If you "run the clock backwards" using the Friedmann equations, you can avoid a singularity; you just need the pressure and energy to behave in the right way when the Universe was very hot and dense. The catch is that "the right way" in this case means that ρ+3p<0; in other words, either the energy density or the pressure (or both) have to be negative. No conventional forms of matter are known that satisfy this inequality, so unless something really strange was going on in the early Universe, there must have been an initial singularity. (Or, more plausibly, there was a time in the early Universe where the spacetime curvature was sufficiently large that the laws of GR as we know them did not apply.)
Explanation:
What is the main cause of the increased greenhouse effect on earth?.
Greenhouse gases such as carbon dioxide, methane, and oxides of nitrogen tend to absorb some of the reflected infrared radiation and re-reflect it back towards the earth. This is what causes the greenhouse effect and it results in an increase in average mean temperature on earth.
I got this answer on quizlet, it is called "The Greenhouse Effect" I hope this helps :)
Difference between non-perenial and perenial
Answer:
Perennial is the term used for plants that have a life span of more than two years; in contrast, the non-perennial ones are capable of surviving a maximum of two growing seasons.
Explanation:
Hope this helped!
Which is the least fragile?
A) ceramic teacup
B) glass cup
C) icicle
D) plastic blocks
Answer:
glass cup.
Explanation:
i don't know the exact but i think correct
Which country Is known as dark continent
Related to social
I know the answer
Don't search in goolge
tell me fast anybody
Answer: lol soo easy its Africa i live there anyways.
9. What was necessary for the decomposers to become active? How do they produce carbon dioxide?
What is the other by-product?
Decomposers break down the dead organisms and return the carbon in their bodies to the atmosphere as carbon dioxide by respiration.
Explanation:
why do we find Tors only in South Africa
Answer:
well I can tell you this western Swaziland
Do you think the Yellowstone supervalcano will erupt in your lifetime? Explain why, and cite your source if you looked it up. (5 points)
Answer:
No.
Explanation:
As of 2021, someone posted "There's no indication that the Yellowstone magmatic system is really going to be waking up anytime soon,"
Therefore, I feel confident that the Yellowstone super-volcano won't erupt in my lifetime.
Is the Donbas majority Ukrainian or Russian?
They are from eastern ukraine, however appears to be Russian. A larger percent speaks russian as well as have russian ancestors.
HOPE THIS HELPS! & good luck !!! <3
Calculate the time on longitude 30 degree west when it is 11 am at place x which is located at longitude 80° East
What is one limitation of early film making? A. There was no costumes b.there were too many camera angles c.action lines were not recorded d. There were no sets
Answer:
I'm pretty sure it's c
Explanation:
It's the only one that makes sense because there were sets, there were costumes, and I don't think there were too many camera angles because that doesn't make sense either.
a nebula is called a stellar furnace why
Answer:
Star Forming Nebula
Explanation:
One such stellar nursery is the Orion Nebula, an enormous cloud of gas and dust many light-years across. Turbulence from deep within these clouds creates high density regions called knots. These knots contain sufficient mass that the gas and dust can begin to collapse from gravitational attraction.
Why is it important to investigate our daily household water use?
Answer:
We need to investigate our daily household water use because if we do, then we know how much water we are using, which is helpful for two things. For one, there is knowing how much you use for your water bills, to make sure you don't over spend what you can't pay, and then there is also knowing it for water conservation. For example, if you are in a drought, then you want to make sure that you don't overuse the amount of water you have.
Explanation:
what is the capital of london
Answer:
The capital of England is London
The crab nebula is the result of a that was witnessed on earth in the year 1054.
Answer: a supernova
Explanation:
On the map, find the X that shows where the places are located.
Answer:
1. Cuba
2. The Bahamas
3. Puerto Rico
4. Martinique
Hope it helps!
Compare and contrast the four main types of clouds and the weather they indicate.
Answer: Cumulus, Cirrus, Stratus, Fog
Explanation:
Clouds with Vertical Development is a cumulus cloud.
Low clouds is Fog.
Middle clouds is Stratus cloud.
High clouds is a Cirrus cloud.
What is the highest office an aapi person has held in the u. S. Government?.
Spanish portuguese and quechua are a few of the languages spoken in the countries of.
Answer:
Hello there!
American Spanish:Argentina,Chile, Peru, Columbia, Bolivia, Venezuela, Panama, Costa Rica, Honduras, El Salvador, Guatemala and Mexico
Spanish:Spain
Brazilian Portuguese:Brazil
Portuguese:Portugal
Quechua:Peru and parts of Bolivia, Chile, Colombia, and Ecuador.
