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geniusboy [140]
3 years ago
7

Select all the space shuttles O Sputnik O Explorer O Endeavour O Atlantis

History
2 answers:
denis23 [38]3 years ago
7 0

Answer:

Explorer Endeavour Atlantis

Explanation:sputnik was a satellite launched by the russians

mylen [45]3 years ago
5 0

Answer:

The Space Shuttle was a partially reusable low Earth orbital spacecraft system that was operated from 1981 to 2011 by the National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. Its official program name was Space Transportation System (STS), taken from a 1969 plan for a system of reusable spacecraft of which it was the only item funded for development.[10] The first of four orbital test flights occurred in 1981, leading to operational flights beginning in 1982. Five complete Space Shuttle orbiter vehicles were built and flown on a total of 135 missions from 1981 to 2011, launched from the Kennedy Space Center (KSC) in Florida. Operational missions launched numerous satellites, interplanetary probes, and the Hubble Space Telescope (HST); conducted science experiments in orbit; and participated in construction and servicing of the International Space Station. The Shuttle fleet's total mission time was 1322 days, 19 hours, 21 minutes and 23 seconds.[11]

Shuttle components include the Orbiter Vehicle (OV) with three clustered Rocketdyne RS-25 main engines, a pair of recoverable solid rocket boosters (SRBs), and the expendable external tank (ET) containing liquid hydrogen and liquid oxygen. The Space Shuttle was launched vertically, like a conventional rocket, with the two SRBs operating in parallel with the OV's three main engines, which were fueled from the ET. The SRBs were jettisoned before the vehicle reached orbit, and the ET was jettisoned just before orbit insertion, which used the orbiter's two Orbital Maneuvering System (OMS) engines. At the conclusion of the mission, the orbiter fired its OMS to deorbit and reenter the atmosphere. The orbiter then glided as a spaceplane to a runway landing, usually to the Shuttle Landing Facility at KSC, Florida or Rogers Dry Lake in Edwards Air Force Base, California. After landing at Edwards, the orbiter was flown back to the KSC on the Shuttle Carrier Aircraft, a specially modified Boeing 747.

The first orbiter, Enterprise, was built in 1976, used in Approach and Landing Tests and has no orbital capability. Four fully operational orbiters were initially built: Columbia, Challenger, Discovery, and Atlantis. Of these, two were lost in mission accidents: Challenger in 1986 and Columbia in 2003, with a total of fourteen astronauts killed. A fifth operational (and sixth in total) orbiter, Endeavour, was built in 1991 to replace Challenger. The Space Shuttle was retired from service upon the conclusion of Atlantis's final flight on July 21, 2011. The U.S. has since relied on the Russian Soyuz spacecraft to transport astronauts to the International Space Station, pending the Commercial Crew Development and Space Launch System programs with flights to begin in the 2020s.

Explanation:

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A) Which name refers to the slaves who worked at hard labor in the city-state of Sparta?
aleksandrvk [35]
  • Answer: Which name refers to the slaves who worked at the hard-working city of Sparta? Helots.
  • Which country's fleet lost the Battle of Salamis? Persia.
  • Who established the rule by the assembly and people's courts with juries in Athens? Solon.
  • What title was Darius known to the Persian people? Lawgiver.
  • For which achievement is the Athenian leader Pericles celebrated? He sowed the seeds of democracy by establishing a popularly-elected assembly.

Explanation:

  • Helots - The lowest class of Spartan society. A social class that had no rights. The helots were the state slaves of Spartan society. The Spartan could have killed Helot without being held accountable. The Helots worked on state estates and gave most of the proceeds to the state. They only had one small part left to survive.
  • Battle of Salamis - It is one of the most famous battles of the Peloponnesian War, fought between Persia and the united Greek states/cities (Polis). Temisocles led the Greek and Xerkes Perth fleets. The Persian fleet was more numerous, but by the high manoeuvres of Temisocles, the Greeks were able to defeat the Persians in this battle.
  • Solon - The goal of Solon's reforms was to eradicate it tyranny as a form of government because aristocratic families fought for absolute domination. Solon introduced changes to reconcile the political and economic image of society. His way of reform meant coming to a position based on his abilities, not based on aristocratic affiliation. This type of improvement is rooted in the democratic values ​​of a society.
  • Darius the Great has been remembered in history as one of the greatest rulers of the ancient world. After curbing the riots in the eastern states, he sought to reorganize the state. He divided the land into provinces to create greater autonomy but separated civilian authority from the military to prevent separatism. He burdened the central wool with parallels and thus enriched the treasury.
  • Pericles - has introduced forms of democracy into Athenian society. After the collapse of oligarchic rule in a democracy, Pericles sought to implement reforms in the political life of Athens. It gave more impoverished citizens access to administration and the judiciary. Pericles gave all power to the National Assembly, which consisted of all free Athenians with civilian status. It ruled all state affairs, and formally Athens became a democratic republic.
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yawa3891 [41]

