INDIAN STATES ON INTERNATIONAL BOUNDARIES
INDIAN STATES ON INTERNATIONAL BOUNDARIES
- Bordering Pakistan :
- Bordering China :
- Bordering Nepal :
- Bordering Bangladesh :
- Bordering Bhutan :
- Bordering Myanmar :
- Bordering Afghanistan :
Science Question 10
QUESTION
What
is the difference in energy content of raw and boiled rice?
ANSWER:
The energy content of raw
rice is 3620 cal/kg with 12 per cent water content whereas that of boiled
(cooked) rice is 1098 cal/kg with 73 per cent water content. Another variety is
known as parboiled rice. Parboiling is a hydrothermal treatment followed by
drying before milling for the production of milled parboiled grain.
During parboiling, the B vitamins
and minerals from hulls, bran and germ will be leached into endosperm and hence
loss during polishing is minimised. The energy content of parboiled raw rice is
3703 cal/kg with 10 per cent water content whereas that of boiled (cooked)
parboiled rice is 1057 cal/kg with 73 per cent water content .
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Science Question 9
QUESTION:
Why are all the planets in the universe spherical in shape?
ANSWER:
Dip a finger into a bowl of water and then take it out. Now watch the drop of water as it trickles down the finger and drops down. You will notice that the drop of water acquires a spherical shape. Place a drop of mercury on a smooth surface. It attains a spherical shape, this phenomena is due to the cohesive force (force of attraction between the molecules of same element) which brings the molecules closer.
But then why does it take a spherical shape, why not a cubic one? This is because, out of all multidimensional geometric figures, sphere has the least surface area. Thus all particles try their best to attain a spherical shape in order to reduce their surface area. It is for the same reason that when you pour any liquid in space they attain a spherical shape. But this is not the case with solids since their molecules are compactly packed and cannot be displaced. When a new star is born the gas clouds around it condenses to form planets. The dense gas passes through three states, the gaseous state, the molten liquid state and finally the rigid solid state. When a planet is in the first two states it attains a spherical structure due to the cohesive force as mentioned in the illustration. Later the molten planet solidifies into a rigid planet like Earth.
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Why are all the planets in the universe spherical in shape?
ANSWER:
Dip a finger into a bowl of water and then take it out. Now watch the drop of water as it trickles down the finger and drops down. You will notice that the drop of water acquires a spherical shape. Place a drop of mercury on a smooth surface. It attains a spherical shape, this phenomena is due to the cohesive force (force of attraction between the molecules of same element) which brings the molecules closer.
But then why does it take a spherical shape, why not a cubic one? This is because, out of all multidimensional geometric figures, sphere has the least surface area. Thus all particles try their best to attain a spherical shape in order to reduce their surface area. It is for the same reason that when you pour any liquid in space they attain a spherical shape. But this is not the case with solids since their molecules are compactly packed and cannot be displaced. When a new star is born the gas clouds around it condenses to form planets. The dense gas passes through three states, the gaseous state, the molten liquid state and finally the rigid solid state. When a planet is in the first two states it attains a spherical structure due to the cohesive force as mentioned in the illustration. Later the molten planet solidifies into a rigid planet like Earth.
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Science Question 8
QUESTION:
Why is the voltage of electric power always given in multiples of 11 such as
110V, 220V, 440V & 11 KV?
ANSWER:
The electric power in use
today, is of A.C. (Alternating Current) in nature. But, before the advent of AC
power generating electrical machines, the sources of electricity were primary
cells whose power is D.C. (Direct Current) in nature.
So, when machines were developed
to produce AC electricity, their capacity was to be compared with the already
available DC electricity. Thus a value called the RMS (Root Mean Square) value
for the AC electricity was coined. This RMS value equated the power of the AC
electricity with the DC electricity. This RMS value is the effective or virtual
value of the AC electricity. It is of prime importance practically, because all
general-purpose electrical indicating instruments record only the RMS value of
their respective parameters.RMS value of AC electricity could be calculated
either by the mid-ordinate method or by the analytical method and is equal to
0.707 x Max. value of measuring quantity. But, it is easier to calculate the
average value or the arithmetic mean value of the AC electricity than to
calculate the RMS value and the average value is equal to 0.637 x max. value of
measuring quantityA factor could be calculated to relate the RMS value and the
Average value. That is the Form Factor, which is equal to:
Form Factor = RMS Value/ Average
value = 0.707 x Max Value/ 0.637 x Max. Value = 1.11
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Madeeasy Notes SET 3
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Signals & Systems
Analog Electronics
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Signals & Systems
Analog Electronics
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