how is time measured

Answers

Answer 1

Answer:

The measurement of time began with the invention of sundials in ancient Egypt some time prior to 1500 B.C. However, the time the Egyptians measured was not the same as the time today's clocks measure. For the Egyptians, and indeed for a further three millennia, the basic unit of time was the period of daylight.

Explanation:

Since 1967, the International System of Measurements bases its unit of time, the second, on the properties of caesium atoms. SI defines the second as 9,192,631,770 cycles of the radiation that corresponds to the transition between two electron spin energy levels of the ground state of the 133Cs atom.


Related Questions

What geographic feature formed the boundary to the western part of the United States before the Louisiana Purchase?

Answers

Answer: Mississippi River

Explanation:

The MOST LIKELY impact of the Columbian Exchange was the transfer of A) technology, religion, and slaves from Asia to Africa. B) livestock, disease, and sugarcane from Europe to Asia. C) diseases, ideas, and livestock from Europe to the Americas. D) technology, disease, and sugarcane from the Americas to Europe.

Answers

Answer:

C) diseases, ideas, and livestock from Europe to the Americas.

Explanation:

The Columbian Exchange was named after the very popular voyager and explorer, Christopher Columbus. Columbian Exchange is also referred to as the Columbian Interchange and typically involved the widespread movement of commodities, plants, technology, cultures, diseases, people and animals across West Africa, the Atlantic, America and the Old world (Europe, Asia, and Africa) as far back as in the 15th and 16th century.

The most likely impact of the Columbian Exchange was the transfer of diseases, ideas, and livestock from Europe to the Americas.

Some examples of the animals transferred from Europe to the Americas are goats, sheep, cattle, chickens, rats and pigs. The diseases transferred from Europe to the Americas, for which they had no immunity include typhoid, cholera measles, and smallpox.

Basically, the Columbian Exchange had a great impact on the people of America by significantly transforming their lives.

How did the “Massacre at Mystic” on May 26, 1637 forever change the United States?

Answers

Answer:

When English settlers arrived on the North American continent to start their lives anew, many of them gave little thought to the native peoples who had long inhabited these lands. The Puritan colonists who arrived in the Connecticut River Valley in the early 17th century quickly learned the benefits and necessities of trade and co-existence with the Pequot and other native groups. An initial period of accommodation and cultural mixing, however, turned bitter as the groups clashed over conflicting views of property, nature, division of labor, and the principles of warfare. Massacre at Mystic traces relations between these groups through the lens of a single day. On May 26, 1637 the English retaliated against the murder of one of their ownby viciously attacking a Pequot encampment. As this documentary explores this massacre, it captures the fateful consequences of these divergent worldviews and the tragic legacy left in its wake. Massacre at Mysticis a dramatic retelling of the development of Puritan and Pequot relationships.  Historians and Pequot descendents offer thoughtful commentary based on primary research and up-to-date historical interpretation. While there may have been a period of time in which Europeans and Native Americans could have built a cooperative society together, Massacre at Mysticuses this smaller story as a gripping example of why violence and force prevailed rather than co-existence. Rather than a simple tale of defeat, this program follows the present day Pequot as they have reconstructed a community based on new business enterprises and cultural endeavors. This program is an excellent historical lesson in understanding the development of the early colonies, the devastation of Native American peoples, and the patterns set during these formative years of contact.Curriculum Links:

Massacre at Mysticwould be an excellent addition to any middle school or high school class on American History, European History, World History, Environmental Studies, the History of Agriculture and Science and Technology.  It fulfills the following standards as outlined by the National Council for History Education: (1) Civilization, cultural diffusion, and innovation, (2) Conflict and cooperation, and (3) Human interaction with the environment

Explanation:

Answer:

The Massacre at Mystic is one of the most important events in the American History. It had set a new pattern in European/Native American relations in New England. After May 26, 1637 the colonists and native people would never became friends again. This day initiated the beginning of constant feud between them.

Hope this helps love! <3

Which of these new weapons was instrumental
in drawing the United States into World War 1?

poison gas

submarines

machines guns

aerial bombers

Answers

Answer:

B.) Submarines

Explanation:

Germany broke its promise to the United States to stop attacking passenger ships (unrestricted submarine warfare). German leaders knew America entering the war would increase the strength of Allied Powers.

