hi wel come back .............
how r u all...........
just now my exams r finish
i wish all the best to all board student.........
best of luck......
vicky
Friday, March 5, 2010
Wednesday, February 10, 2010
for noble prize
Main article: History of special relativity
His 1905 paper on the electrodynamics of moving bodies introduced his theory of special relativity, which showed that the observed independence of the speed of light on the observer’s state of motion required fundamental changes to the notion of simultaneity. Consequences of this include the time-space frame of a moving body slowing down and contracting (in the direction of motion) relative to the frame of the observer. This paper also argued that the idea of a luminiferous aether – one of the leading theoretical entities in physics at the time – was superfluous.[35] In his paper on mass–energy equivalence, which had previously considered to be distinct concepts, Einstein deduced from his equations of special relativity what has been called the twentieth century’s best-known equation: E = mc2.[36][37] This equation suggests that tiny amounts of mass could be converted into huge amounts of energy and presaged the development of nuclear power.[38] Einstein’s 1905 work on relativity remained controversial for many years, but was accepted by leading physicists, starting with Max Planck.[39][40]
His 1905 paper on the electrodynamics of moving bodies introduced his theory of special relativity, which showed that the observed independence of the speed of light on the observer’s state of motion required fundamental changes to the notion of simultaneity. Consequences of this include the time-space frame of a moving body slowing down and contracting (in the direction of motion) relative to the frame of the observer. This paper also argued that the idea of a luminiferous aether – one of the leading theoretical entities in physics at the time – was superfluous.[35] In his paper on mass–energy equivalence, which had previously considered to be distinct concepts, Einstein deduced from his equations of special relativity what has been called the twentieth century’s best-known equation: E = mc2.[36][37] This equation suggests that tiny amounts of mass could be converted into huge amounts of energy and presaged the development of nuclear power.[38] Einstein’s 1905 work on relativity remained controversial for many years, but was accepted by leading physicists, starting with Max Planck.[39][40]
Thursday, January 14, 2010
TEACHER
Today’s teachers:
• Spend an average of 50 hours per week on all teaching duties, including non-compensated school-related activities such as grading papers, bus duty and club advising.
• Teach an average of 21 pupils (elementary). Secondary schoolteachers have an average class size of 28 pupils.
• Spend an average of $443 per year of their own money to meet the needs of their students. Elementary teachers spend about $498 per year. Secondary teachers spend about $386. Teachers of color spend about $470 per year, more than the $434 spent by white teachers.
• Make an average starting salary of $31,704 per year, not including supplemental pay for extra duties.
• Enter the teaching profession to help shape the next generation. Nearly three out of four (73%) enter teaching because of their desire to work with young people. And nearly seven out of 10 teachers (68%) cite it as the reason for remaining in the profession.
• Nearly half of all public schoolteachers (49%) have been in the classroom 15 years or longer; more than one-third (38%) have 20 or more years of classroom experience.
• More than half (57%) hold at least a master’s degree. The percentage of teachers with a master’s degree has more than doubled since 1961. Less than half (43%) of public schoolteachers hold only a bachelor’s degree-the smallest percentage in 40 years.
• Nine out of 10 teachers (90%) say they spend no time teaching grades or subjects outside their licensed subject area.
• Spend an average of 50 hours per week on all teaching duties, including non-compensated school-related activities such as grading papers, bus duty and club advising.
• Teach an average of 21 pupils (elementary). Secondary schoolteachers have an average class size of 28 pupils.
• Spend an average of $443 per year of their own money to meet the needs of their students. Elementary teachers spend about $498 per year. Secondary teachers spend about $386. Teachers of color spend about $470 per year, more than the $434 spent by white teachers.
• Make an average starting salary of $31,704 per year, not including supplemental pay for extra duties.
• Enter the teaching profession to help shape the next generation. Nearly three out of four (73%) enter teaching because of their desire to work with young people. And nearly seven out of 10 teachers (68%) cite it as the reason for remaining in the profession.
• Nearly half of all public schoolteachers (49%) have been in the classroom 15 years or longer; more than one-third (38%) have 20 or more years of classroom experience.
