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what is hindi names of all planets ? for eg. mars :- mangal
DIFFERENCE BETWEEN PLANETS AND SATELLITES
give 5 uses of artificial satellites???
why does pole star appears to be stationary in the night sky whereas all other stars appear to be moving from east to west?????????????
why does the pole star appear stationary in the skly ,whereas all other stars appear to move from east to west???
name the planets that were discovered after the invention of telescope.
What is the importance of the 'Pole star'?
why planets do not collide while revolving around the sun
why do stars appear to twinkle????
what are the differences between star and a shooting star ???
Why does a star appear to rise four minutes earlier in the sky everyday than the previous day?
IS THERE A SHORT WAY TO REMEMBER THE 9 PLANETS
what is saptarishi?
some scientists claim that there was life on mars. is it really true? or its all nonsense.
What is air pollution , name 4 air pollutants, sources & effects?
Why do the Lines of Latitude decrease when moving towards the Pole
how can we locate pole star with the help of ursa major
why do we classify the sun as a star?
what is big bang theory?
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. This is a type of greenhouse effect.
Earth's climate is mostly influenced by the first 6 miles or so of the atmosphere which contains most of the matter making up the atmosphere. This is really a very thin layer if you think about it. In the book The End of Nature, author Bill McKibbin tells of walking three miles to from his cabin in the Adirondack's to buy food. Afterwards, he realized that on this short journey he had traveled a distance equal to that of the layer of the atmosphere where almost all the action of our climate is contained. In fact, if you were to view Earth from space, the principle part of the atmosphere would only be about as thick as the skin on an onion! Realizing this makes it more plausible to suppose that human beings can change the climate. A look at the amount of greenhouse gases we are spewing into the atmosphere (see below), makes it even more plausible.
The most significant greenhouse gas is actually water vapor, not something produced directly by humankind in significant amounts. However, even slight increases in atmospheric levels of carbon dioxide (CO2) can cause a substantial increase in temperature.
Why is this? There are two reasons: First, although the concentrations of these gases are not nearly as large as that of oxygen and nitrogen (the main constituents of the atmosphere), neither oxygen or nitrogen are greenhouse gases. This is because neither has more than two atoms per molecule (i.e. their molecular forms are O2 and N2, respectively), and so they lack the internal vibrational modes that molecules with more than two atoms have. Both water and CO2, for example, have these "internal vibrational modes", and these vibrational modes can absorb and reradiate infrared radiation, which causes the greenhouse effect.
Secondly, CO2 tends to remain in the atmosphere for a very long time (time scales in the hundreds of years). Water vapor, on the other hand, can easily condense or evaporate, depending on local conditions. Water vapor levels therefore tend to adjust quickly to the prevailing conditions, such that the energy flows from the Sun and re-radiation from the Earth achieve a balance. CO2 tends to remain fairly constant and therefore behave as a controlling factor, rather than a reacting factor. More CO2 means that the balance occurs at higher temperatures and water vapor levels.
Human beings have increased the CO2 concentration in the atmosphere by about thirty percent, which is an extremely significant increase, even on inter-glacial timescales. It is believed that human beings are responsible for this because the increase is almost perfectly correlated with increases in fossil fuel combustion, and also due other evidence, such as changes in the ratios of different carbon isotopes in atmospheric CO2 that are consistent with "anthropogenic" (human caused) emissions. The simple fact is, that under "business as usual" conditions, we'll soon reach carbon dioxide concentrations that haven't been seen on Earth in the last 50 million years.
Combustion of Fossil Fuels, for electricity generation, transportation, and heating, and also the manufacture of cement, all result in the total worldwide emission of about 22 billion tons of carbon dioxide to the atmosphere each year. About a third of this comes from electricity generation, and another third from transportation, and a third from all other sources.