I hope this helps you :)

Germany betrayed its promise to the United States by continuing to target civilian ships (unrestricted submarine warfare). German officials understood that America's entry into the war would strengthen the Allied Powers. As a result, option (B) is the true solution.

How did the US join World War II?

The United States had been on the outside of World War II for two years prior to the attack on Pearl Harbor in December 1941, which drew the country into the battle.

The start of WWI was less complicated than the start of WW2. The five-strong major European powers were swiftly drawn into hostilities after a 'big bang' outbreak in August 1914.

The United States' entry into World War I was likewise less complicated than the United States' entry into World War II. By 1917, there was little opposition to participating in the war. President Woodrow Wilson requested a declaration of war against Germany in April, partly in response to Berlin's doctrine of unrestricted submarine warfare (sinking commercial ships without warning).

Hence, option (B) is accurate.

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What course of action did the Iroquois Confederacy take in the conflict between the British and the French?

Answers

Answer:

They sided with the British

Explanation:

The conflict between the French and British was centered around who to control the Ohio Country. Given that Iroquois Confederacy had initially won the region by conquest, they claimed the ownership of the land.

Consequently, the British also claimed that Iroquois confederacy was under them, thus, Iroquois land belongs to them. Similarly, the French laid claim to the ownership of the land. This resulted in conflicts and eventually led to a war, which was known as the French - Indian war between 1754 - 1763. Hence during the war, considering the situation surrounding the land, the Iroquois sided with the British to fought the French.

Answer:

They remained neutral

Explanation:

McGraw Hill 2021

What was the slave code ? Please provide an explanation, using full sentences

Answers

Answer:

Slave code, in U.S. history, any of the set of rules based on the concept that enslaved persons were property, not persons.

Explanation:

The slave codes were laws relating to slavery and enslaved people, specifically regarding the Atlantic slave trade and chattel slavery in the Americas. Most slave codes were concerned with the rights and duties of free people in regards to enslaved people.

Answer:

Explanation:

Without protest, the slaves did not recognize their fate. Many incidents of Revolt, also in colonial times, were known to Americans. These uprisings have not been limited to the South. In fact, one of the first examples of a Revolt slave was in Manhattan in 1712. There was a justifiable fear on the part of the white colonists that a violent uprising might occur in one's own neighborhood as African Americans in the colonies grew greater and greater in number.

What are some of the reasons this is such a relatively large operation

Answers

Answer:

Human history, also known as world history, is the description of humanity's past. It is informed by archaeology, anthropology, genetics, linguistics, and other disciplines; and, for periods since the invention of writing, by recorded history and by secondary

Explanation:

The GDP is important because it is a measure of the economy’s overall economic


debt.

strength.

weakness.

performance.

Answers

Answer:

D. performance.

Explanation:

GDP known as gross domestic product, is the dollar value of all final output produced within the borders of the nation during a specific period of time. Under a nominal gross domestic product (GDP) calculation for an economy, the current dollar value of the finished goods and services within the country is used. Since it is a measure that uses the current dollar value, it also include changes in price due to inflation or an increase in price in the economy

The GDP is important because it is a measure of the economy’s overall economic performance.

Answer:

The GDP is important because it is a measure of the economy's overall economic PeRfOrMaNcE.

Explanation:


Why was the Supreme Court's ruling in Brown v. Board of Education
a major victory for the civil rights movement?
A. It ensured that African American students would receive a quality education in
schools with the same quality as those provided for white students.
B. It rejected the doctrine of "separate but equal" and declared that public schools could
not be segregated on the basis of race.
C. It ordered local governments to bus children to schools outside their neighborhoods
to achieve greater racial integration.
D.It upheld the doctrine established by the 1896 Supreme Court case Plessy v.
Ferguson that permitted laws segregating African Americans .

Answers

Answer:

B

Explanation:

Because it was the greatest impact and it talked about the segregation about that time.

