Describe the different hypothesis (Nebular Hypothesis, Planetesimal Theory, and Tindal Theory) explaining the origin of solar system.
Answer:
Nebular Hypothesis:
According to this theory, the Sun and all the planets of our Solar System began as a giant cloud of molecular gas and dust. Then, about 4.57 billion years ago, something happened that caused the cloud to collapse. This could have been the result of a passing star, or shock waves from a supernova, but the end result was a gravitational collapse at the center of the cloud.
From this collapse, pockets of dust and gas began to collect into denser regions. As the denser regions pulled in more and more matter, conservation of momentum caused it to begin rotating, while increasing pressure caused it to heat up. Most of the material ended up in a ball at the center while the rest of the matter flattened out into disk that circled around it. While the ball at the center formed the Sun, the rest of the material would form into the protoplanetary disc.
The planets formed by accretion from this disc, in which dust and gas gravitated together and coalesced to form ever larger bodies. Due to their higher boiling points, only metals and silicates could exist in solid form closer to the Sun, and these would eventually form the terrestrial planets of Mercury, Venus, Earth, and Mars. Because metallic elements only comprised a very small fraction of the solar nebula, the terrestrial planets could not grow very large.
Planetesimal Theory:
The planetesimal theory, put forth by Viktor Safronov in 1941, explains planet formation in the early solar system from accretion of small bodies, growing in size as gravity attracted more and more objects. As the small bodies orbit, their gravity is very weak and they must rely on non-gravitational forces to stay together, such as radiation pressure and the emission of thermal photons.
Growth of the small planetesimal caused the strength of its gravity to increase. Growth to approximately one kilometer in size allowed the gravity of planetesimals to attract objects to them, increasing their size to seeds for planetary formation.
Collisions were common during the formation of the solar system and planets. Planetesimals continually collided and destroyed each other, but some planetesimals were able to withstand the impacts and grow, eventually forming into planets.
In contrast, the giant planets (Jupiter, Saturn, Uranus, and Neptune) formed beyond the point between the orbits of Mars and Jupiter where material is cool enough for volatile icy compounds to remain solid (i.e. the Frost Line). The ices that formed these planets were more plentiful than the metals and silicates that formed the terrestrial inner planets, allowing them to grow massive enough to capture large atmospheres of hydrogen and helium. Leftover debris that never became planets congregated in regions such as the Asteroid Belt, Kuiper Belt, and Oort Cloud.
Tidal Theory:
involving the approach near the Sun of another star. This set up tidal forces, and the instability of the Sun resulted in part of its mass being torn off to form the planets. The theory was proposed by Sir James H. Jeans (1877–1946) and Sir Harold Jeffreys.
What was the idea of allowing the 13 colonies to govern themselves without strict control of British laws known as?
Answer:
Salutary Neglect
Explanation:
Hope this helps1
Which was a common restriction included in the black codes?
Answer:
Black Codes restricted black's right to own property, conduct business, buy and lease land, and move freely through public spaces. States punished black men who were out of work, or those who were not working at a job that white people recognized.
PLEASE HELP ASAP!!
Select ALL the correct answers
Which two factors led to Latin Arnerican revolutions?
A.
the successful French Revolution
B.
the inwasion of Spain by the French
C.
the invasion of North America by England
D.
the successful Spanish Revolution
Answer:
The successful French Revolution and the successful Spanish Revolution.
I Hope its right if not so advance sorry :)
How do you reach enlightenment in Buddhism?
A. Through reincarnation
B. Through war
C. Through trade
D. Through meditation
Answer:
Through meditation .......
Answer: ans is D
Explanation:
What event occurred from 1861-1865
A. Revolutionary War
B. Battle of Bunker Hill
C. Civil war
D. World War I
Answer:
C. Civil warExplanation:
The American Civil War from April 12, 1861 to May 9, 1865, was a civil war in the United States fought between northern and Pacific states ("the Union" or "the North") and southern states that voted to secede and form the Confederate States of America ("the Confederacy" or "the South").
Answer:
Explanation:
C. Guerra civil
what were the personal liberty laws and what were they meant to do
Answer:
Personal Liberty laws were passed by northern state governments to counteract the provisions of the Fugitive Slave Acts and to protect escaped slaves and free blacks settled in the North. It was meant to protect African-Americans from being kidnapped and captured as fugitive slaves.
D-Day was significant to winning the war for the Allies because
describe how Ubuntu could help fight poverty
Answer:
Explanation:
A study conducted by McKinsey & Company found that “Ubuntu graduates will contribute $195,000 to society, while their peers will cost society $9,000.” In addition to providing child health care, the pediatric clinic offers prenatal and postnatal care, HIV and TB testing and treatment.
I will give brainliest please help me out guys
How does Columbus describe the people of Hispaniola? List at least three pieces of evidence from the passage.
In 1492, explorer Christopher Columbus claimed the island of Hispaniola for the Spanish crown. Columbus kept a journal during his expedition. Read the following passage from the 1492 journals of Christopher Columbus. Then answer the questions based on the readings. All of your answers should be in complete sentences.
