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Describe the role of army in the early Roman empire.What was the policy of the roman emperors towarsds more expansionof the empire in the first two centuries?

Posted by Shreya Gaur (May 24, 2017 9:49 a.m.) (Question ID: 5453)

  • Answers:
  • Ans. Next to the emperor and the Senate, the other key institution of imperial rule was the army. Romans had a paid professional army where soldiers had to put in a minimum of 25 years of service. The army was the largest single organised body in the empire with 600,000 soldiers in the fourth century. The soldiers would constantly agitate for better wages and service conditions. These agitation often took the form of mutinies.

    The emperor, the aristocracy and the army were the three main ‘players’in the political history of the empire. The success of individual emperors depended on their control of the army, and when the armies were divided, the result usually was civil war. Except for one notorious year (69 CE), when four emperors mounted the throne in quick succession, the first two centuries were free from civil war.

    The emperor Augustus reigned from 27 BC to AD 14 with absolute power. He re-established political and social stability and launched two centuries of prosperity called the Roman Peace (Pax Romana). During the first two centuries Ad the empire flourished and added new territories as ancient Britain, Arabia, and Dacia (present-day Romania). People from the provinces streamed to Rome and became soldiers, bureaucrats, senators, and even emperors. Rome developed into the social, economic, cultural capital of the Mediterranean world. Most emperors ruled sensibly and competently till military and economic disasters brought on the political instability of the 3rd century AD.

     

    Answered by Naveen Sharma (May 24, 2017 11:48 a.m.)
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What is meant by 'principate'in context of the roman empire ?What was the positon of of emperor and Senate in it?

 

Posted by Shreya Gaur (May 24, 2017 9:46 a.m.) (Question ID: 5452)

  • Answers:
  • Ans. The regime established by Augustus, the first emperor, in 27 BCE was called the ‘Principate’. Although Augustus was the sole ruler and the only real source of authority, the fiction was kept alive that he was actually only the ‘leading citizen’ not the absolute ruler. This was done out of respect for the Senate.

    Senate was the body which had controlled Rome earlier, in the days when it was a Republic. The Senate had existed in Rome for centuries, and had been and remained a body representing the aristocracy, that is, the wealthiest families of Roman and later Italian descent mainly landowners.

    Answered by Naveen Sharma (May 24, 2017 11:31 a.m.)
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what are the funcitons and importace of the following

  1. cancelled cheque
  2. pay in slip
  3. Draft slip
  4. cash memo
  5. invoice and bill
  6. voucher
Posted by govind gulia (May 22, 2017 5:18 p.m.) (Question ID: 5432)

Explain details about chacha nehra award

Posted by prabhnoor kaur (May 22, 2017 1:24 p.m.) (Question ID: 5427)

  • Answers:
  • Ans. Objective: The aim is to identify, recognize, nurture and develop the extraordinary talent among the students studying in class VIII onwards in sports and games. This will help in the development of sports activities at the school level and buttress the importance of mental and physical health among the children. The financial support in the form of scholarship will motivate the students to excel in their sports activities.

    Numbers and Value of each scholarship: There are 50 scholarships each year at the rate of Rs.500/- per month to all identified sports talents in class IX-XII based on the performance at national level in various disciplines of CBSE Inter School Sports and Games. Cunently, there are 14 disciplines and number of scholarships available in each discipline is enclosed .

    Duration: The scholarship shall be awarded from the commencement of Class IX (or higher class) and up to class XII (max. four years) subject to fulfillment of following conditions.

    • Visible level of improvement in performance in the skills of the concerned discipline.
    • Passing of each level of classe examination.
    • A candidate selected for the award in Class VIII but has not qualified for admission to Class IX shall not be eligible for the award.
    • A candidate who has been discontinued from the rolls of an institution or has been rusticated shall forfeit the award.
    Answered by Naveen Sharma (May 22, 2017 1:45 p.m.)
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now days 11th class mathatics follow modern abc book so ur solution ncert not sufficient so plz update with modern book solution

Posted by gurpreet singh (May 21, 2017 7:30 a.m.) (Question ID: 5402)

How sometimes technology gives rise to new physics at other times physics generates new technology?? 

Posted by Gourav Pandey (May 20, 2017 3:13 p.m.) (Question ID: 5394)

  • Answers:
  • Ans. The connection between physics, technology and society can be seen in many examples. The discipline of thermodynamics arose from the need to understand and improve the working of heat engines. The steam engine is inseparable from the Industrial Revolution in England in the eighteenth century, which had great impact on the course of human civilisation. Sometimes technology gives rise to new physics; at other times physics generates new technology

    We can understand this by some examples :

    • The wireless communication technology that followed the discovery of the basic laws of electricity and magnetism in the nineteenth century.
       