B. It was also important in leading up to civil rights act of 1965. Even with the ruling integrating schools was very difficult and received a lot of pushback (see LittleRock Nine) but results were very positive (see Rucker Johnson study on school integration)

What safeguards are in place to ensure that the wealthy
and the poor are equally impacted by this legislation?
Check all that apply.
People cannot furnish a substitute.
People cannot pay for their release,
People cannot receive a bounty to enlist
People cannot make money while enlisted,
People cannot serve more than one term of service,

Answers

Answer:

a,b,c

Explanation:

got it right  trust me

Answer:

Its A.B.C

Explanation:

They got it right.

One of the main roles of police during the 19th century was "strike-breaking." Why did the police engage in these actions and who benefitted from these actions?

Answers

Answer:

The police engaged in strike-breaking because in the 19th century, labor unions were starting to emerge, and they had a low reputation among the political ruling class and the economic elite. This is because labor unions represented and obstacle to their profits.

Those who benefited were mainly the economic elite who owned the enterprises. These owners did not want to meet the demands of the labor unions, like an 8 hour work-day, simply because these demands represented a reduction in profits.

What contributions or changes did the Greeks make towards advancing our practice of Governing?

Answers

Answer:

Greeks created the first forms of democratic governments, which led to division of power, but also of larger influence of people in the decision making. The best example for this is Athens, that brought many laws and also created many democratic institutions.

Explanation:

In Ancient Greece there were different forms of government in city-states, but in some of them, to be concrete in Athens, we have the creation of a system that preceded today's democracy. In general, there were institutions, such as ecclesia in which adult citizens had the possibility to participate in the process of decision making.

How did the Second Great Awakening influence American society?
a. The movement deemphasized self-control.
b. It led to women's suffrage by the time of the Civil War.
c. The movement led to most immigrants becoming Methodist and Baptist.
d. The religious aspect led to alcohol being banned in the United States.
e. It inspired some to combat the sins of society, such as alcoholism.

Answers

Answer:

e

it is right i tested it on plato

The sentiment in this speech contributed to what difference between the New England and Southern colonies ?
A. England colonies did not allow any form of slavery or indentured servitude

Answers

Answer:

Slavery is less in New England as compared to other Southern colonies.

Explanation:

There is a difference between the New England and Southern colonies on the slavery because Southern colonies had a very high demand of slaves due to large plantation while on the other hand, the New England have less requirement of labour due to less plantation so there is less slavery exists in the New England as compared to other Southern colonies.

Which was one similarly between the Middle Colonies and the New England Colonies?

Answers

Answer:

they both traded in fur and iron and had their own self government but in new england only male church members could vote

Spanish settlers tended to build towns

Answers

Answer:

Yes Very Ture

Explanation:

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100% true no question

Why did Buddhism spread throughout India during the rule of the Mauryan
Empire?

Answers

Answer: The emperor Ashoka the Great encouraged all Indians to practice Buddhism

Explanation: I just took the test and this was the correct answer

Read the statement. The legislative branch is known as the “_[blank]_ Branch” of the federal government. Which best completes the sentence?
Citizens’
Your
People’s
Americans’

Answers

Answer: People’s

Explanation: it is the branch on which the citizens of the U.S. have the greatest impact and influence :)

The Pax Romana was the period of peace enjoyed by Romans under the rule of
a. Vespasian
c. Augustus
b. Marcus Aurelius
d. Hadrian
Please select the best answer from the choices provided
B.
Ο Ο Ο Ο
с

Answers

The answer is c if wrong sorry

Answer:

c

Explanation:hope it helps

Part A: Short-Answer Questions
Directions: Analyze the documents and answer the short-answer questions that follow
each document in the space provided.
Document 1
1a. What method of transportation is shown in the cartoon?
b. What were two advantages of shipping products this way?

Answers

Answer:

b

Explanation:

because of the gravity of the world under the sea

We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable rights, that among these are Life, Liberty, and the pursuit of Happiness. That to secure these rights, governments are instituted among men, deriving their just powers from the consent of the governed, that whenever any form of government becomes destructive of these ends, it is the right of the people to alter or to abolish it, and to institute new government, laying its foundation on such principles and organizing its powers in such form, as to them shall seem most likely to effect their Safety and Happiness.