• More than half (57%) hold at least a master’s degree. The percentage of teachers with a master’s degree has more than doubled since 1961. Less than half (43%) of public schoolteachers hold only a bachelor’s degree-the smallest percentage in 40 years.
• Nine out of 10 teachers (90%) say they spend no time teaching grades or subjects outside their licensed subject area.
# The average human brain has about 100 billion nerve cells.
# Nerve impulses to and from the brain travel as fast as 170 miles (274 km) per hour.
# The thyroid cartilage is more commonly known as the adams apple.
# The only jointless bone in your body is the hyoid bone in your throat
# It's impossible to sneeze with your eyes open.
# Your stomach needs to produce a new layer of mucus every two weeks or it would digest itself.
# It takes the interaction of 72 different muscles to produce human speech.
# The average life of a taste bud is 10 days.
# The average cough comes out of your mouth at 60 miles (96.5 km) per hour.
# Relative to size, the strongest muscle in the body is the tongue.
# Human thigh bones are stronger than concrete.
# When you sneeze, all your bodily functions stop even your heart.
# Babies are born without knee caps. They don't appear until the child reaches 2-6 years of age.
# Children grow faster in the springtime.
# It takes the stomach an hour to break down cow milk.
# Women blink nearly twice as much as men.
# Blondes have more hair than dark-haired people do.
# There are 10 human body parts that are only 3 letters long (eye hip arm leg ear toe jaw rib lip gum).
# If you go blind in one eye you only lose about one fifth of your vision but all your sense of depth.
# The average human head weighs about 8 pounds.
# Our eyes are always the same size from birth, but our nose and ears never stop growing.
# In the average lifetime, a person will walk the equivalent of 5 times around the equator.
# An average human scalp has 100,000 hairs.
# The length of the finger dictates how fast the fingernail grows. Therefore, the nail on your middle finger grows the fastest, and on average, your toenails grow twice as slow as your fingernails.
# The average human blinks their eyes 6,205,000 times each year.
# The entire length of all the eyelashes shed by a human in their life is over 98 feet (30 m).
# Your skull is made up of 29 different bones.
# Your ears and nose continue to grow throughout your entire life.
# After you die, your body starts to dry out creating the illusion that your hair and nails are still growing after death.
# Hair is made from the same substance as fingernails.
# The average surface of the human intestine is 656 square feet (200 m).
# A healthy adult can draw in about 200 to 300 cubic inches (3.3 to 4.9 liters) of air at a single breath, but at rest only about 5% of this volume is used.
# The surface of the human skin is 6.5 square feet (2m).
15 million blood cells are destroyed in the human body every second.