This enormous input of CO2 is causing the atmospheric levels of CO2 to rise dramatically. The following graph shows the CO2 levels over the past 160 thousand years (the upper curve, with units indicated on the right hand side of the graph). The current level, and projected increase over the next hundred years if we do not curb emissions, are also shown (the part of the curve which goes way up high, to the right of the current level, is the projected CO2 rise). The projected increase in CO2 is very startling and disturbing. Changes in the Earth's average surface temperature are also shown (the lower curve, with units on the left). Note that it parallels the CO2 level curve very well.
What makes the star give out vast amount of energy?
Which of the following sets contains only objects that shine as a result of reflected light ?
(1) moons, planets and comets
(2) moons, comets and stars
(3) planets, stars and comets
(4) planets, stars and moons
what is pole star? why does it appears to be stationary? plzz give me the answer in short
what is the full form of WWF?
Name a star which appears stationary from the Earth. In which constellation is it situated?
What's the difference between meteor, meteorite and meteoroid?
Why do we see different phases of the moon
Why does moon changes its shape every day
What causes the change of season on earth?
write a short note on Phase of Moon ?
How is a constellation different from a star?
Thanks
Ashwin
Stars have their own light or not or they absorbs sunlight?
what is god particles . Please give in detail.
Which property of the pole star makes it very useful for sailors?
11. A satellite of mass m revolves around the earth of radius R at a height x from its surface. If g is the acceleration due to gravity on the surface of the earth, calculate the orbital speed of the satellite.
why do stars give out heat and light?
Differentiate between galaxies and constellations in points
Tell some differences between stars, planets and satellites ?
what is big bang theory? how our earth formed
Can anyone explain me what a blackhole is.
why does pole star not seems to move
1. A star is light years away from the earth. what does it mean ?
2. Why do stars look ery small although these are huge heaenly bodies ?
3. The moon is not a star but still shines . give reason
4. The planet mercury does not have an atmosphere. How does this affect the temperature on its surface ?
5. Write two uses of remote sensing satellites ?
6. Why does planets not collide with each other during their journey around the sun ?
7. Why does the tail of a comet always point away from the sun ?
8. Why does the pole star appears stationary in the sky, where as all other stars appears to move from East to West.
WHY IS EARTH KNOWN AS "UNIQUE PLANET" ?EXPLAIN
Which is the largest asteroid at present? (I know the answer. I just want to see how many of you do know it. Wait for a day till you get surprised. I am sorry but even wikipedia has not yet got the big news)
why is the distance between stars expressed in light years? what do you understand by the statement that a star is eight years away from the earth
Why do all stars in the sky appear to move from east to west?
what is difference between meteors and meteorites?
Big Bang?
why,only earth is a planet which supports life????why not other planets??????
What is responsible for the change in seasons on Earth?
a) Earth's revolution around the Sun
b) The tilt on Earth's axis
what is the relation between light year and kilimeter?
In world map the maximum distortion is at the:
A>tropic of cancer b> equator c>tropic of capricon d> poles
I urgently need a slogan on Mysterious universe
do all the stars in the sky moves?explain
why do scientists predict the existence of life on mars?
what conditions make life possible on earth ???
Who is Stephen Hawking?
If I am 13 years old how many times have I revolved around the Sun.
a meteor makes a streak of light when it falls on d earth. Do u think it would look d same when falling on d moon???? Plzz ans. Fst 2morrow is my exam.. I'll give a thumbs up who'll an. D ques....
why can we only see one side of the moon????
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Syllabus
what is hindi names of all planets ? for eg. mars :- mangal
DIFFERENCE BETWEEN PLANETS AND SATELLITES
give reason if yes or no
give 5 uses of artificial satellites???
why does pole star appears to be stationary in the night sky whereas all other stars appear to be moving from east to west?????????????
What is the movement of the earth around the sun called?
why does the pole star appear stationary in the skly ,whereas all other stars appear to move from east to west???
name the planets that were discovered after the invention of telescope.
What is the importance of the 'Pole star'?
a) an asteroid
b) a satellite
c) a comet
d) a constellation
why planets do not collide while revolving around the sun
why do stars appear to twinkle????
what are the differences between star and a shooting star ???