—American Declaration of Independence, 1776

Which of these Enlightenment ideas is found in the passage from the Declaration of Independence?
A:Democratic elections represents people
B:Goverments need Check and Balances
C.People are born with natural right
D.Reason is the best way to find truth

Answers

Answer:

C. People are born with natural right

Explanation:


The region that contains the Kamchatka Peninsula is the
A Ural Mountains
B. Western Siberian Plain
C Central Siberian Plateau
D. Eastern Siberian Highlands

Answers

Answer:

It’s D.

Explanation:

Your Welcome!

Answer:

on edg the answer is C

Explanation:

just tell me if i am wrong

have a good day or night

In your opinion, do life appointments of Supreme Court judges affect the way the Supreme Court works? Support your answer. Please help!

Answers

Yes the life appointments of Supreme Court judges affect the way the court works because their are opinions are going to be biased like every human on earth.

Item 3
Which words best describe Dr. Mesmer?

A.humble, kind, and wise

B.simple, plain, and direct

C.fast, daring, and strong

D.elegant, fancy, and mysterious

Answers

The set of words which describes Dr. Mesmer the best is: elegant, fancy, and mysterious. Thus, option 'D' is correct.

Who was Dr. Mesmer?

German physician Franz Anton Mesmer has a passion for astronomy. He proposed the presence of a natural energy exchange that takes place between all living things and inanimate objects. He named this "animal magnetism," which has since occasionally been referred to as mesmerism.

Dr. Mesmer becomes famous by persuading patients that his force has helped them feel better. His methods only work if patients believe anything would happen. The patients were encouraged to believe in a force by Dr. Mesmer, and this expectation of improvement helped them feel better.

Mesmer saw good health as the unhindered movement of life through the many channels that comprise our body. Obstacles to this flow led to illness. Therefore, option 'D' (elegant, fancy, and mysterious) is the correct option.

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please help !!!!!!! :))

Answers

Answer:

1:B

2:A

3:C

Explanation:

the definition  of society is "an organization or club formed for a particular purpose or activity."

The Fourth Amendment states that a reasonable search and seizure must

include a warrant and be based on an indictment.

include a warrant and be based on probable cause.

be based on probable cause and include due process.

be based on probable cause and include a Miranda warning.

Answers

Answer:

include a warrant and be based on probable cause.

Explanation:

The fourth Amendment was created to prevent the abuse of power from the police department. Before the fourth amendment was created, the police had the right to conduct a search to citizens' home at any given time and place. This leaves a lot of opportunities for them to plant evidence and disrupt the right of privacy.

After the amendment, Police can no longer do that. In order to search a private property, they need to gain a warrant (which is basically a permit given by the court) or maybe the have a strong basis to believe that a citizen is in danger. (For example, if police heard a gun shot from a private property, that police can conduct a search without a warrant)

Answer:

B

Explanation:

ON EDGE

Hurry pls I will give you the brainliest. What advantages did Nubia's location provide? Choose four correct answers.
good weather for farming
location next to the ocean
many natural resources
strong defenses from invaders
access to different trade routes
location on a calm area of the Nile

Answers

The answers are A,C,D,E

Explanation:

Help me please thank you.

Answers

Answer:

1. They helped feed people who lived in poverty.

2. They cared for sick villagers.

3. They educated people.

How did American business add to the decline the Mexican government?

A. U.S. business interests overthrew the government in order to control prices.

B. U.S. business interests supported the workers in their fight against the government.

C. U.S. business interests caused unrest because of unfair economic practices.

D. U.S. business interests paid Pancho Villa to attack their rivals. ​

Answers

Answer:

C. U.S business interests caused unrest because of unfair economic practices.

The correct option is C.

What factors contribute to civil unrest?

Political grievances (including opposition to tyrannical governments), economic disputes, and long-standing oppression have all caused civil unrest in America. The economic and social causes of civil unrest aren't mutually exclusive.

What is economic unrest?

Any actions were taken by one nation or group of nations to harm the economy of another nation or group, often to force a political change.

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What do you think are some of the challenges facing those restoring the Hagia Sophia?

