who invented bifocal glasses

Answers

Answer 1

History of bifocals and trifocals

Benjamin Franklin, the early American statesman and inventor, is credited with creating the first multifocal lens for eyeglasses. Prior to Franklin's invention, anyone with presbyopia had to carry two pairs of eyeglasses — one for seeing distant objects and one for seeing up close.


Related Questions

W9-Try It 1: Incorporation/Federalism
POSSIBLE POINT
Of the amendments incorporated by the Supreme Court, which two amendments have yet to be incorporated?
2nd and 9th
2nd and 3rd
3rd and 7th
7th and 9th

Answers

Answer:

3rd and 7th

Explanation:

Incorporation of amendments deals basically with the Constitutional doctrine, in which the first ten amendments otherwise known as Bill of Rights, has it's application extended beyond the federal government alone, but to state and local government under the Due Process clause of the Fourteenth Amendment.

However, not all the first ten amendments has been incorporated. Some have been incorporated fully, while some are partially incorporated, and the rest are yet to be incorporated at all.

The amendment that have been incorporated includes:

1. First amendment:

2. Second Amendment

3. Fourth Amendment

4. Eight Amendment

Those partially incorporated are:

1. Fifth Amendment

2. Sixth Amendment

The Amendment yet to be incorporated by the supreme Court are:

1. Third Amendment:

2. Seventh Amendment

Hence, of the amendments incorporated by the Supreme Court, the two amendments that have yet to be incorporated are 3rd and 7th

Constantine moved the Roman capital from Rome to this city in the eastern part of the empire, which he renamed Constantinople. a. Byzantium c. Sicily b. Carthage d. Alexandria Please select the best answer from the choices provided

Answers

Answer:

a. Byzantium

Explanation:

The city of Constantinople was established in what was previously known as Byzantium (and is now Istanbul). Byzantium became the capital of the Eastern Roman Empire in 324, becoming Constantinople in 330, named after Emperor Constantine. Constantinople was the largest and wealthiest city in Europe for much of its history, and it exerted a powerful influence on European life and culture for over a hundred years. The city was also instrumental in the development and advancement of Christianity.

Answer:

a

Explanation:

Why do you need to watch crane fly larvae carefully

Answers

Answer:

Crane fly larvae needs to be watched carefully because they appear very similar to the mosquitoes and the in the larval stage they feed on the dead and decomposed matter in the water.

They do not bite human beings and even when they become adult they do not harm human beings.

They feed only at the larval stage. Most of the time these crane flies are confused with the larvae of mosquitoes because they appear similar.

They need to be watched carefully because they only appear like mosquitoes but they can grow and become bigger than them.


Put the following investment options in order of least to greatest risk:
starting a business
B-rated bond
speculative stock
property

Answers

Answer:

Starting a businessB- rated bondPropertySpeculative stock

Explanation:

Investment or starting a business is to look like a mountain of the task. But the money, time, placer, partnership all depends on the option you choose for business.

There are many options to start a business or to invest in the business. The low investment in business leads to a great idea for people.

There is some investment plan here that can help a person to start a business.

The partner with the drop-shipperTo launch your bookTo start the charitable business.To sell the servicesTo sell handmade goods.

What did the US call their new defensive empire?

Answers

Answer:

United States call its empire a defensive one because it was portrayed as a justification to counter communism.

Explanation:

The United States imperialism was different from the European ones in many aspects. The U.S has timely justified its intervention in other countries. It considered the Western Hemisphere its jurisdiction, which should be ruled according to the American ideal of capitalism and democracy. They portrayed communism as an attack on American ideals and used imperialism as a weapon to fight against it.

What organization provides loans to poor countries but requires they open up to free trade type policies?
A. International Monetary Fund
B. International Trade Organization
C. International Bank

Answers

Answer:

The answer is A. International Monetary Fund

Explanation:

The International Monetary Fund (IMF) is an international organization of 189 member countries that works to ensure the stability of the international monetary and financial system.