Why does a star appear to rise four minutes earlier in the sky everyday than the previous day?
IS THERE A SHORT WAY TO REMEMBER THE 9 PLANETS
what is saptarishi?
some scientists claim that there was life on mars. is it really true? or its all nonsense.
What is air pollution , name 4 air pollutants, sources & effects?
Why do the Lines of Latitude decrease when moving towards the Pole
how can we locate pole star with the help of ursa major
why do we classify the sun as a star?
what is big bang theory?
Global Warming is the increase of Earth's average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil fuels or from deforestation, which trap heat that would otherwise escape from Earth. This is a type of greenhouse effect.
Is global warming, caused by human activity, even remotely plausible?Earth's climate is mostly influenced by the first 6 miles or so of the atmosphere which contains most of the matter making up the atmosphere. This is really a very thin layer if you think about it. In the book The End of Nature, author Bill McKibbin tells of walking three miles to from his cabin in the Adirondack's to buy food. Afterwards, he realized that on this short journey he had traveled a distance equal to that of the layer of the atmosphere where almost all the action of our climate is contained. In fact, if you were to view Earth from space, the principle part of the atmosphere would only be about as thick as the skin on an onion! Realizing this makes it more plausible to suppose that human beings can change the climate. A look at the amount of greenhouse gases we are spewing into the atmosphere (see below), makes it even more plausible.
What are the Greenhouse Gases?The most significant greenhouse gas is actually water vapor, not something produced directly by humankind in significant amounts. However, even slight increases in atmospheric levels of carbon dioxide (CO2) can cause a substantial increase in temperature.
Why is this? There are two reasons: First, although the concentrations of these gases are not nearly as large as that of oxygen and nitrogen (the main constituents of the atmosphere), neither oxygen or nitrogen are greenhouse gases. This is because neither has more than two atoms per molecule (i.e. their molecular forms are O2 and N2, respectively), and so they lack the internal vibrational modes that molecules with more than two atoms have. Both water and CO2, for example, have these "internal vibrational modes", and these vibrational modes can absorb and reradiate infrared radiation, which causes the greenhouse effect.
Secondly, CO2 tends to remain in the atmosphere for a very long time (time scales in the hundreds of years). Water vapor, on the other hand, can easily condense or evaporate, depending on local conditions. Water vapor levels therefore tend to adjust quickly to the prevailing conditions, such that the energy flows from the Sun and re-radiation from the Earth achieve a balance. CO2 tends to remain fairly constant and therefore behave as a controlling factor, rather than a reacting factor. More CO2 means that the balance occurs at higher temperatures and water vapor levels.
How much have we increased the Atmosphere's CO2 Concentration?Human beings have increased the CO2 concentration in the atmosphere by about thirty percent, which is an extremely significant increase, even on inter-glacial timescales. It is believed that human beings are responsible for this because the increase is almost perfectly correlated with increases in fossil fuel combustion, and also due other evidence, such as changes in the ratios of different carbon isotopes in atmospheric CO2 that are consistent with "anthropogenic" (human caused) emissions. The simple fact is, that under "business as usual" conditions, we'll soon reach carbon dioxide concentrations that haven't been seen on Earth in the last 50 million years.
Combustion of Fossil Fuels, for electricity generation, transportation, and heating, and also the manufacture of cement, all result in the total worldwide emission of about 22 billion tons of carbon dioxide to the atmosphere each year. About a third of this comes from electricity generation, and another third from transportation, and a third from all other sources.
This enormous input of CO2 is causing the atmospheric levels of CO2 to rise dramatically. The following graph shows the CO2 levels over the past 160 thousand years (the upper curve, with units indicated on the right hand side of the graph). The current level, and projected increase over the next hundred years if we do not curb emissions, are also shown (the part of the curve which goes way up high, to the right of the current level, is the projected CO2 rise). The projected increase in CO2 is very startling and disturbing. Changes in the Earth's average surface temperature are also shown (the lower curve, with units on the left). Note that it parallels the CO2 level curve very well.