Spanish, Portuguese, and Quechua are among the languages spoken in various countries in Latin America, with Spanish being the most widely spoken language in the region.
Spanish is the official language of many countries in Latin America, including Mexico, Colombia, Argentina, Peru, and Spain. It is also widely spoken in other countries like Chile, Ecuador, Venezuela, and Guatemala.
Portuguese is the official language of Brazil, the largest country in Latin America. It is also spoken in other countries such as Portugal, Mozambique, Angola, and Cape Verde. Quechua is an indigenous language spoken primarily in the Andean region of South America. It is recognized as an official language in Peru, Bolivia, and Ecuador. Quechua has different dialects and variations depending on the specific region.
Learn more about Latin America here:
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Which scarce resource has most directly shaped Southwest Asia’s history and settlement patterns?
Answer:
3452
Explanation:
i justr had that question
Why doesnt the atlantic ocean and pacific ocean mix.
What are the cycles that use a catalyst to cause the reaction?
A. Catalytic cycles
B. Decomposition reactions
B. Combustion cycles
C. Double replacement reactions
To cause the reaction, catalysts use the catalytic cycles, decomposition reactions, and combustion cycles.
What do you mean by a reaction?A reaction refers to the chemical process where substances mutually act and are changed into different substances.
Catalytic cycles refer to the multistep reaction that involves the catalysts. It is considered the main method that describes the major role of catalysts.
Decomposition and combustion cycles are also used by the catalysts.
Therefore, A and B are the correct options.
Learn more about the reaction here:
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It takes brothers John and Dan the same amount of time to clean the room they share, but John can mow the lawn faster than Dan.
Answer:
if john mowed the lawn and dan cleaned their room
What is the name of the phenomenon that warms the earth’s surface?.
Answer:
The Greenhouse effect
Explanation:
The greenhouse effect is a process that occurs when gases in Earth's atmosphere trap the Sun's heat. This process makes Earth much warmer than it would be without an atmosphere. The greenhouse effect is one of the things that makes Earth a comfortable place to live.
What statements about the subcontinent are accurate?
Answer: if youre using this is the answers
It is more prone to invasion than East Asia.
It was invaded by Aryan tribes in 1500 BC.
It has recently experienced strong economic growth and educational improvements.
WILL GIVE BRAINLIEST IF UR RIGHT
Which statement BEST explains the infant mortality rate of Japan?
A) Japan receives international aid for their children.
B) Japan's isolated location prevents the spread of disease.
C) Japan's high standard of medical care means children are healthy.
D) Japan has a communist government and does not accurately report information.
Answer:
C
Explanation:
A and D just doesn't make sense, B is wrong because they have tourists that may spread diseases, so it should be C.
Let me know if you got it right.
ccording to the moment magnitude scale (Mw), a magnitude 8 earthquake would be 1,000 times greater than a magnitude ________ earthquake.
Answer:
The answer is 5
Explanation:
According to the moment magnitude scale (M
w), the amplitude of ground shaking during
a magnitude 8 earthquake would be 1,000 times greater than a magnitude 5 earthquake.
2. The Earth's mantle flows in circles, causing tectonic plates to move. What is an effect
of these moving plates?
A. Intense heat flows from the Earth's core.
B. The atmosphere acts like a giant blanket.
C. Gases are released into the atmosphere.
D. Volcanoes are created.
Answer:
volcanoes are created
Explanation:
please add brainliest: so the tectonic plates clashing into eachother create volcanoes because theplates have magma rise from the mantle.
A radiometric age for a mineral crystal within an igneous rock measures the amount of time that has passed since the ________.
A radiometric age for a mineral crystal inside an igneous rock measures the amount of time that has passed since the atoms within the crystal were part of a body of molten magma.
What is igneous rock?Igneous rocks create when lava colds and crystallizes, either on the boundary of the Earth or heavy inside the crust.
Because of the high heat present underneath, all magma forms in the lower crust or upper mantle.
A mineral crystal's radiometric age in an igneous rock indicates how long it has been since the atoms within the crystal were part of a molten magma body.
Learn more about the radiometric age, refer to:
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Which hemisphere receives more direct sunlight on December 21?
Answer: The Southern Hemisphere.
Explanation: The Southern Hempisphere recieves more direct sunlight on December 21st because simply has more sunlight to reflect! The winter solstice is the longest day of the year in the Southern Hemisphere. This means it experiences more sunlight on this day than any other. Hope this helps:)
Which two states have more than 20 million people?
California and Texas
hope it helps...!!!