# The pancreas produces Insulin.
# The most sensitive cluster of nerves is at the base of the spine.
# The human body is comprised of 80% water.
# The average human will shed 40 pounds of skin in a lifetime.
# Every year about 98% of the atoms in your body are replaced.
# The human heart creates enough pressure to squirt blood 30 feet (9 m).
# You were born with 300 bones. When you get to be an adult, you have 206.
# Human thighbones are stronger than concrete.
# Every human spent about half an hour as a single cell.
# There are 45 miles (72 km) of nerves in the skin of a human being.
# The average human heart will beat 3,000 million times in its lifetime and pump 48 million gallons of blood.
# Each square inch (2.5 cm) of human skin consists of 20 feet (6 m) of blood vessels.
# During a 24-hour period, the average human will breathe 23,040 times.
# Human blood travels 60,000 miles (96,540 km) per day on its journey through the body.
# Nerve impulses to and from the brain travel as fast as 170 miles (274 km) per hour.
# The thyroid cartilage is more commonly known as the adams apple.
# The only jointless bone in your body is the hyoid bone in your throat
# It's impossible to sneeze with your eyes open.
# Your stomach needs to produce a new layer of mucus every two weeks or it would digest itself.
# It takes the interaction of 72 different muscles to produce human speech.
# The average life of a taste bud is 10 days.
# The average cough comes out of your mouth at 60 miles (96.5 km) per hour.
# Relative to size, the strongest muscle in the body is the tongue.
# Human thigh bones are stronger than concrete.
# When you sneeze, all your bodily functions stop even your heart.
# Babies are born without knee caps. They don't appear until the child reaches 2-6 years of age.
# Children grow faster in the springtime.
# It takes the stomach an hour to break down cow milk.
# Women blink nearly twice as much as men.
# Blondes have more hair than dark-haired people do.
# There are 10 human body parts that are only 3 letters long (eye hip arm leg ear toe jaw rib lip gum).
# If you go blind in one eye you only lose about one fifth of your vision but all your sense of depth.
# The average human head weighs about 8 pounds.
# Our eyes are always the same size from birth, but our nose and ears never stop growing.
# In the average lifetime, a person will walk the equivalent of 5 times around the equator.
# An average human scalp has 100,000 hairs.
# The length of the finger dictates how fast the fingernail grows. Therefore, the nail on your middle finger grows the fastest, and on average, your toenails grow twice as slow as your fingernails.
# The average human blinks their eyes 6,205,000 times each year.
# The entire length of all the eyelashes shed by a human in their life is over 98 feet (30 m).
# Your skull is made up of 29 different bones.
# Your ears and nose continue to grow throughout your entire life.
# After you die, your body starts to dry out creating the illusion that your hair and nails are still growing after death.
# Hair is made from the same substance as fingernails.
# The average surface of the human intestine is 656 square feet (200 m).
# A healthy adult can draw in about 200 to 300 cubic inches (3.3 to 4.9 liters) of air at a single breath, but at rest only about 5% of this volume is used.
# The surface of the human skin is 6.5 square feet (2m).
15 million blood cells are destroyed in the human body every second.
# The pancreas produces Insulin.
# The most sensitive cluster of nerves is at the base of the spine.
# The human body is comprised of 80% water.
# The average human will shed 40 pounds of skin in a lifetime.
# Every year about 98% of the atoms in your body are replaced.
# The human heart creates enough pressure to squirt blood 30 feet (9 m).
# You were born with 300 bones. When you get to be an adult, you have 206.
# Human thighbones are stronger than concrete.
# Every human spent about half an hour as a single cell.
# There are 45 miles (72 km) of nerves in the skin of a human being.
# The average human heart will beat 3,000 million times in its lifetime and pump 48 million gallons of blood.
# Each square inch (2.5 cm) of human skin consists of 20 feet (6 m) of blood vessels.
# During a 24-hour period, the average human will breathe 23,040 times.
# Human blood travels 60,000 miles (96,540 km) per day on its journey through the body.
GLOBAL WARMING.......
Yes. Earth is already showing many signs of worldwide climate change.
• Average temperatures have climbed 1.4 degrees Fahrenheit (0.8 degree Celsius) around the world since 1880, much of this in recent decades, according to NASA's Goddard Institute for Space Studies.
• The rate of warming is increasing. The 20th century's last two decades were the hottest in 400 years and possibly the warmest for several millennia, according to a number of climate studies. And the United Nations' Intergovernmental Panel on Climate Change (IPCC) reports that 11 of the past 12 years are among the dozen warmest since 1850.
• The Arctic is feeling the effects the most. Average temperatures in Alaska, western Canada, and eastern Russia have risen at twice the global average, according to the multinational Arctic Climate Impact Assessment report compiled between 2000 and 2004.
• Arctic ice is rapidly disappearing, and the region may have its first completely ice-free summer by 2040 or earlier. Polar bears and indigenous cultures are already suffering from the sea-ice loss.
• Glaciers and mountain snows are rapidly melting—for example, Montana's Glacier National Park now has only 27 glaciers, versus 150 in 1910. In the Northern Hemisphere, thaws also come a week earlier in spring and freezes begin a week later.
• Coral reefs, which are highly sensitive to small changes in water temperature, suffered the worst bleaching—or die-off in response to stress—ever recorded in 1998, with some areas seeing bleach rates of 70 percent. Experts expect these sorts of events to increase in frequency and intensity in the next 50 years as sea temperatures rise.
• An upsurge in the amount of extreme weather events, such as wildfires, heat waves, and strong tropical storms, is also attributed in part to climate change by some experts.
SAVE EARTH
SAVE US..