What makes the star give out vast amount of energy?
Which of the following sets contains only objects that shine as a result of reflected light ?
(1) moons, planets and comets
(2) moons, comets and stars
(3) planets, stars and comets
(4) planets, stars and moons
what is pole star? why does it appears to be stationary? plzz give me the answer in short
what is the full form of WWF?
Name a star which appears stationary from the Earth. In which constellation is it situated?
What's the difference between meteor, meteorite and meteoroid?
Why do we see different phases of the moon
Why does moon changes its shape every day
What causes the change of season on earth?
write a short note on Phase of Moon ?
How is a constellation different from a star?
Thanks
Ashwin
Stars have their own light or not or they absorbs sunlight?
what is god particles . Please give in detail.
Which property of the pole star makes it very useful for sailors?
11. A satellite of mass m revolves around the earth of radius R at a height x from its surface. If g is the acceleration due to gravity on the surface of the earth, calculate the orbital speed of the satellite.
12. An object is placed at a distance of 40 cm from a convex spherical mirror of radius of curvature 20 cm. At what distance from the object should a plane mirror be placed so that the image in the spherical mirror and plane mirror may be in one plane?13. What is displacement reaction? Explain with example. Also write down the reactivity series of the metals.why do stars give out heat and light?
I.it reflects light
II.it refracts light
III.of earth' s reflection of light
IV.of earth's refraction of light
Differentiate between galaxies and constellations in points
Tell some differences between stars, planets and satellites ?
Meteors, Meteriods, Meteriotes and Comet?
Kindly explain.
Thanking you in advance.
what is big bang theory? how our earth formed
Can anyone explain me what a blackhole is.
why does pole star not seems to move
Give five differences between planets and satellites
1. A star is light years away from the earth. what does it mean ?
2. Why do stars look ery small although these are huge heaenly bodies ?
3. The moon is not a star but still shines . give reason
4. The planet mercury does not have an atmosphere. How does this affect the temperature on its surface ?
5. Write two uses of remote sensing satellites ?
6. Why does planets not collide with each other during their journey around the sun ?
7. Why does the tail of a comet always point away from the sun ?
8. Why does the pole star appears stationary in the sky, where as all other stars appears to move from East to West.
WHY IS EARTH KNOWN AS "UNIQUE PLANET" ?EXPLAIN
Which is the largest asteroid at present? (I know the answer. I just want to see how many of you do know it. Wait for a day till you get surprised. I am sorry but even wikipedia has not yet got the big news)
why is the distance between stars expressed in light years? what do you understand by the statement that a star is eight years away from the earth
Why do all stars in the sky appear to move from east to west?
42. To weigh roughly two - thirds less than what you do on Earth, which planet would you be on?
(1) Uranus (2) Mars (3) Venus (4) Jupiter
what is difference between meteors and meteorites?
Big Bang?
why,only earth is a planet which supports life????why not other planets??????
What is responsible for the change in seasons on Earth?
a) Earth's revolution around the Sun
b) The tilt on Earth's axis
what is the relation between light year and kilimeter?
In world map the maximum distortion is at the:
A>tropic of cancer b> equator c>tropic of capricon d> poles
I urgently need a slogan on Mysterious universe
do all the stars in the sky moves?explain
Please give answer in 5-6 lines .
why do scientists predict the existence of life on mars?
An Earth-sized planet is found to be 9 light-years away from the Earth. If you are
traveling in a spaceship with a speed 22 km/s, then how much time will you take to
reach that planet?
what conditions make life possible on earth ???
Who is Stephen Hawking?
If I am 13 years old how many times have I revolved around the Sun.
a meteor makes a streak of light when it falls on d earth. Do u think it would look d same when falling on d moon???? Plzz ans. Fst 2morrow is my exam.. I'll give a thumbs up who'll an. D ques....
why can we only see one side of the moon????