Thursday, 11 October
Presently they descried people, naked, and the Admiral landed in the boat, which was armed, along with Martin Alonzo Pinzon, and Vincent Yanez his brother, captain of the Nina. . . . The Admiral called upon the two Captains, and the rest of the crew who landed, as also to Rodrigo de Escovedo notary of the fleet, and Rodrigo Sanchez, of Segovia, to bear witness that he before all others took possession (as in fact he did) of that island for the King and Queen his sovereigns, making the requisite declarations, which are more at large set down here in writing. Numbers of the people of the island straightway collected together. Here follow the precise words of the Admiral: "As I saw that they were very friendly to us, and perceived that they could be much more easily converted to our holy faith by gentle means than by force, I presented them with some red caps, and strings of beads to wear upon the neck, and many other trifles of small value, wherewith they were much delighted, and became wonderfully attached to us. Afterwards they came swimming to the boats, bringing parrots, balls of cotton thread, javelins, and many other things which they exchanged for articles we gave them, such as glass beads, and hawk's bells; which trade was carried on with the utmost good will. But they seemed on the whole to me, to be a very poor people. . . . Weapons they have none, nor are acquainted with them, for I showed them swords which they grasped by the blades, and cut themselves through ignorance. They have no iron, their javelins being without it, and nothing more than sticks, though some have fish-bones or other things at the ends. They are all of a good size and stature, and handsomely formed. I saw some with scars of wounds upon their bodies, and demanded by signs the of them; they answered me in the same way, that there came people from the other islands in the neighborhood who endeavored to make prisoners of them, and they defended themselves. I thought then, and still believe, that these were from the continent. It appears to me, that the people are ingenious, and would be good servants and I am of opinion that they would very readily become Christians, as they appear to have no religion. They very quickly learn such words as are spoken to them. If it please our Lord, I intend at my return to carry home six of them to your Highnesses, that they may learn our language." These are the words of the Admiral.
Explanation:
Naked,friendly, and very poor.
O domínio da metrópole portuguesa sobre sua colônia na América submeteu os colonos a condições impostas que, na maioria das vezes, oportunizaram apenas os interesses de Portugal. A exploração excessiva que era realizada por Portugal teve seus reflexos de descontentamento a partir do final do século XVII. Neste, ocorreu apenas um movimento de revolta, mas foi ao longo do século XVIII que os casos se multiplicaram. Entre os principais movimentos nativistas podemos destacar a Revolta dos Beckman, a Guerra dos Mascates, a Guerra dos Emboabas e a Revolta de Filipe dos Santos. Sobre essas revoltas, pesquise em diferentes fontes e preencha o quadro abaixo com as informações solicitadas.
Answer:
A Revolta dos Beckman de 1648 ocorreu no
Maranhão, seu motivo foi a foi a insatisfação
coletiva com a Companhia de Comércio do
Maranhão, que controlava os preços dos
produtos na região, prejudicando a todos os
maranhenses de São Luís, prejudicando os
agricultores locais.
Os irmãos Beckman, fazendeiros ingleses,
iniciaram uma revolta que conseguiu
atacar as instalações da CIA de Comércio
do Maranhão e a capital da Capitania,
apossando-se dos suprimentos. Porém a
Coroa Portuguesa logo enviou reforços que
prenderam os responsáveis, punindo-os.
A Guerra dos Mascates aconteceu em
1710 na província de Pernambuco, sendo
que mascates eram os comerciantes, que
confrontaram os senhores de engenho.
Pode-se dizer que houve uma vitória
simbólica dos mascates e a anistia dos
envolvidos pela coroa portuguesa.
Explanation:
hope it helps u
I need help on the crossing movie
1. How many Hessians were taken prisoner and how many Americans were killed or wounded at the Battle of Trenton?
2. How many months after the American Declaration of Independence was the Battle of Trenton fought?
3. In the Battle of Trenton, the Continentals outnumbered the Hessians almost 2 to 1. The Hessians were surprised and were poorly led. Why was this victory considered so important?
4. Where did the Hessians come from and why were they fighting for the British?
5. What would probably have happened to the American Revolution had Washington not crossed the Delaware and engaged the Hessians at Trenton at the end of December, 1776?
6. One of the memorable incidents shown in the film is Washington making a joke at the expense of General Knox, his commander of artillery. The novelist and screenwriter, Howard Fast, found a reference to this in the memoirs of some of the soldiers who were present. What role did Washington's joke play in his leadership at the Battle of Trenton?
7. Describe three actions other than cracking the joke about General Knox that Washington took which showed leadership at Trenton.
8. Washington was described as one of those rare few who, under fire, appeared to be without fear. Why is this important in a military leader?
9. After the battle, the character of General Greene asks the character of General Washington to speak with Colonel Rall before Rall dies. Washington replies: "Do you want me to weep for those b******, men who kill for profit?" General Greene responds that: "Our own cause at its heart is a fight against taxation, is it not? In the end, we all kill for profit, the British and the Hessians and us." Do you agree with the character of General Greene that the American Revolution was fought for money?
10. (Be honest; Don't deceive, cheat or steal; Be reliable -- do what you say you'll do; Have the courage to do the right thing; Build a good reputation; Be loyal -- stand by your family, friends and country) The Battle of Trenton shows the Continental troops demonstrating this Pillar. What did they do?