John Marin painted modern art influenced by New York City.
True
False

Answers

Answer:

the answer is false (F)

Explanation:

Which men testified against Nixon during the Watergate hearings?
A.Alexander Butterfield and Carl Bernstein
B.Bob Woodward and John Dean
C. John Dean and Alexander Butterfield
D. John Dean and Archibald Cox
hurryy plz

Answers

Answer:

C

Explanation:

John Dean and Alexander Butterfield

John Dean and Alexander Butterfield testified against Nixon during the Watergate hearings. Hence, option C is appropriate.

Who was Nixon?

From 1969 to 1974, Richard Milhous Nixon presided as the 37th president of the United States. He was a Republican who had previously represented and represented California in the Senate. From 1953 to 1961, he served as President Dwight D. Eisenhower's 36th vice president.

During his five years in office, the United States' involvement in the Vietnam War was reduced, relations with the Soviet Union and China were normalized, the first manned Moon landings took place, and the Environmental Protection Agency, as well as Building And safety, were established.

Nixon reportedly announced his resignation in his address by saying, "I have concluded that, as a result of the Watergate scandal, I may not receive the support of a Congress that I'd deem necessary.

Hence, option C is correct.

Learn more about Nixon here:

https://brainly.com/question/5030621

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Which identifies the main cause of the English Civil War?

Answers

Answer:

The main cause of the English Civil War in 1642 was the never-ending argument between King Charles X and the Parliament. King Charles was bold and obnoxious and stuck-up which eventually lead to his death. Both parties had their own ways of thinking/basic truths/rules about religion and money. During the heat of discussions, King Charles never listened and made decisions all by himself, which seemed like he was ruling out the powers of Parliament.

This crack (or argument) between the King and the Parliament resulted to a war that divided the country. King Charles X's famous enemy in government was Oliver Cromwell, one of the people who signed his death warrant in the year 1649.

The cause of the English Civil War was the power struggle between King and Parliament.

The English Civil War began in the 17th century.The main issue between the King and Parliament was money. The King required money to run the country, but Parliament controlled the taxes.In 1641, the new Parliament passed laws without the King's authority which raged him and tried to capture a few MPs, but failed.After the attempted arrest, Parliament raised their army. Charles also gathered his, which led to the beginning of the English Civil War in 1642.

Therefore we can conclude that the war was an internal strife in England between the Crown and Parliament.

Learn more about "the English Civil War" here:

brainly.com/question/13410187

Each of the 4 Deserts races poses unique challenges. What are the challenges posed by the Atacama Desert and the Sahara Desert

Answers

According to a different source, this question refers to the text "Desert Racing."

The 4 Deserts Ultramarathon Series is a series of races that take place in four different deserts around the world. These include the Gobi Desert (western China), the Atacama Desert (Chile), the Sahara Desert (Egypt) and Antartica.

This text explains the particular difficulties that each race presents. The Atacama Desert, for example, is the driest hot desert in the world. The race in this desert starts high up, at 3,000 meters, and takes runners on several ascents and descents. Moreover, runners face loose rocky terrain.

On the other hand, the main challenge of the Sahara Desert is the fact that this is the world's hottest desert. Moreover, this desert has sand dunes that can reach 590 feet high. The main challenges of this desert are staying hydrated and battling exhaustion.

William Shakespeare’s plays contributed to Renaissance culture by

Answers

Answer:

creating complex characters

Explanation:

Answer: C (Creating complex Characters)

Explanation:

EDGE

What are some advantages on urban?

Please answer in point form!

Thank you

Answers

Answer:

Explanation:

There are often roads of a better quality and well-built houses in urban areas.There are a greater number of jobs available in urban areas. Starting a new career could be far easier if you move to a town or city.Hospitals and clinics are close by for easy access to healthcare or aid in an emergency.

what does escalation mean during the Vietnam war

Answers

Answer:

Escalation during wartime is usually refering to the rise in combat and causualities

Explanation:

During the Vietnam war, escalation mainly refers to when the US went boots on the ground full force in 1965. Johnson having just been reelected turned is main focus to the vietnam conflict. He would drop over 500,000 tons of explosives on North Vietnam, quickly raising the death toll many of which were civilians. Combat boots hit later that year, over 35,000 troops were deployed.


