muslim ruler, often a prince or tribal chief, is Emir.

Emir refers to an individual who is saddled with leadership responsibility of protecting, controlling, managing and maintaining all of the affairs of his subjects i.e the indigenes of the town he his ruling.

Generally, emirs are found in the northern part of various countries across Africa such as Nigeria, Sudan, Niger, etc. For example, Emir of kano, Emir of bida, etc.

Answer:

Emir

Explanation:

How do supranational organizations challenge state sovereignty?

Answers

Answer:

Supranational organizations tend to try and put their own rules and laws which the country members have to implement, which in turn means that they are becoming limited in their decision-making on a state level.

Explanation:

There are several supranational organizations in the world, and some of them are the European Union, African Union, and NATO. Even though they are all different and have their own unique characterisitcs, one thing that tends to be a common trait is that they all have their own governmental structure that tends to impose itself over the state governments.

These organizations are very lucrative and attractive for a lot of countries, but the governmental structure of these organizations also makes every member sign a lot of documents that make them obligated to respect and implement the decisions. This basically means that the country members are giving up on part of their sovereignty, and this can be best seen in the EU, where there has been a lot of problems because of it and there is an evergrowing backlash against it.

Which event was a major source of atmospheric oxygen?

photosynthesis

volcanic eruptions

decomposition of water

outgassing

Answers

Answer:

Photosynthesis was a major source of atmospheric oxygen.

Explanation:

Earth's atmosphere was not the same as it is in the past. For a larger portion of Earth's history, the atmosphere actually didn't have an atmosphere or the one it had was not suitable for complex lifeforms to develop. This all changed because of one major event, the process of photosynthesis.

Initially, it was the cyanobacteria that started to use this process in order to produce their own food and energy. Basically, this process meant that the cyanobacteria, and a lot of later organisms, were taking in carbon dioxide, use it for their own needs, and release the oxygen. The oxygen was released into the ocean and into the atmosphere, which resulted in a gradual change in the composition of the atmosphere to a degree where it was suitable for larger organisms to start to develop.

What factors create storms?

Answers

Wind conditions and energy
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