Answer:
did u actually type all this
dude u got time
just eat and sleep
Why is it useful for historians to craft historical narratives?
Hi,
Answer:
Why is it useful for historians to craft historical narratives?
- Narratives draw on ancient historical traditions rather than modern
ones.
the first battle of the revolutionary war?
What effect did the French and Indian War have on the British and their American colonies?
what is the nature of the problem that yields less than desirable results for all parties? undercover economist
Answer:
Explanation:The nature of these alternatives depends on the kind of choice problem that is being studied. In the theory of elections, the alternatives are people who might stand as candidates in an election. In welfare economics .....
Who was appointed to write the Declaration of Independence?
James Madison
Thomas Jefferson
John Locke
Thomas Paine
Mark this and retum
Save and Exit
Next
Submi
Answer:
Thomas Jefferson
Explanation:
"A committee of five delegates was appointed by the Second Continental Congress to write the Declaration of Independence on 11th June 1776.
The committee of five decided that Thomas Jefferson would write the first draft of the document."- History of My America Article
Hope this helps!
Answer: The answer is:
B: Thomas Jefferson
Explanation:
Edge 2023
Hope this h :}
Which is NOT a characteristic of an oral tradition?
A. To entertain an audience. B. To instigate war Between tribes.
C. To preserve a cultures history.
Answer:
to instigate a war between tribes
Explanation:
oral traditions teach younger generations history in an entertaining way
To Instigate war is not a characteristic of an oral tradition
Oral Tradition encompasses form of communications where information passed through different generations by word of mouth.
These tradition practice transmits knowledge, art, ideas and cultural material through oral means and are preserved by a generation and transferred to another.Information transferred includes the likes of proverbs, tales, legends and so on and are common among the African tribe.
In conclusion, Oral tradition are used to entertain and preserves a history but are never used to causes war, rather, they are passed to the next generations.
Learn more about Oral tradition here
brainly.com/question/18348643
People began to have a more personal and emotional religious experience, as well as questioning the authority of the church during the _______________
Mayflower
New Amsterdam
Great awakening
Bacon’s Bebellion
Answer: I believe it would be the Great Awakening
Explanation: The Great Awakening was a religious revival that impacted the English colonies in America during the 1730s and 1740s. The movement came at a time when the idea of secular rationalism was being emphasized, and passion for religion had grown stale. The result was a renewed dedication toward religion.
American settlers in the 1830's and 1840's began to look to Oregan and the far West for settlement because
Answer:
Por la compra de Luisiana y la Expedición de Lewis y Clark. Creyendo también que Estados Unidos era un refugio para la gente oprimida.
Explanation:
Pearl Harbor was caused by all of the following events EXCEPT:
A
Japan taking over China (Manchuria).
B
Japan's alliance with Germany.
С
The U.S. cutting off oil and scrap metal.
D
Japan's alliance with Russia
Japan's only chance was the element of surprise and to destroy America's navy as quickly as possible.
canten alguna historia de 5 párrafos pls no tengo nada es para un trabajo
Answer:
Libertad.
(En Cinco Parrafos)
Es una vida un casquillo de bala
talvez la misma que nos cuadra,
anterior al soplido seco de muerte.
Esa vida, la misma, una cabala
que con la suerte fuerte ladra,
para conseguir como no obtenerte.
Quiere como conquistarte sin medidas,
escondiendo amores pecaminosos,
como las teas de ocote prendidas.
Bailara a tus sones sobre los cosos,
y las brasas viejas pondrán confundidas
a los retoños de los ojos humosos.
Canta antes que la vida se acabe
canta con la suavidad de los sones
viene el final y todo se acerca
la libertad se ha conseguido con amor.
Explanation:
Ai là vua đầu tiên của vn
Answer:
chweg
Explanation:
What military role does the British DMoD have
Answer:
to protect and advance the UK and its interests by reinforcing the transatlantic defence and security relationship.
Explanation:
I hope this can help you let me know if its correct or incorrect
Una pregunta...... Que es lo que marca las diferentes etapas de la edad de los metales?
Answer:
Explanation:
for further info, go to azom . com
Write the process of the formation of District Co-ordination Committee.
Answer it fast plz
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How would you describe the narrator, Junior Polatkin?
(Choose all answers that apply)
Dynamic
Flat
Static
Round
Plsss helpp , marking brainliest as well
The order would be 7000 BC then 6000 BC, then AD 250 and finally AD 450.
Which of these Fair Deal reforms did not happer?
O A. A higher minimum wage
B. Providing more social security benefits
O c. Public housing for the poor
O D. A national health insurance program
Political Cartoon Analysis. Using you knowledge of
US History, interpret the meaning of the political
cartoon. Answer must be at least 3 complete
sentences.
LASTING FREEDOM, PEACE S PROSPERITY COME FROM ADHERINS TO THE LAWS OF NATURE
FEDERAL
STATE
COUNTY
LOCAL
We Be People
LAWS OF NATURE
Explanation:
peace is war
freedom is slavery
