Science

QUESTIONS:-

noreply@blogger.com (Rajendra S P Negi) — Wed, 14 Dec 2011 22:13:00 +0000

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1. How much skin do we have?
2. Do fish go to sleep?
3. Who was first person in space?

4. Were Dinosaurs vegetarian?

6. How many eggs does a woman have?

7. What is blood?

8. Is the food digest in stomach?

9. What is the basis of Mendeleev’s periodic law?

10. Relax and enjoy this?

11. What is an orbit?

12. What is inertia?

13. Who was galileo?

14. Why is it important to chew food?
15. Size Of Universe?
16. How was SUN created?

Science of Money

noreply@blogger.com (Rajendra S P Negi) — Tue, 05 Apr 2011 18:47:00 +0000

Money has always been around us in one form or another. Although it is true that the ancients didn’t have printed notes like we have but the fact is undeniable that they were involved in commerce. In other words, they had a sense of money. Moreover, because trading among humans is so old that it would be impossible to find out the person who could have proposed the concept of money.

The Chinese, one of the oldest civilizations, were the first to introduce paper money similar to our bank notes back in the 7th century. They called their bank notes ‘jaozi’. Jaozi didn’t immediately replace bartering but they were used alongside other commodities. Coins of gold and silver were used before this event but they were more like commodity money (like cows, pigs etc.) and less like the money of today in essence. The royal stamps on the coins ensured purity of the coins.

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How much skin do we have?

noreply@blogger.com (Rajendra S P Negi) — Sat, 02 Apr 2011 20:23:00 +0000

An adult has more than 2 square metres (20 square feet) of skin. This is almost the size of a bed sheet!

Do fish go to sleep?

noreply@blogger.com (Rajendra S P Negi) — Sat, 02 Apr 2011 20:19:00 +0000

Some fish enjoy a nap.All members of the parrotfish family sleep at night. They make a
bed out of their own saliva that covers them fully. Then they go to sleep on the sea floor. But most other types of fish continue to swim slowly even when they are resting, so it’s difficult to tell if they have gone to sleep.

Who was the first person in space?

noreply@blogger.com (Rajendra S P Negi) — Sat, 02 Apr 2011 20:16:00 +0000

On 12 April 1961, Russian cosmonaut Yuri Gagarin was the first person to travel in space, aboard the spacecraft Vostok 1.Gagarin orbited the Earth once on this historic flight, which lasted 1 hour and 48 minutes.

How was the Sun created?

noreply@blogger.com (Rajendra S P Negi) — Sat, 02 Apr 2011 20:01:00 +0000

Before it was formed, the Sun and the rest of the solar system was a huge mass of
hot gas and dust called a solar nebula. This nebula spun faster and faster until the clouds of gases, dust and ice particles clumped together and exploded, forming the sun.

Size of Universe?

noreply@blogger.com (Rajendra S P Negi) — Fri, 18 Feb 2011 14:57:00 +0000

There are at least 100 billion galaxies that we know of. This number keeps growing as better telescopes are developed and we see more and more galaxies. On top of that, the galaxies are moving away from each other, causing the universe to expand. Some scientists believe that the universe will never stop expanding, while others think that one day it will begin to shrink until it becomes a fireball again.

noreply@blogger.com (Rajendra S P Negi) — Mon, 14 Feb 2011 17:24:00 +0000

What is blood?
were Dinosaurs vegetarian?

Were dinosaurs vegetarian?

noreply@blogger.com (Rajendra S P Negi) — Sat, 12 Feb 2011 19:35:00 +0000

Despite their reputation as violent monsters, 65 per cent of the dinosaurs were vegetarian. They lived around the same time as the first flowering plants were developing on the Earth. But most of the plants..
around them were like ferns. Some types of dinosaurs, such as the turanoceratops, had special parrot-like beaks with which they could bite off the needles from ferns.

How many eggs does a woman have?

noreply@blogger.com (Rajendra S P Negi) — Sat, 12 Feb 2011 19:30:00 +0000

The ovaries hold thousands of eggs. These are released once a month for about 30 years during menstruation. When a woman is between 45–50, menstruation..
stops and eggs are no longer released. This change is called the
menopause.

What is blood?

noreply@blogger.com (Rajendra S P Negi) — Sat, 12 Feb 2011 19:09:00 +0000

Blood is sometimes called ‘the river of life’ and it accounts for about eight per cent of our weight. Blood contains two types of blood cells. Red blood cells give blood its colour and also help....

to carry carbon dioxide and oxygen to and from the lungs. White blood cells help to fight infection and they also help the blood to clot if we are wounded. The red and white cells are suspended in a fluid called plasma.
Food is also distributed in the body by blood.

Is the food digested in the stomach?

noreply@blogger.com (Rajendra S P Negi) — Sat, 12 Feb 2011 19:05:00 +0000

The stomach walls churn and break
the food into tinier pieces. The acid in the
stomach kills harmful bacteria, while other
chemicals speed up digestion. Water, sugar
and salt are..
filtered into the blood through
the stomach walls. The undigested food,
called chyme, passes into the small intestine
for further digestion. The food is completely
digested in the small intestine. Small finger like
projections, or villi, in the small intestine
pass the nutrients into the bloodstream.

