Will the coronavirus ever go away?
No one knows for sure. Scientists think the virus that causes Covid-19 may be with us for decades or longer, but that doesn't mean it will keep posing the same threat.
The virus emerged in late 2019 and it's difficult to predict how it will behave over the long term. But many experts believe it's likely the disease will eventually ease from a crisis to a nuisance like the common cold.
That would happen as people build up immunity over time, either through infection or vaccination. Other viruses have followed a similar path.
The 1918 flu pandemic could also offer clues about the course of Covid-19.
No one knows for sure. Scientists think the virus that causes Covid-19 may be with us for decades or longer, but that doesn't mean it will keep posing the same threat.
The virus emerged in late 2019 and it's difficult to predict how it will behave over the long term. But many experts believe it's likely the disease will eventually ease from a crisis to a nuisance like the common cold.
That would happen as people build up immunity over time, either through infection or vaccination. Other viruses have followed a similar path.
The 1918 flu pandemic could also offer clues about the course of Covid-19.
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What Is the Hubble Space Telescope?
The Hubble Space Telescope is a large telescope in space. NASA launched Hubble in 1990. Hubble is as long as a large school bus. It weighs as much as two adult elephants. Hubble travels around Earth at about 5 miles per second.
Hubble faces toward space. It takes pictures of planets, stars and galaxies. Hubble has seen stars being born. Hubble has seen stars die. It has seen galaxies that are trillions of miles away. Hubble also has seen comet pieces crash into the gases above Jupiter.
Scientists have learned a lot about space from Hubble pictures. The pictures are beautiful to look at too.
The Hubble Space Telescope is a large telescope in space. NASA launched Hubble in 1990. Hubble is as long as a large school bus. It weighs as much as two adult elephants. Hubble travels around Earth at about 5 miles per second.
Hubble faces toward space. It takes pictures of planets, stars and galaxies. Hubble has seen stars being born. Hubble has seen stars die. It has seen galaxies that are trillions of miles away. Hubble also has seen comet pieces crash into the gases above Jupiter.
Scientists have learned a lot about space from Hubble pictures. The pictures are beautiful to look at too.
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What is Sandstorm or Dust Storm?
A dust storm, also called sandstorm, is a meteorological phenomenon common in arid and semi-arid regions. Dust storms arise when a gust front or other strong wind blows loose sand and dirt from a dry surface. Fine particles are transported by saltation and suspension, a process that moves soil from one place and deposits it in another.
Drylands around North Africa and the Arabian peninsula are the main terrestrial sources of airborne dust.
The term sandstorm is used most often in the context of desert dust storms, especially in the Sahara Desert, or places where sand is a more prevalent soil type than dirt or rock, when, in addition to fine particles obscuring visibility, a considerable amount of larger sand particles are blown closer to the surface. 🌪
A dust storm, also called sandstorm, is a meteorological phenomenon common in arid and semi-arid regions. Dust storms arise when a gust front or other strong wind blows loose sand and dirt from a dry surface. Fine particles are transported by saltation and suspension, a process that moves soil from one place and deposits it in another.
Drylands around North Africa and the Arabian peninsula are the main terrestrial sources of airborne dust.
The term sandstorm is used most often in the context of desert dust storms, especially in the Sahara Desert, or places where sand is a more prevalent soil type than dirt or rock, when, in addition to fine particles obscuring visibility, a considerable amount of larger sand particles are blown closer to the surface. 🌪
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Where did all of Mars' water go?
Billions of years ago, Mars was home to lakes and oceans — but where all the water went to transform the planet into the desolate rock we know today has been something of a mystery. Most of it was thought to have been lost to space, but a new study funded by NASA proposes that it didn't go anywhere but is trapped within minerals in the crust. "We're saying that the crust forms what we call hydrated minerals, so minerals that actually have water in their crystal structure.
Billions of years ago, Mars was home to lakes and oceans — but where all the water went to transform the planet into the desolate rock we know today has been something of a mystery. Most of it was thought to have been lost to space, but a new study funded by NASA proposes that it didn't go anywhere but is trapped within minerals in the crust. "We're saying that the crust forms what we call hydrated minerals, so minerals that actually have water in their crystal structure.
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What is Financial Market?
Financial Market refers to the marketplace where the activities related to the creation and trading of the different financial assets such as bonds, shares, commodities, currencies, derivatives etc takes place.
It provides the platform to sellers and buyers of the financial assets to meet and trade with each other at a price as determined by market forces.
Financial Market refers to the marketplace where the activities related to the creation and trading of the different financial assets such as bonds, shares, commodities, currencies, derivatives etc takes place.