• Average temperatures have climbed 1.4 degrees Fahrenheit (0.8 degree Celsius) around the world since 1880, much of this in recent decades, according to NASA's Goddard Institute for Space Studies.
• The rate of warming is increasing. The 20th century's last two decades were the hottest in 400 years and possibly the warmest for several millennia, according to a number of climate studies. And the United Nations' Intergovernmental Panel on Climate Change (IPCC) reports that 11 of the past 12 years are among the dozen warmest since 1850.
• The Arctic is feeling the effects the most. Average temperatures in Alaska, western Canada, and eastern Russia have risen at twice the global average, according to the multinational Arctic Climate Impact Assessment report compiled between 2000 and 2004.
• Arctic ice is rapidly disappearing, and the region may have its first completely ice-free summer by 2040 or earlier. Polar bears and indigenous cultures are already suffering from the sea-ice loss.
• Glaciers and mountain snows are rapidly melting—for example, Montana's Glacier National Park now has only 27 glaciers, versus 150 in 1910. In the Northern Hemisphere, thaws also come a week earlier in spring and freezes begin a week later.
• Coral reefs, which are highly sensitive to small changes in water temperature, suffered the worst bleaching—or die-off in response to stress—ever recorded in 1998, with some areas seeing bleach rates of 70 percent. Experts expect these sorts of events to increase in frequency and intensity in the next 50 years as sea temperatures rise.
• An upsurge in the amount of extreme weather events, such as wildfires, heat waves, and strong tropical storms, is also attributed in part to climate change by some experts.
SAVE EARTH
SAVE US..
WATER
What is water?
One of the ‘Panch – Mahabhoota's, water is an important component of nature. Water in its pure form is tasteless, odourless substance that is essential to all known forms of life and is also known as the Universal Solvent. Without it, life would not exist. Two thirds of earth is covered with water.
Forms of water: -
Water is found in three different forms - liquid, solid or gas, depending on the temperature but it constantly changes from one form to another. Changes in temperature will determine which of these forms predominates in a particular area. [Top]
Some interesting facts about water
* 75% of the earth's surface is covered with water.
* More than 97% of the earth's water is in its oceans.
* The world's average rainfall is about 850 mm.
* Water regulates the Earth's temperature. It also regulates the temperature of the human body, carries nutrients and oxygen to cells, cushions joints, protects organs and tissues, and removes waste.
* Blood in animals and sap in plants is composed mainly of water.
* A dripping tap can waste up to 6 litres of water in a day.
* More than half the creatures on the Earth are found under water.
* Life on earth probably originated in water.
* In the summer our bodies require about 2 litres of water daily. Here is the water content of some foods (approximate) - 95% in tomato, 65% in mango, 95% in watermelon and 87% in pineapple.
THIN THAT HOW WATER IS USEFUL SO MY DEAR ONES PLEASE SAVE WATER..........
One of the ‘Panch – Mahabhoota's, water is an important component of nature. Water in its pure form is tasteless, odourless substance that is essential to all known forms of life and is also known as the Universal Solvent. Without it, life would not exist. Two thirds of earth is covered with water.
Forms of water: -
Water is found in three different forms - liquid, solid or gas, depending on the temperature but it constantly changes from one form to another. Changes in temperature will determine which of these forms predominates in a particular area. [Top]
Some interesting facts about water
* 75% of the earth's surface is covered with water.
* More than 97% of the earth's water is in its oceans.
* The world's average rainfall is about 850 mm.
* Water regulates the Earth's temperature. It also regulates the temperature of the human body, carries nutrients and oxygen to cells, cushions joints, protects organs and tissues, and removes waste.
* Blood in animals and sap in plants is composed mainly of water.
* A dripping tap can waste up to 6 litres of water in a day.
* More than half the creatures on the Earth are found under water.
* Life on earth probably originated in water.
* In the summer our bodies require about 2 litres of water daily. Here is the water content of some foods (approximate) - 95% in tomato, 65% in mango, 95% in watermelon and 87% in pineapple.
THIN THAT HOW WATER IS USEFUL SO MY DEAR ONES PLEASE SAVE WATER..........
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