How did studies of the crab nebula pin down the explanation of pulsars?

Answers

Answer 1
A pulsar is a neutron star that gives off pulses of radio waves. The Crab Nebula, which is one of millions of gas and dust clouds in space, was found to house a pulsar in the system as is the central object present. Astronomers observing the nebula noticed that it released pulses of radiation that span the electromagnetic spectrum, pulsing radio, gamma and xrays. 

Related Questions

Describe an example of how necessity brings about technological change?

Answers

The structure of buildings and temples were built many years ago, you see places like Washington DC replicate the same types of structure in their buildings the art of it is beautiful and well liked.



The technological changes are those seen in building designs and they increase the efficiency of the products. They also help to increase the result of the output.

Most essential technological changes are associated with the costs such as increasing production and quality, a decrease in prices. Cost of storage etc. The technological changes are associated with the technological developments from invention to innovation and then diffusion. Example of the changes in the temple and building styles.

Learn more about the example of how necessity brings about technological change.

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Which layer of earth's atmosphere contains no water vapor, has an atmospheric pressure less than 0.1 atmosphere, and has an air temperature that increases with altitude?

Answers

Thermosphere Let's look at the layers from the bottom to the top and see where the first match is. Troposphere - Lowest layer. Temperature usually declines with increasing altitude. Almost all the water vapor is contained in this layer... This is not the right layer. Lots of water vapor and decreasing temperatures. So let's continue. Stratosphere - Second-lowest layer of Earth's atmosphere. Temperatures rise with increasing altitude. Pressure ranges from about 200 millibars down to 1 millibar. The stratosphere is almost completely free of clouds. Got a couple of problems here. The pressure is a bit higher than we want, and there are sometimes clouds here. Which means water vapor. Not the right layer, so up we go. Mesosphere - Third layer. Temperatures drop with increasing altitude. Dropping temperatures. Don't want this layer either. Still going up. Thermosphere - Fourth layer. Temperatures increase with increasing altitude. This layer is completely cloudless and free of water vapor. Looks good. No clouds ever and increasing temperature. The pressure is well below 0.1 atmospheres. Looks like this is the answer.

Final answer:

The layer of Earth's atmosphere that contains no water vapor, has an atmospheric pressure less than 0.1 atmosphere, and an air temperature that increases with altitude is the mesosphere. This layer is located above the stratosphere and extends from about 50 kilometers (km) to roughly 85 kilometers above the Earth's surface.

Explanation:

The mesosphere is the third layer of the Earth's atmosphere, situated above the stratosphere and below the thermosphere. It extends from the stratopause at approximately 50 km to about 85 km above the Earth's surface. One of the unique characteristics of the mesosphere is the absence of water vapor, contributing to its extremely low temperatures, which can drop to around -90°C. Unlike the lower atmospheric layers, the mesosphere experiences a decrease in temperature with increasing altitude. However, in terms of its relationship with pressure and temperature, it differs from the stratosphere, where temperature increases with altitude, primarily due to the absorption of ultraviolet radiation by the ozone layer. The air pressure in the mesosphere is exceedingly low, less than 0.1 atmospheres, and the air is too thin to breathe without pressurization and supplemental oxygen. This region of the atmosphere is also where meteors burn up upon entering the Earth's atmosphere due to the increase in temperature with altitude and friction.

Almost two thirds of earth's freshwater is located in the

Answers

the great lakes or oceans

a. bogota
b. caracas
c. buenos aires
d. montevideo

Answers

Final answer:

Depending on the context, the student's question regarding Bogotá, Caracas, Buenos Aires, or Montevideo could pertain to historical events, a novel's setting, or trade agreements in South America. All four are capitals with distinct historical and geopolitical significance.

Explanation:

The student's question seems to be asking for a specific location related to a historical event, novel setting, or geopolitical association. We have context that could relate to multiple subjects such as the historical Venezuelan coup détat of 1958, the literary setting of the town of Macondo in Gabriel García Márquez's novel, or the modern trade relations within Mercosur. Depending on the missing part of the question, Bogotá, Caracas, Buenos Aires, and Montevideo are capital cities in South America with rich historical and political significance.

Bogotá is the capital of Colombia and has historical relevance such as being the site of the 'Bogotazo'. Caracas is the capital of Venezuela and has been central in the country's political history. Buenos Aires is the capital of Argentina and was the seat of the Viceroyalty of Río de la Plata; it's an important economic hub historically tied to trade. Montevideo is the capital of Uruguay and is noteworthy for its role in the independence movement of the country as well as being the headquarters for Mercosur.

Which natural resource is important to the desert region and mountain region?

Answers

Minerals are the important natural resource.
In desert regions or arid lands, it can be found rich mineral deposits as result of high evaporation. When there are lakes or water formations due to eventual water deposition, they lead to high concentrate mineral sources of minerals such as gypsum, borates, and salts.
In mountain regions, there can be often found minerals, and mining is often present. 

Answer:

The answer is Minerals are the critical characteristic asset.  

Explanation:

In desert districts or dry terrains, it tends to be discovered rich mineral stores as consequence of high vanishing. At the point when there are lakes or water arrangements because of inevitable water affidavit, they prompt high think mineral wellsprings of minerals such as gypsum, boaters, and salts.  In mountain regions, there can be regularly discovered minerals, and mining is frequently present.

A typical passage through the Panama Canal takes how long?
Question 26 options:

2 – 4 hours

8 – 10 hours

2 – 4 days

8 – 10 days
Save

Answers

The Panama Canal is 77 km long, and is divided into three parts, which means that during each transit, the ship will go through 3 locks -  because the middle part of the canal is above the sea level. So a huge portion of the time is spent waiting in the lock to adjust to the hight of the lake in the middle of the canal. 