It provides the platform to sellers and buyers of the financial assets to meet and trade with each other at a price as determined by market forces.
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What is Permafrost?
Permafrost is any ground that remains completely frozen—32°F (0°C) or colder—for at least two years straight. These permanently frozen grounds are most common in regions with high mountains and in Earth’s higher latitudes—near the North and South Poles.
Permafrost covers large regions of the Earth. Almost a quarter of the land area in the Northern Hemisphere has permafrost underneath. Although the ground is frozen, permafrost regions are not always covered in snow.
What Is Permafrost Made Of?
Permafrost is made of a combination of soil, rocks and sand that are held together by ice. The soil and ice in permafrost stay frozen all year long.
Permafrost soils also contain large quantities of organic carbon—a material leftover from dead plants that couldn’t decompose, or rot away, due to the cold and minerals.
Permafrost is any ground that remains completely frozen—32°F (0°C) or colder—for at least two years straight. These permanently frozen grounds are most common in regions with high mountains and in Earth’s higher latitudes—near the North and South Poles.
Permafrost covers large regions of the Earth. Almost a quarter of the land area in the Northern Hemisphere has permafrost underneath. Although the ground is frozen, permafrost regions are not always covered in snow.
What Is Permafrost Made Of?
Permafrost is made of a combination of soil, rocks and sand that are held together by ice. The soil and ice in permafrost stay frozen all year long.
Permafrost soils also contain large quantities of organic carbon—a material leftover from dead plants that couldn’t decompose, or rot away, due to the cold and minerals.
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Satellite ELSA-d to Clean up Space Debris
ELSA-d is the world’s first commercial mission that will demonstrate technologies for space debris docking and removal.
ELSA-d's servicer satellite has been developed to safely remove debris objects from orbit, equipped with proximity rendezvous technologies and a magnetic docking mechanism.
ELSA-d consists of two satellites stacked together -- one is a servicer designed to safely remove debris from orbit and the other a client satellite that will serve as a piece of replica or mock debris.
ELSA-d is the world’s first commercial mission that will demonstrate technologies for space debris docking and removal.
ELSA-d's servicer satellite has been developed to safely remove debris objects from orbit, equipped with proximity rendezvous technologies and a magnetic docking mechanism.
ELSA-d consists of two satellites stacked together -- one is a servicer designed to safely remove debris from orbit and the other a client satellite that will serve as a piece of replica or mock debris.
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SATURN'S TILT
A team of researcher reported that Saturn’s axial tilt is caused by the gravitational pull of Saturn’s moons as they migrate away from their host planet.
Saturn is the sixth planet from the Sun and the second largest planet in our solar system and is made mostly of hydrogen and helium.
Its axis is tilted by 26.73 degrees with respect to its orbit around the Sun, which is similar to Earth's 23.5-degree tilt.
Saturn is the planets with most moons. Titan is the largest moon of Saturn and the second-largest natural satellite in the Solar System.
(Jupiter's moon Ganymede is largest.)
A team of researcher reported that Saturn’s axial tilt is caused by the gravitational pull of Saturn’s moons as they migrate away from their host planet.
Saturn is the sixth planet from the Sun and the second largest planet in our solar system and is made mostly of hydrogen and helium.
Its axis is tilted by 26.73 degrees with respect to its orbit around the Sun, which is similar to Earth's 23.5-degree tilt.
Saturn is the planets with most moons. Titan is the largest moon of Saturn and the second-largest natural satellite in the Solar System.
(Jupiter's moon Ganymede is largest.)
PLANTS GENERATING MAGNETIC FIELD
• A recent study by scientific from Germany found that the Venus Flytrap (Dionaea muscipula) plant is capable of generating small magnetic fields.
• These plants send electrical signals to trigger the closure of their traps, to catch an insect, a biomagnetism phenomenon was observed. While leaf stalk, or petiole, is not excitable and is electrically insulated from the trap.
• Magnetic signals in plants are very weak and it was extremely difficult to measure, while using new and advanced atomic magnetometers it is measured at amplitude of up to 0.5 picotesla, which is millions of times weaker than the Earth's magnetic field.
• Scientists hope that this can help in identifying how the plant responds to sudden temperature changes, chemicals, and pest attacks
• A recent study by scientific from Germany found that the Venus Flytrap (Dionaea muscipula) plant is capable of generating small magnetic fields.
• These plants send electrical signals to trigger the closure of their traps, to catch an insect, a biomagnetism phenomenon was observed. While leaf stalk, or petiole, is not excitable and is electrically insulated from the trap.
