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In all these stages and in all these civilizations ,we were dependent on empirical knowledge. We observed ,we learnt and we used it. We never tried to theorize.

In Greek Era, for the first time why, how and whereof questions were raised regarding events, processes and systems. Socrates played the most crucial role in questioning the prevailing dogmas.

In the Greek Era, the prevailing World View was the Ptolemaic World View where our Earth was at the centre of the Universe known as Geo-centric Model and where heart was at the centre of the Human Body known as Cardio-centric Model .

The Greek Era was followed by the Roman Era. King Constantine in 300AD proclaimed Christanity as the State Religion and almost whole of Europe gradually converted to Christanity. On the other hand in 600AD in Arab countries there was the dawn of Islam and Prophet Muhammad was proclaimed 40th Prophet and the last Prophet. Islam spread to whole of Europe where a new resistance started against the spread of Islam in form of Christian Crusades. By 1200AD crusaders managed to push back the Islamic forces back to Arabian Peninsula. Until 15th century Europe remained divided. During this period barbarian Goths, Vandals and Huns swept down on Europe from North and East. They destroyed many fine buildings and works of art that had existed during Roman times. This period was referred to as the dark ages of Medieval Era.During this period knowledge survived only in Monastaries. Progress in Science and Technology came to a stand still.. Whole of Europe was plunged in the dark ages of the Early Medieval Era.

14 th Century saw the dawn of the Age of Reasoning. This was the Age of Voltaire.

14 th Century also saw the Gutenberg Revolution, the second Information Revolution.***. This century witnessed the Protestant Movement and subsequent rise of Martin Luther as the most significant dissident within the Christian Religion.

The Protestant Movement signaled the Age of Renaissance. The Industrial Revolution of 18 th Century catalyzed the Bourgeoisie Democratic Revolution which swept through Europe, USA and Japan. This Revolutionary Movement overthrew the Monarchies and Oligarchies and established the rule of Pluralistic Democracy in the leadership of Bourgeoisie Party. In France this Party was known as Jacobins, in USA it was known as Democratic Party, in Germany it was under the leadership of Junkers and in Japan it was under the leadership of Meiji Oligarchs.

[* Benjamin Franklin made a systematic and scientific investigation of lightening during the second half of 18 th Century through his legendary ‘Key and Kite’experiment. In a Pennsylvania thunderstorm in 1752, he flew a kite with a key tied to the string just beside the kite. The electric charges induced on the thunderclouds were attracted by the key and provided a short circuit path to the ground through the body of Franklin. In the process he received electric shocks which could have proved fatal. But this electric shock established the nature of electricity as well as the charge of electricity which in this case was negative. Thus electricity’s discovery was made and this was to play the same role in human society as the discovery of fire was to play in the hominid society when hominid society was fruit and root gatherer as well as scavenger about a million years before.

Questions & Answers

can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
Commplementary angles
Idrissa Reply
im all ears I need to learn
right! what he said ⤴⤴⤴
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
im not good at math so would this help me
Rachael Reply
I'm not good at math so would you help me
what is the problem that i will help you to self with?
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
what is system testing
what is the application of nanotechnology?
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
anybody can imagine what will be happen after 100 years from now in nano tech world
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Solid state physics and devices-the harbinger of third wave of civilization. OpenStax CNX. Sep 15, 2014 Download for free at http://legacy.cnx.org/content/col11170/1.89
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