Indian Accounting: AS-16 BORROWING COSTS

noreply@blogger.com (Rajendra S P Negi) — Thu, 02 Dec 2010 19:41:00 +0000

Indian Accounting: AS-16 BORROWING COSTS

What is the basis of Mendeleev’s periodic law?

noreply@blogger.com (Rajendra S P Negi) — Tue, 13 Apr 2010 06:48:00 +0000

Mendeleev's Periodic table simplified the study of elements. As the arrangements of elements showing similar properties were classified into groups, it was very useful in studying and remembering the properties of a large number of elements in a systematic way.

Prediction of New Elements

Based on the positions in the periodic table, Mendeleev could predict the properties of some undiscovered elements. He left three blanks for elements that were not discovered at that time. He was able to predict the properties of these unknown elements more or less accurately. He named them eka-boron, eka-aluminium and eka-silicon. He named them so, as they were just below boron, aluminium and silicon in the respective sub-groups. Eka-boron was later named as...
scandium, eka-aluminium as gallium and eka-silicon as germanium.

A Comparative Study of the Properties of Elements Predicted and Later Discovered

Property	Eka-boron	Scandium
Atomic weight	44	43.79
Oxide	Eb₂O₃	Sc₂O₃
Specific gravity	3.5	3.864
Sulphate	Eb₂(SO₄)₃	Sc₂(SO₄)₃
Property	Eka-aluminium	Gallium
Atomic weight	68	69.9
Specific gravity	5.9	5.94
Melting point	Low	303.15
Formula of oxide	Ea₂O₃	Ga₂O₃
Solubility in acid and alkali	Dissolves slowly in both acid and alkali	Dissolves slowly in both acid and alkali
Property	Eka-silicon	Germanium
Atomic weight	72	72.32
Specific gravity	5.5	5.47
Melting point	High	958
Valency	4	4
Reaction with acid and alkali	Slightly attacked by acids, resists attack by alkali	Dissolves neither by hydrochloric acid nor sodium hydroxide

Correction of Atomic Masses

Mendeleev's periodic table helped in correcting the atomic masses of some of the elements, based on their positions in the periodic table. For example, atomic mass of beryllium was corrected from 13.5 to 9.0. Atomic masses of indium, gold and platinum were also corrected.

Mendeleev's Periodic Table

Period	Group I	Group II	Group III	Group IV	Group V	Group VI	Group VII	Group VIII
1	H=1	-	-	-	-	-	-	-
2	Li=7	Be=9	B=11	C=12	N=14	O=16	F=19	-
3	Na= 23	Mg= 24	Al= 27.3	Si=28	P=31	S=32	Cl=35.5
4 First series	K=39	Ca=40	Sc=45	Ti=48	V=51	Cr=52	Mn=55	Fe=56 Co=58.9 Ni=58.7
4 second series	Cu =63	Zn= 65	Ga=70	Ge= 73	As=75	Se=79	Br=80	-
5 First series	Rb= 85	Sr=87	Y=89	Zr=91	Nb=93	Mo=96	Tc=99	Ru=102 Rh=103 Pd=106
5 second series	Ag= 108	Cd= 112	In= 115	Sn= 118	Sb=122	Te=128	I=127	-
6 First series	Cs= 133	Ba= 137	La= 138	Hf= 178	Ta=181	W=184	-	Os=190 Ir=193 Pd=106
6 second series	Au= 197	Hg= 200	Ti= 204	Pb= 207	Bi=208		-

Amazing Photos

noreply@blogger.com (Rajendra S P Negi) — Mon, 06 Jul 2009 11:46:00 +0000

Stare on black point for few seconds and you will see that brown part around this point is getting lighter.

How is it possible?

What do you see?

If you liked these photos then comment on this and I will post more amazing photos like these..

What is an orbit?

noreply@blogger.com (Rajendra S P Negi) — Tue, 23 Jun 2009 18:02:00 +0000

A : Artificial satellites are given a definite path around the Earth. The Earth’s gravity holds the satellite in a path called an orbit. There are several kinds of orbits. One is Leo or Low Earth Orbit. A Leo satellite circles 160–480 kilometres (100–300 miles) above the Earth’s surface. It has to travel very fast to avoid being sucked back to the Earth by gravity. Leos travel at about 28,164 kilometres per hour (17,500 miles per hour) and can circle the Earth in less than two hours. Medium Earth Orbit or Meo satellites are placed 9,656–19,312 kilometres (6,000–12,000 miles) above the Earth. They are often used for communications of all kinds. Geos or Geostationary Earth Orbit satellites circle the Earth in 24 hours, which is the time the
Earth takes to rotate once on its axis. So they seem to be fixed above one spot on the Earth.
Geo satellites orbit 35,859 kilometres (22,282miles) above the Earth. They carry television
signals across the world, telephone calls between countries and internet messages. They also help predict the weather.