Based on the map, which geographic feature was most necessary to early civilizations?
rivers
forests
ew
mountains
coasts

Answers

Rivers were the most necessary. This was the most necessary to transport goods and get places faster because planes did not exist then. Also look at the map

A study claims that all adults spend an average of 14 hours or more on chores during a weekend. A researcher wanted to check if this claim is true. A random sample of 200 adults taken by this researcher showed that these adults spend an average of 14.65 hours on chores during a weekend. The population standard deviation is known to be 3.0 hours.


a. Find the p-value for the hypothesis test with the alternative hypothesis that all adults spend more than 14 hours on chores during a weekend. Will you reject the null hypothesis at α = .05? b. Test the hypothesis of part a using the critical-value approach at α = .05.

Answers

Answer:

a) The null and alternative hypotheses:

H0 : u ≤ 14

H1 : u > 14

This is a right tailed test.

Let's find test statistics, z

[tex] Z = \frac{x' - u}{\sigma / \sqrt{n}}[/tex]

[tex] Z = \frac{14.65 - 14}{3/ \sqrt{200}} = 3.0641 [/tex]

P-value:

Using the standard normal table, NORMSDIST(3.0641) = 0.99889

P(Z>3.0641) = 1 - 0.99889

P(Z>3.0641) = 0.00111

Pvalue = 0.00111

At a significance level of 0.05.

Since pvalue, 0.00111 is less than significance level, 0.05, we reject null hypothesis, H0.

b) Test the hypothesis of part a using the critical-value approach at α = .05

At α = 0.05, (1 - 0.05) = 0.95

Using the standard normal table, the critical value at 0.95 is 1.65.

Reject null hypothesis H0, since Zstat 3.0641 is greater than Zcritical, 1.65.

Suppose you work for the government in 1944 and need a new recruitment poster made which agency would you approach

Answers

Answer:

The answer is the Office of War Information

Explanation:

The Office of War Information was the source of war propaganda in the US during this period of time.

The office was formed during the second world war. It's goal was the provision of propaganda material to people so as to greater support from them. The office had radio broadcasts, organized public meetings, printed various posters, pamphlets, books, and any other material that could get people in support of the cause.

Answer:

The answer is the Office of War Information

Explanation:

got it right on test

What led to the Montgomery Bus Boycott? Was the boycott successful?

Answers

What led to the boycott was the issue with Rosa parks not giving up her seat. Yes the boycott ended successfully.

On December 1, 1955, Rosa Parks, a black seamstress, was arrested in Montgomery, Alabama for refusing to give up her bus seat so that white passengers could sit in it. ... Following a November 1956 ruling by the Supreme Court that segregation on public buses was unconstitutional, the bus boycott ended successfully.

Alaska king crab fishing in the 1960s and 70s was a dangerous but rich fishery. boats from as far away as california and japan braved the treacherous gulf of alaska crossing to reach the abundant king crab beds in cook inlet and bristol bay. suddenly, in the early 1980s the fishery crashed due to over fishing. all crabbing in those areas ended. to this day, there is no crabbing in bristol bay or cook inlet.

a. how would an economist explain the decline of the alaska king crab fishery?

b. explain two programs you could institute to protect the fishery and still allow some crabbing again.

c. canadians have been very successful in farming salmon in coastal fiords along the coast of british columbia. why have they been successful with salmon when the crab fishery crashed?

Answers

Answer:

a. how would an economist explain the decline of the alaska king crab fishery?

According to economist, the decline of the Alaska king crab fishery could be compared to Law of diminshing returns. This simply means that, the optimal fishing point was reached before the fishes available started declining leading to the fishing bust that happened in 1980s.

b. explain two programs you could institute to protect the fishery and still allow some crabbing again.

Fishing Time policy: This program would involve the restriction of the fishing activities carried out in the alaska to a given time frame. For example, from september to december. Rather than fishing always as was done.

Fishing Quantity Policy: This program would in involve the restriction of the quantity of fishes to be gotten in the cook inlet and bristol bay by the fishing companies. For example, each company is expected to take only 50kg worth of fish once a week rather than fishing unlimitedly each day.

c. canadians have been very successful in farming salmon in coastal fiords along the coast of british columbia. why have they been successful with salmon when the crab fishery crashed?

This is because, their are series of policies that tends to guide the farming of salmon in the coastal fiords by the Canadians. And, also, salmon is not as demanding as the King Crab fishes.