• Magnetic signals in plants are very weak and it was extremely difficult to measure, while using new and advanced atomic magnetometers it is measured at amplitude of up to 0.5 picotesla, which is millions of times weaker than the Earth's magnetic field.
• Scientists hope that this can help in identifying how the plant responds to sudden temperature changes, chemicals, and pest attacks
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Why is mercury used in thermometer?
Mercury is the only metal which is in liquid state even at the ordinary room temperature. Also, it uniformly expands when heated and does not stick to the walls of thermometer. Its high boiling point and low freezing point is the main reason for using it in ordinary thermometers.
Mercury is the only metal which is in liquid state even at the ordinary room temperature. Also, it uniformly expands when heated and does not stick to the walls of thermometer. Its high boiling point and low freezing point is the main reason for using it in ordinary thermometers.
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Since gravity is unlimited, can we use it as an infinite energy source?
No, gravity can not be used as an infinite energy source. In fact, strictly speaking, gravity itself can not be used as an energy source at all. You are confusing forces with energy, which are very different things.
Energy is a property of objects, such as balls, atoms, light beams, or batteries. In contrast, forces describe the interaction between objects. Forces are the way that energy is transferred from one object to another when they interact, but forces are not the energy itself. Gravity is a force, so it just provides one way for objects to exchange and transform energy to different states.
No, gravity can not be used as an infinite energy source. In fact, strictly speaking, gravity itself can not be used as an energy source at all. You are confusing forces with energy, which are very different things.
Energy is a property of objects, such as balls, atoms, light beams, or batteries. In contrast, forces describe the interaction between objects. Forces are the way that energy is transferred from one object to another when they interact, but forces are not the energy itself. Gravity is a force, so it just provides one way for objects to exchange and transform energy to different states.
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Can a star turn into a planet?
Yes, a star can turn into a planet, but this transformation only happens for a very particular type of star known as a brown dwarf.
Some scientists do not consider brown dwarfs to be true stars because they do not have enough mass to ignite the nuclear fusion of ordinary hydrogen.
At the same time, some scientists do not consider brown dwarfs to be true planets either because they typically sit at the center of a solar system, just like a star.
Yes, a star can turn into a planet, but this transformation only happens for a very particular type of star known as a brown dwarf.
Some scientists do not consider brown dwarfs to be true stars because they do not have enough mass to ignite the nuclear fusion of ordinary hydrogen.
At the same time, some scientists do not consider brown dwarfs to be true planets either because they typically sit at the center of a solar system, just like a star.
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What keeps space empty?
Space is not empty. A point in outer space is filled with gas, dust, a wind of charged particles from the stars, light from stars, cosmic rays, radiation left over from the Big Bang, gravity, electric and magnetic fields, and neutrinos from nuclear reactions.
As the book "Nothingness: The Science of Empty Space" by Dr. Henning Genz describes, space is also filled with two things we can't directly detect: dark matter and dark energy.
Even if all these things could be removed and blocked out from a certain region of space, there would still be three things we could never remove according to Dr. Genz: (1) vacuum energy, (2) the Higgs field, and (3) spacetime curvature.
Space is not empty. A point in outer space is filled with gas, dust, a wind of charged particles from the stars, light from stars, cosmic rays, radiation left over from the Big Bang, gravity, electric and magnetic fields, and neutrinos from nuclear reactions.
As the book "Nothingness: The Science of Empty Space" by Dr. Henning Genz describes, space is also filled with two things we can't directly detect: dark matter and dark energy.
Even if all these things could be removed and blocked out from a certain region of space, there would still be three things we could never remove according to Dr. Genz: (1) vacuum energy, (2) the Higgs field, and (3) spacetime curvature.
Can wind travel faster than the speed of sound?
Yes, wind can travel faster than the speed of sound. Wind is just the bulk movement of a mass of air through space and is in principle no different from a train speeding along or a comet zipping through space. The only limitation on the bulk motion of objects with mass is the universal speed limit of the speed of light in vacuum.
The speed of sound is not a fundamental speed like the speed of light is. The speed of sound just describes how fast a mechanical wave travels through a material.
Yes, wind can travel faster than the speed of sound. Wind is just the bulk movement of a mass of air through space and is in principle no different from a train speeding along or a comet zipping through space. The only limitation on the bulk motion of objects with mass is the universal speed limit of the speed of light in vacuum.
The speed of sound is not a fundamental speed like the speed of light is. The speed of sound just describes how fast a mechanical wave travels through a material.