Answers

The correct answer to this open question is the following.

Although there are no options attached or further references, we can comment on the following.

I think some of the challenges facing those restoring the Hagia Sophia church in Turkey are the following.

First, the budget needed to continually restorative the impressive building. Next, the qualified persons to do it. They need specialists in engineering and art to do the kind of conservation needed.

For a monumental structure like Haga Sophia, it is required to have a high budget to do permanent maintenance works as a preventive measure, as well as to correct the problems caused by the pass of time such as erosion, cracks in the walls, humidity.

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In the laboratory you dissolve 18.7 g of copper(II) bromide in a volumetric flask and add water to a total volume of 375mL. Required:a. What is the molarity of the solution?b. What is the concentration of the copper(II) cation?c. What is the concentration of the acetate anion? A rectangular table top needs to be divided into six equal sections. Suppose that you are only able to determine the halfway mark between any interval. Explain how you would use these benchmarks to estimate 1/6 of the length of the table top. Many young boys are____with superheros a infatuated b rapt c negotiable d degraded e translucent f reprehensible If b = 3, then b ^-2 is equivalent to ... please help fast lol Im in a test Is this a function or not a function? (Picture) A music player app has 2 gigabytes of storage and can hold about 500 songs. A similar, but larger app has 80gigabytes of storage. About how many songs can the larger app hold? Read the statement. The legislative branch is known as the _[blank]_ Branch of the federal government. Which best completes the sentence?CitizensYourPeoplesAmericans What is the most highly populated rotational level of Cl2 (i) 25deg C and (ii) 100 deg C? Take B=0.244cm-1.This question should not be resubmitted, it is a textbook question from the Atkins physical chemistry txtbook. 10 e. anty: Word problems LLVQuestionsansweredYou have prizes to reveall Go to your game board. XOakland is hosting a city-wide arts festival at which vendors can pay to have a small booth ora large booth. The fee for a small booth is $31, whereas the fee for a large booth is $87. Thecity hopes to receive at least $2,300 in fees.Select the inequality in standard form that describes this situation. Use the given numbersand the following variables.10Timeelapsedx = the number of small booths2600 12HRINy = the number of large boothsSmartScoreout of 10031 + x + 87 + y 2 2,3005087x + 31y 2 2,30031x + 87y 2 2,30087 + x + 31 + y 2 2,300Sign out A Mercator projection map shows accurate The main reason Thomas Paine published Common Sense was to persuade Britain that it could not govern the colonies well. let foreign countries know that the colonies were ready to fight Britain. persuade colonists that the colonies should become independent. force Southern colonies to support Northern ones in the coming war. Based on your understanding, which fact is accurate?Despite his devotion to communism, Leon Trotsky was forced out of his political party and later assassinated, as ordered by the leader of the party.Despite his impiety to communism, Leon Trotsky was forced out of his political party and later assassinated, as ordered by the leader of the party.Despite his devotion to communism, Leon Trotsky was forced out of his political party and later congratulated as ordered by the leader of the party.Despite his devotion to communism, Leon Trotsky was remained with his political party and later assassinated, as ordered by the leader of the party. 12. ROSCALCULATE THE ARCLENGTH. ROUND TO THENEAREST TENTH.18063 11IQS Why did Buddhism spread throughout India during the rule of the MauryanEmpire? 4(3x + 1)What is the answer to 4(3x + 1) In your opinion, do life appointments of Supreme Court judges affect the way the Supreme Court works? Support your answer. Please help! 3. Which of the following is not proper in cleaning a stainless steelkitchen surface?A. Use a non-abrasive multi-surface cleanerB. Do not use any abrasive cream cleaners.C. Wash with a solution of washing up liquid and dry with a softclothD. To remove fingers marks, put a dab of baby oil or rinse aid on aclean cloth and rub the whole surface. Can you read this?? Dndkfrjjdfjjd The decimal reduction time (DRT) to kill 90% of cell present for autoclaving a culture is 1.5 minutes. How long would it take to kill all the cells if 106 cells were present? What would happen if you stopped the heating process at 9 minutes? Lady Bird Johnson is responsible for which activity when her husbandwas Governor of Texas