Explanation:

The U.S. military was targeted by Joe
McCarthy for what reason following
WWII?

Answers

It’s B, he accused the us military of “being too soft on communism”

What happened to people who were ostracized in Ancient Greece

Answers

Answer:

they were given names and placed in urns. (more info below)

Explanation:

citizens gave the names of those they wished to be ostracized to the scribe, as many of them were illiterate, and then scratched their names on pottery shards, and placed them in urns.

hope I helped!

answer: They were removed from the polis for 10 years.

The president can quickly direct the agencies of the exclusive branch to respond to economic ,social, or political needs by

Answers

Answer:

The president can quickly direct the agencies of the exclusive branch to respond to economic, social, or political needs by  signing executive orders.

Explanation:

Executive orders are decrees signed by the President of the United States, which serve to immediately legislate issues that have been granted to the presidential powers set forth in Article II of the United States Constitution. Even the President can issue executive orders on issues not authorized by the Constitution, in which case they must be approved by Congress. In all cases and like federal laws, its content can be reviewed by the Supreme Court.

Their usefulness is explained by the immediacy with which said executive orders come into force, since they do not need prior congressional debate. Therefore, many times, for reasons of necessity and practicality, presidents dictate this type of legislation.

Why is the slide on the right a better choice for a multimedia presentation? Check all that apply.


Answers

The correct answer to this open question is the following.

Unfortunately, the question does not provide any options to chose from and does not include the slides.

However, if the options would be the following, we can answer the question.

Options:

A) It has a picture to hold the audience’s attention.

B) It does not cite distracting, unnecessary sources.

C) It will not distract from the speaker if the text is read.

D) It has a bulleted list that is easy to read.

E) It has a much more interesting title.

So the correct answer would be A) It has a picture to hold the audience’s attention and D) It has a bulleted list that is easy to read.

In the slides of the question, we can see one of them full of text. It refers to Mahatma Gandhi. The other side includes a photograph of Gandhi and a bulleted list that makes it is easy to read.

That is why it is important to include pictures, photographs, diagrams, or other kinds of illustration in a multimedia presentation, to grab's people attention from the beginning and not making it so boring.

Answer:

A,C,D,E

Explanation:

Explain Reagan’s relationship with military spending? Who were some names considered to be NEOCONSERVATIVES?

Answers

Answer:

Explanation:

regan's economic ideas were known as reganomics. This was a promise to drop taxes, increase capitol gains, decrease bussiness regulations, and expand the money supply. This lead to Large Tax cuts and stagflation.  

The answer is The Regan Doctrain. This doctain renewed the opposition of communism by supporting U.S. friendly countries.  He also believed the U.S. should have the strongest military in the world.

* Answer to first question

P.S. hope this helps you out.

 

How would an absolute monarch deal with protesters

Answers

Answer:

George floyd

Explanation:

he died and it's a big deal to some people. :/

// have a great day //

To petition the government means to __________. A. have rights B. make a request C. get a list of signatures D. vote for different officials

Answers

The answer is C.) get a list of signatures

What was the effect of President Roosevelt's attempt to balance the federal budget?
economic recession

end of the Great Depression

President Roosevelt losing the 1936 election

economic depression

Answers

Answer:

The effect of President Roosevelt's attempt to balance the federal budget was the economic recession of 1937.

Explanation:

In 1937, the government of the Democrat Franklin D. Roosevelt considered that, after 4 years of effort, the government should reduce its fiscal deficit and balance its accounts in order to avoid a progressive emptying of the public coffers. Roosevelt, who had won in the 1933 elections and had imposed the New Deal, greatly increasing public spending in line with Keynesian theory, decided it was time for the government to start pulling out of the economy. Thus, he decided to cut expenses (closing New Deal programs) and raise taxes, in order to balance the fiscal deficit.

The problem was that, as a consequence of the Great Depression and the correct application of the New Deal, the American economy was too weak not to have the support of the federal state. In other words, the American economy depended heavily on New Deal programs, and it had a degree of fiscal effort that was too great to raise taxes. Thus, with the taking of these measures, the American economy began to fall, entering in a recession.