The time to pass it is around 6 -8-10 hours -  second option is the best 

In what year was an uninhabited island located 1,404 miles away from the nearest human discovered? 1184 points

Answers

1739 by Jean Baptiste Charles Bouvet De Lozier

1739 by Jean Baptiste Charles Bouvet De Lozier was an uninhabited island located 1,404 miles away from the nearest human discovered.

What is meant by  uninhabited island?

Uninhabited island is the place where there is no living or the area which is not occupied by the people. The reason of the uninhabited island is maybe the financial, political, religious or environmental issues.

One of the largest inhabited islands is Devon Island, which is located in Canada. The reason for not being able to live in the uninhabited area may also be the natural resources. As there are no natural resources, it becomes difficult for the people to survive without them.

Thus, 1739 by Jean Baptiste Charles Bouvet De Lozier was an uninhabited island located 1,404 miles away

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What state has an acre of water for every 20 acres of land?

Answers

the answer is Minnesota
Final answer:

The state of Alaska has an acre of water for every 20 acres of land. The water footprint of various activities and forms of agriculture, from almonds to livestock, have significant impacts on water usage. The sustainable use and preservation of water resources ensures their availability for various purposes.

Explanation:

Due to the unique combination of its geography and climate, the state of Alaska has an acre of water for every 20 acres of land. This is a significant amount of water, particularly considering that agriculture occupies 40 percent of Earth's ice-free land mass and accounts for about 70 percent of freshwater use. The water in Alaska comes in the form of lakes, rivers, and glaciers, and is vital for supporting both the local ecosystem and human activities.

However, remember that water is also impacted by consumption habits and activities. For instance, almonds and livestock have a significant 'water footprint'. Interestingly, it's known that dairy milk takes more water to produce than almond milk, with steak needing even more, possibly up to 900 gallons of water to produce.

The sustainable use and preservation of water resources is important as it not only ensures the availability of water for agricultural activities but also for household use, supporting biodiversity and maintaining the overall health of our ecosystem.

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How do humans negatively affect the ocean.

Answers

By mass fishing, off shore drilling, and population.

What time is it when the new moon is highest in the sky?

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Rotate the Earth counter clockwise in the direction shown by the arrow to mimic the passing of time. Show that the Full Moon rises at 6pm, is highest in the sky at midnight and sets at 6 am. It is not visible in the sky at noon because the Earth itself blocks the Moon from view.

Final answer:

The new moon is highest in the sky at solar noon, which is when the Sun is at its highest point in the sky for the day. This time varies slightly depending on your location's longitude and the equation of time but is generally around local noon. Note that because we use time zones, solar noon doesn't always align perfectly with 12:00 PM on the clock.

Explanation:

The phase of the new moon occurs when the Moon is located between Earth and the Sun, making it invisible from Earth due to the Sun's brightness overpowering the Moon's reflected light. During the new moon, since the Moon and the Sun are approximately in the same direction in the sky, the Moon will be highest when the Sun is at its highest, which is solar noon. The Sun's position in the sky at solar noon will be directly south in the Northern Hemisphere and directly north in the Southern Hemisphere. This alignment is also why we don't typically see the new moon; it is too close to the Sun's glare to be visible.

Almost half of Russia's land is ____

-Forest
-Tundra
-Mountains
-Steppes

Answers

Almost half of Russia's land is steppes.

When the oceanic crust runs into the continental crust, what happens?

Answers

Answer:

hi!

Explanation:

When continental and oceanic plates collide, the thinner and more dense oceanic plate is overridden by the thicker and less dense continental plate. The oceanic plate is forced down into the mantle in a process known as "subduction." As the oceanic plate descends, it is forced into higher temperature environments.

Answer:

The oceanic plate sinks below the continental plate.

Hope this helps.

Explanation:

Southwestern north america contains a large area called the basin and range province. what is the origin of this name?

Answers

Ranges are uplifted horst blocks adjacent to basins formed as graben

If earth's axis had no tilt, would we still have seasons? why or why not?

Answers

i don't think so. if its too even and have no tilt, everything will be the same

which region was under the influence of both russia and england? a. persia b. china or d. the caucasus

Answers

The correct answer should be Persia. Russian and British had a lot involvement in Persia in the 18th and 19th century and influenced their politics. They even led wars against the locals and meddled in their affairs. China and Caucasus had involvement but not on such a great scale.

Answer:

The answer is option A.

Explanation:

Russian and British had a ton inclusion in Persia in the eighteenth and nineteenth century and impacted their legislative issues. They even drove wars against local people and interfered in their issues. China and Caucasus had inclusion however not on such an extraordinary scale. Under Cyrus the Great, Persia turned into the focal point of an intense domain that included western Asia, Egypt, and parts of eastern Europe it was inevitably ousted by Alexander the Great in 330 BC.

Which of the following statements about bioengineered foods is false?
A.
Their DNA has been modified.
B.
They have been genetically modified.
C.
They were developed during the Green Revolution.
D.
Genetic material from another organisms is sometimes added.

Answers

c.They were developed during the green revolution

Bioengineered foods or also referred to as genetically modified foods are foods produced using the methods of genetic engineering for DNA altering.

The following statement about bioengineered foods is false: They were developed during the Green Revolution.  Correct answer: C

The Green revolution was period characterized with increased productivity of global agriculture because of new technologies, but those new technologies did not include GMO.

Which of the following geographic regions is the most politically diverse?

Answers

I think the answer would most likely be the West region because in my research description I have found that the west is so politically diverse and a very large region.

Hope my answer is correct and helps! :O

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