    • Development of Alternative Energy Resources : A most significant area to which physics has and will contribute is the development of alternative energy resources. The fossil fuels of the earth are ending fast and there is an urgent need to discover new and affordable sources of energy. Considerable progress has already been made in this direction. For example : Conversion of solar energy, geothermal energy into electricity.
       
    • Silicon Chip Technology : Yet another important example of physics giving rise to technology is the silicon chip, that triggered the computer revolution in the last three decades of the twentieth century.
    Answered by Naveen Sharma (May 20, 2017 3:50 p.m.)
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What is equivalent mass?

Posted by Namrta Namrta (May 20, 2017 1:57 p.m.) (Question ID: 5392)

  • Answers:
  • It is defined as the mass of an element/compound/ion which combines or displaces 1 part of hydrogen or 8 parts of oxygen or 35.5 parts of chlorine by mass.

    It is not always possible to apply this classic definition to determine equivalent weights of chemical entities.

    Answered by Payal Singh (May 20, 2017 3:36 p.m.)
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What are the three region of phenomenal progress in physics in the last few centuries?? 

Posted by Gourav Pandey (May 20, 2017 1:08 p.m.) (Question ID: 5391)

All the damages and disasters could be confronted with patience, courage and determination. The write with his family and crew members reached safely to the island only because of these vietues. How far these virtues are essantial for life? discuss.

Posted by dev nanda (May 19, 2017 7:26 p.m.) (Question ID: 5382)

what preparations did the author and his wife make for their round the world sea voyage?

Posted by dev nanda (May 19, 2017 7:23 p.m.) (Question ID: 5381)

  • Answers:
  • Ans. The narrator and his wife wanted to ‘duplicate’ the round—the world voyage made 200 years earlier by Captain James Cook. They had been making formidable preparations for the last 16 years. First of all they got a boat especially designed and professionally built for this purpose. It was a 23 metre, 30 tonne wooden-hulled boat. They tested it for months in the roughest weather. They were both mentally and physically prepared to undertake their exceptionally long and challenging sea-voyage.

    Answered by Naveen Sharma (May 20, 2017 9:10 a.m.)
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Why it is said that science is ever dynamic.  There is no final theory in science and no unquestioned authority among scientist..

Posted by Gourav Pandey (May 19, 2017 4:57 p.m.) (Question ID: 5380)

  • Answers:
  • Ans. The fact that we do not have a final theory in science is testament to our very limited understanding of the world around as well as within us. We do not have a complete sense of apprehension about most (if not all) of the various facets of science, like the following.

    • what causes life?
    • are we alone In space?
    • what is the final number of elements in our universe ?

      Many such questions plague the minds of scientists today and until all such queries are dealt with we will never have a full sense of everything. Now, even if we do happen to find the answers to everything then how do we now that there aren't any other questions left.

      In other words do we even completely know what lies phenomena lies uncovered for us to decipher its mechanism. It seems almost impossible to demystify all of them, let alone the unknown stuff.

      So, it might seem a bit pessimistic but it is almost certain that we will never have a final theory of science there are bound to be a few exceptions, but that is the fun of it all. The world would be a dull place without all its mysteries (for us to solve).
    Answered by Naveen Sharma (May 19, 2017 5:17 p.m.)
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How theory and experiment go hand in hand in physics and help each other's progress

Posted by Gourav Pandey (May 19, 2017 4:52 p.m.) (Question ID: 5379)

  • Answers:
  • Every experiment, calculation, result and prediction starts and ends with theory. Theory and experiment go hand in hand.

    Theory makes predictions and motivate experiments. Experimental results are used to update, improve and validate the framework that scientists work within.

    The models are reassessed under the light of the new data. The new information then comes full circle by helping to determine which experiments are conducted next. By knowing where the gaps in knowledge are – where  theory needs more information – scientists can better decide which questions to ask and which experiments to run next.

    Answered by Payal Singh (May 19, 2017 5:14 p.m.)
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What is scope of physics and exitement??? 

Posted by Gourav Pandey (May 19, 2017 1:13 p.m.) (Question ID: 5376)

What is hypothesis, axiom and models

Posted by Gourav Pandey (May 19, 2017 10:09 a.m.) (Question ID: 5372)

  • Answers:
    • A hypothesis is a supposition without assuming that it is true. It would not fair to ask anybody to prove the universal law of gravitation, because it cannot be proved. It can be verified by experiments.
    • An Axiom is self-evident truth
    •  A Model is a theory proposed to explain observed phenomena.
    Answered by Payal Singh (May 19, 2017 11:04 a.m.)
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What is the difference between accounting and accountancy?

 

Posted by Shagun Vishwakarma (May 19, 2017 8:24 a.m.) (Question ID: 5371)

  • Answers:
  • Accountancy is work done by accountant: the work or profession of an accountant

    Accounting is the activity, practice, or profession of maintaining the business records of a person or organization and preparing forms and reports for tax or other financial purposes.