The famous meeting between President Carter, Sadat, and Begin took place at

Answers

Answer:

THEY MET AT CAMP DAVID

Explanation:

THEY MET AT CAMP DAVID FROM  from September 5 through September 17, 1978

Answer:

camp david !

Explanation:

Which groups are affected most by globalization? Select three options,

businesses

churches

consumers

economies

schools

Answers

Answer: A- Businesses C- Consumers D- Economies

Explanation: 100% sure just took the unit test review on edge

Answer:

businesses

consumers

economies

Explanation:

A C D

Which of the following called upon states to desegregate public schools “with all deliberate speed”

Answers

Answer:

The Brown Decision

Explanation:

Brown v. Board of Education - Supreme Court Case 1954

The decision called for all schools to desegregate public schools "with all deliberate speed".

Answer: C, Brown II

Explanation:

Just took the test

What was the style of American blues developed

Answers

Answer:

early 20th century

Explanation:

The style of American blues was developed in the early 20th century. Correct answer: D Blues is a music genre created by African Americans in the early 20th century, originally in the South. The name blues comes for "the blue devils,” which denoted intense visual hallucinations that can accompany severe alcohol withdrawal. Over time it was shortened to  “the blues,”.

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The number one is an example of an element in the set of natural numbers true or false What does pi equal??WILL GIVE BRAINLIEST!!!!!!!!:) ms kazenas has 4 pounds of cake mix which she discovers is only 25 of the cake mix she needs to make a whole cake how many more pounds of cake mix does ms kazenas need Which of these os true? (A)light travels in a straight line.(B)light travels in a random manner. (C) parallel beams are divergent in nature.(D)parallel beams are convergent in nature.(E)non of the above a ferris wheel with a 40-ft diameter rotates once every 30 seconds. the bottom of the wheel is located 1.5 feet above the ground. you get on at the very bottom of the ferris wheel at time t = 0 and then the ferris wheel begins to turn counter-clockwise. for the problems below, assume the wheel makes 2 full rotations.a. at what times are you at the top of the ferris wheel? what is the height at the top of the ferris wheel?b. at what times are you at the bottom of the ferris wheel? what is the height at the bottom of the ferris wheel?c. at what times are you in the exact middle of the ferris wheel? what is the height of the exact middle of the ferris wheel?d. write a cosine function to model your height above the ground over time, t. The hexagon has all sides the same length and opposite sides are parallel, but is not a rhombus. Why?! Which of the following is an inference? describe how personal health is influenced by many different factors What would be the first thing you would do if your clothes caught fire while working in a laboratory?O A. Call out to your teacherOB. Drop and roll on the floor to extinguish the fireO c.Run towards a source of water to extinguish the fireResetNext Cards for Candy Two ladies played cards for candy; the winner received one piece per game from the loser. When it was time for one of the ladies to go home, one lady had won three games, while the other lady had a profit of three pieces of candy. How many individual games had they played? What was one major effect of urbanization on British citizens lives during the industrial revolution Over the course of the story, Mercis view of her dad changes because Which expression represents the composition [g o f o h](x) for the functions below?f(x) = 5x 4g(x) = 5x3h(x) = 3x Pope Leo III crowned Charlemagne as Holy Roman emperor. What did this indicate about the Catholic Church? A. The Church wanted to give up its power to the emperor. B. The Church had more faith in Charlemagne than in Pope Leo III. C. The Church wanted to share power with the emperor. D. The Church helped Charlemagne conquer much of Europe. Whats the correct answer for this? According to the map, which statement is correct?The population of southern Europe is growing faster than that of northern Europe.The average age of the population in Western Europe is higher than in Eastern Europe.Nations that are historically younger also tend to have younger populations.Immigration has lowered the age of the populations of some European nations. Please answer correctly !!!!!! Will mark brainliest !!!!!!!!!! No explanation needed !!! The Emancipation Proclamation was an executive order issued by Abraham Lincoln on January 1, 1863. It proclaimed The freedom of slaves in eleven Confederate states still in rebellion. The height of a ball above the ground as a function of time is given by the function h(t)= -32t^2+8t+3 where h is the height of the ball in feet and t is the time in seconds. When is the ball at a maximum height Why intermediate elements has negative packing fraction?