<span><span>IT IS an awful lot of rubbish. Since 1960 the amount of municipal waste being collected in America has nearly tripled, reaching 245m tonnes in 2005. According to European Union statistics, the amount of municipal waste produced in western Europe increased by 23% between 1995 and 2003, to reach 577kg per person. (So much for the plan to reduce waste per person to 300kg by 2000.) As the volume of waste has increased, so have recycling efforts. In 1980 America recycled only 9.6% of its municipal rubbish; today the rate stands at 32%. A similar trend can be seen in Europe, where some countries, such as Austria and the Netherlands, now recycle 60% or more of their municipal waste. Britain's recycling rate, at 27%, is low, but it is improving fast, having nearly doubled in the past three years.Even so, when a city introduces a kerbside recycling programme, the sight of all those recycling lorries trundling around can raise doubts about whether the collection and transportation of waste materials requires more energy than it saves. We are constantly being asked: Is recycling worth doing on environmental grounds? says Julian Parfitt, principal analyst at Waste & Resources Action Programme (WRAP), a non-profit British company that encourages recycling and develops markets for recycled materials.Studies that look at the entire life cycle of a particular material can shed light on this question in a particular case, but WRAP decided to take a broader look. It asked the Technical University of Denmark and the Danish Topic Centre on Waste to conduct a review of 55 life-cycle analyses, all of which were selected because of their rigorous methodology. The researchers then looked at more than 200 scenarios, comparing the impact of recycling with that of burying or burning particular types of waste material. They found that in 83% of all scenarios that included recycling, it was indeed better for the environment.Based on this study, WRAP calculated that Britain's recycling efforts reduce its carbon-dioxide emissions by 10m-15m tonnes per year. That is equivalent to a 10% reduction in Britain's annual carbon-dioxide emissions from transport, or roughly equivalent to taking 3.5m cars off the roads. Similarly, America's Environmental Protection Agency estimates that recycling reduced the country's carbon emissions by 49m tonnes in 2005.Recycling has many other benefits, too. It conserves natural resources. It also reduces the amount of waste that is buried or burnt, hardly ideal ways to get rid of the stuff. (Landfills take up valuable space and emit methane, a potent greenhouse gas; and although incinerators are not as polluting as they once were, they still produce noxious emissions, so people dislike having them around.) But perhaps the most valuable benefit of recycling is the saving in energy and the reduction in greenhouse gases and pollution that result when scrap materials are substituted for virgin feedstock. If you can use recycled materials, you don't have to mine ores, cut trees and drill for oil as much,says Jeffrey Morris of Sound Resource Management, a consulting firm based in Olympia, Washington.Extracting metals from ore, in particular, is extremely energy-intensive. Recycling aluminium, for example, can reduce energy consumption by as much as 95%. Savings for other materials are lower but still substantial: about 70% for plastics, 60% for steel, 40% for paper and 30% for glass. Recycling also reduces emissions of pollutants that can cause smog, acid rain and the contamination of waterways.</span></span>
4 0
3 years ago
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Which of the following contributed to the North's steady population growth in the years prior to the Civil War? the opportunity
My name is Ann [436]
Although there were many factors, the greatest was "<span>an increase in the number of factories and jobs". Industrialization had begun in the United States, opening up many more factory positions. </span>
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Citizens of Athens during the Golden Age saw _____.
Andrej [43]

Answer:

Democracy Flourish

Explanation:

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Machiavelli is considered be some to be the father of modern political science
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This is correct.

Machiavelli was an Italian political philosopher whose famous work, the Prince, is an in-depth look at what is necessary for a ruler to be effective, both in terms of ruling a people but also in doing what needs to be done.

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