    Answered by Naveen Sharma (May 19, 2017 9:14 a.m.)
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What is theory? And its example.. 

Posted by Gourav Pandey (May 18, 2017 7:53 p.m.) (Question ID: 5365)

  • Answers:
  • Theory is a set of statements or principles devised to explain a group of facts or phenomena.

    Most theories that are accepted by scientists have been repeatedly tested by experiments and can be used to make predictions about natural phenomena.

    Answered by Payal Singh (May 19, 2017 6:30 a.m.)
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Plants and animals grow by mitotic cell divisions.what differences do they exhibit in their growth?

Posted by Vineet Vikram Panda (May 18, 2017 2:53 p.m.) (Question ID: 5362)

  • Answers:
  • Plants and animals both grow by mitotic divisions but their growth has certain differences:

    • The plants can grow throughout their lifetime, which may be very short for annuals or very long for perennials. Animals grow for a certain period of time till they attain sexual maturity. After being sexually mature they stop growing in size.
    • In perennial plants, there may be alternating periods of vegetative and reproductive growth.
    • Plants have a high power of regeneration while higher animals lack this. True regeneration power is seen only in lower animals like planaria or echinnoderms. Among higher animals only some have the power of regeneration and that too of partial regeneration.
    • For example, lizard can grow its tail back when amputated but not any other body part.
    • In animals growth is diffused, that is growth divisions occur throughout the body, while in plants growth is restricted to localised areas called meristems where the growth divisions occur.
    • Plant cells are pluripotent that they can develop into all other type of plant cells, but in animals this power is limited to the stem cells only.
    Answered by Payal Singh (May 18, 2017 4:09 p.m.)
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Tell me any project based on the laws of motion

 

Posted by manoj ramna (May 17, 2017 7:15 p.m.) (Question ID: 5355)

Find the volume of ammonia gas at NTP

Posted by Lokendra Singh Umath (May 17, 2017 6:22 p.m.) (Question ID: 5354)

differences between pure substance and mixture?

Posted by Sarthak Chauhan (May 17, 2017 5:34 p.m.) (Question ID: 5353)

  • Answers:
  • Ans.

    1. Pure Substance has the same composition and properties throughout Whereas Mixture is the combination of two or more pure substances where each substance retains its own identity.
    2. Pure substances cannot be separated into any other kinds of matter, while a mixture is a combination of two or more pure substances.
    3. A pure substance has constant physical and chemical properties, while mixtures have varying physical and chemical properties (i.e., boiling point and melting point).
    4. A pure substance is pure, while a mixture is impure.
    5. e.g: Pure water is a pure substance. It consist of only water molecules While e.g: Alcohol-water mixture, both co-exist together.
    Answered by Naveen Sharma (May 17, 2017 6 p.m.)
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What were the challenges of faced by people of mesopotamia

Posted by Mehak Dixit (May 16, 2017 8:59 p.m.) (Question ID: 5339)

  • Answers:
  • Ans. There were always challenges faced by Mesopotamian, but this resulted in them working together. Some problems are stated below:

    • Salinization occurred after many years of irrigation. Salinization is the buildup of salt in a certain area. The salt reduced the fertility of the soil, making it impossible to grow any crops.
    • Water storage was another challenge Mesopotamians faced. Water was needed in the winter to keep the crops alive, but the Tigris and Euphrates rivers were frozen. This was a major problem because the fields would dry out, which would result in the harvest being ruined.
    • The different canals always needed repairing because if there was a small crack, something could go wrong.
    Answered by Naveen Sharma (May 17, 2017 9:45 a.m.)
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Write a note on religious life of Mesopotamia. 

 

Posted by Mehak Dixit (May 16, 2017 8:58 p.m.) (Question ID: 5338)

  • Answers:
  • Ans.The ancient Mesopotamians worshipped hundreds of gods. They worshipped them every day. Each god had a job to do. Each city had its own special god to watch over the city. Each profession had a god to watch over the people who worked in that profession like builders and fishermen.

    To the Sumerians, each person had a god of their own, who looked after them. Their own special god talked to other gods on their behalf. Their personal god received a great deal of their worship time and attention. But no one god was more important than another.

    The Babylonians and Assyrians believed in nearly all the Sumerian gods, plus more gods that each added. Unlike the ancient Sumerians, they believed some gods were more powerful than others, gods like the god of the sky, the sun, the air, and the crops. To the Babylonians, Marduk was the most powerful god. To the Assyrians, Ashur was the most powerful god.