What is inertia?

noreply@blogger.com (Rajendra S P Negi) — Tue, 23 Jun 2009 17:57:00 +0000

A : An object tends to carry on doing the same thing, whether it is at rest or moving,unless a force acts on it to change that. This is called inertia. Your pencil box lies on the table until you push it. This state of rest is called inertia of rest. Then, with the force of your finger, it moves on until it meets another force that stops it. This movement is called inertia of motion. If the force you push the
object with is too much, it will go beyond the point where you wanted it to go.

What is inertia?

noreply@blogger.com (Rajendra S P Negi) — Tue, 23 Jun 2009 17:57:00 +0000

Who was galileo?

noreply@blogger.com (Rajendra S P Negi) — Tue, 23 Jun 2009 17:43:00 +0000

A : Galileo Galilei was an Italian astronomer and physicist who supported the theories of Copernicus. He improved the telescope and made so many new observations about the planets that he has been declared the father of science. He discovered the four biggest moons of Jupiter. However, during his lifetime, Galileo struggled against the Roman Catholic Church. The Church banned his work on the planets because it was so different from what the scriptures said. He was put under house arrest for insisting that the Sun is at the centre of the solar system and remains in one place. The Church forced him to change his views in public, but he held on to them in private.

Who was galileo?

noreply@blogger.com (Rajendra S P Negi) — Tue, 23 Jun 2009 17:43:00 +0000

What is a solar eclipse?

noreply@blogger.com (Rajendra S P Negi) — Tue, 23 Jun 2009 17:40:00 +0000

A : A solar eclipse occurs when the Moon comes between the Sun and the Earth,blocking the Sun from our view. In a total solar eclipse, the Moon blocks out the Sun from our view completely. In a partial eclipse, however, a part of the Sun is visible. During an annular eclipse, we can see a small ring of the Sun glowing around the Moon. When the Moon is nearer to the Earth it appears larger
and therefore covers the Sun completely, although it is actually much smaller than the Sun. However, in an annular eclipse the Moon is too far away from the Earth to block the Sun out totally and therefore a ring of sunlight is seen.

What is a black hole?

noreply@blogger.com (Rajendra S P Negi) — Tue, 23 Jun 2009 17:36:00 +0000

A : Black holes are extremely compact space objects that were once massive stars. Sometimes
a huge star begins to shrink until it is smaller than an atom. This is called a black hole. The
centre of the black hole is called ‘singularity’.The gravity near this point is so strong that any
object that gets too close to the black hole is pulled into it. Even light gets sucked into it,which is why we can’t see a black hole. Scientists use special instruments to detect a black hole’s presence. They examine the effects it has on the objects near it.

What are reproductive organs?

noreply@blogger.com (Rajendra S P Negi) — Mon, 22 Jun 2009 18:13:00 +0000

A : Male reproductive organs are outside the body. They include the penis, and a pair of testes inside a cover called a scrotum. The testes produce sperm and the male hormone testosterone. During sexual intercourse, sperm travels down the penis. The female reproductive system is also in
the pelvic region, but it is inside the body. It is made up of two ovaries, a uterus, two fallopian tubes, the cervix and the vagina. The ovaries produce a hormone called oestrogen. They also make eggs to join with the sperm to produce a baby.

What is the brain?

noreply@blogger.com (Rajendra S P Negi) — Mon, 22 Jun 2009 17:47:00 +0000

A : The brain is an organ inside the skull.It forms only about two per cent of our body weight, but it controls our feelings, movement, skills and every function necessary to live. The human brain is divided into three major parts; the cerebrum, the cerebellum,and the brain stem. The cerebrum gives us intelligence. It makes up 85 per cent of the brain and operates voluntary muscles that we have control over. The cerebrum is the area of the brain that allows us to dance, jump or solve puzzles. It also stores information, which we call memory. The cerebellum or ‘little brain’ is below the cerebrum and is just one-eighth of the size of it. The cerebellum controls balance and tells the muscles how to move. The brainstem connects the rest of the brain to the spinal cord, which runs down the neck and back.The brainstem controls involuntary muscles that work without us thinking about it, like the heart, the lungs and the stomach.

What is the brain?

noreply@blogger.com (Rajendra S P Negi) — Mon, 22 Jun 2009 17:47:00 +0000

A : The brain is an organ inside the skull.It forms only about two per cent of our body weight, but it controls our feelings, movement, skills and every function necessary to live. The human brain is divided into three major parts; the cerebrum, the cerebellum,and the brainstem. The cerebrum gives us
intelligence. It makes up 85 per cent of the
brain and operates voluntary muscles that we
have control over. The cerebrum is the area
of the brain that allows us to dance, jump
or solve puzzles. It also stores information,
which we call memory. The cerebellum or
‘little brain’ is below the cerebrum and is
just one-eighth of the size of it. The
cerebellum controls balance and tells the
muscles how to move. The brainstem
connects the rest of the brain to the spinal
cord, which runs down the neck and back.
The brainstem controls involuntary muscles
that work without us thinking about it, like
the heart, the lungs and the stomach.