    The Sumerians, and later on, the Babylonians (southern Mesopotamia) and the Assyrians (northern Mesopotamia) all believed that everything good and bad that happened to them was the result of their gods pleasure or displeasure. They spent a great deal of time trying to make their gods happy.Their gods were not often happy. That's why Mesopotamian gods are sometimes referred to as the gloomy gods of ancient Mesopotamia

    Answered by Naveen Sharma (May 17, 2017 9:47 a.m.)
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Find no. of moles in 44.8 litres of CO2 at STP

Posted by Nikhil Malik (May 16, 2017 6:20 p.m.) (Question ID: 5335)

  • Answers:
  • At STP, one mole of gas has a volume of 22.4 liters.

    Given that there are 44.8 liters in this problem, which is twice as much as 22.4, there must be 2.00 moles of Carbon Dioxide COgas.

    Answered by Payal Singh (May 16, 2017 8:11 p.m.)
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Calculate the no. of atoms of the constituent elements in 53g of Na2CO3

Posted by Nikhil Malik (May 16, 2017 6:06 p.m.) (Question ID: 5334)

  • Answers:
  • Molecular mass of Na2CO3 = ( 2 × 23 ) + 12 + (3 × 16) = 46 + 12 + 48 = 106 

    Given mass of Na2CO3 = 53 g

    106 g of Na2COContain = 1 mol

    53 g of Na2CO3 Contain = {tex}{53\over 106} = {1\over 2}{/tex} mol  

     

    No of atoms of Na = {tex}{1\over 2}\times 2 \times 6.022 \times 10^{23}{/tex}{tex} 6.022 \times 10^{23}{/tex}

    No of atoms of C = {tex}{1\over 2}\times 6.022 \times 10^{23}{/tex}

    {tex}3.011 \times 10^{23}{/tex}

    No of atoms of O = {tex}{1\over 2}\times 3 \times 6.022 \times 10^{23}{/tex}{tex}9.033\times 10^{23}{/tex}

     

    Answered by Payal Singh (May 19, 2017 7:34 a.m.)
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Why the discovery of tut,s history all information give the details of the searches done on the life of the test?

 

Posted by Harinder Singh Thind (May 16, 2017 4:58 p.m.) (Question ID: 5332)

Why metals are melleable and ductile?give sutaible reason.

Posted by Vanshika Kalra (May 16, 2017 1:04 p.m.) (Question ID: 5326)

  • Answers:
  • Metals are malleable and ductile because they are made of hexagonal and cubic packed structures that can be moved by applying force to them. When force is applied, the atoms slide from one plane past atoms in a different plane.

    Answered by Payal Singh (May 16, 2017 2:36 p.m.)
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Why is role and status known as twin concept? 

 

Posted by Pavithra Veerapathiran (May 15, 2017 9:41 a.m.) (Question ID: 5314)

  1. How elastic spring forces arise?
Posted by lochan soni (May 14, 2017 11:29 a.m.) (Question ID: 5305)

  • Answers:
  • The elastic spring force arise due to the net attraction/repulsion between the neighboring atoms of the spring when the spring is elongated/compressed.

    This net attraction/ repulsion can be traced to the sum of electric forces between the charged constituents of the atoms.

    Answered by Payal Singh (May 15, 2017 7:46 a.m.)
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  1. Give a method to measure size of the atom using Avogadro’s hypothesis?

 

Posted by lochan soni (May 14, 2017 11:28 a.m.) (Question ID: 5304)

  • Answers:
  • By Avogadro's hypothesis, the actual volume occupied by the atoms in one gram of a substance is 2/3rd of the volume occupied by 1 gram of the substance.

    Let us consider a sample of a substance of mass m and volume V. If M is its molecular weight and Avogadro number is N, then

    Number of atoms in the given sample = {tex}{N\over M}× m = {Nm\over M}{/tex}

    let each atom is a sphere of radius r..

    So 

    Actual volume of the atoms in the given sample = {tex}{Nm\over M}×{4\over 3}\pi r^3{/tex}

     By Avogadro's hypothesis

    {tex}{Nm\over M}×{4\over 3}\pi r^3 = {2\over 3}V{/tex}

    If {tex}\rho{/tex} is density of substance . Then

    {tex}\rho = {m\over V} \\=> V = {m\over \rho}{/tex}

    {tex}=> {Nm\over M}×{4\over 3}\pi r^3 = {2\over 3}{m\over \rho}{/tex}

    {tex}r = \left ({M\over 2 \pi N\rho }\right )^{1\over 3}{/tex}

    Knowing values of M,N and {tex}\rho{/tex}

    We can find radius 

    Answered by Payal Singh (May 19, 2017 7:48 a.m.)
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  1. The diameter of a thin wire measured with screw gauge, the value are 2.04mm,2.06mm,2.06mm,2.08mm,2.07mm,2.05mm. find the average diameter of wire, absolute error, mean absolute error, relative error, and percentage error.
Posted by lochan soni (May 14, 2017 11:27 a.m.) (Question ID: 5303)

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