Science

Thursday, November 30, 2023

Class 10 Social Science History -Print Culture and the Modern World Important Questions with Answers

 Print Culture and the Modern World


1. Where did the print technology first develop in the World? 

 Answer: The earliest kind of print technology was first developed in China, Japan, and Korea. This was a system of hand printing.

2. How were books printed in China since AD 594?

 Answer: • The earlier kind of Print technology was a system of Hand printing.

 • From AD 594 onwards, books in China were printed by rubbing paper also invented there against the inked surface of woodblocks. As both sides of the thin, porous sheet could not be printed, the traditional Chinese ‘accordion book’ was folded and stitched at the side. 

 • Superbly skilled craftsmen could duplicate, with remarkable accuracy, the beauty of Calligraphy (an art of beautiful and stylized writing.)

3. “The imperial state in China was the major producer of printed material.” Support this statement with examples.

                                                      OR

“From the 16th century the volume of print increased in China”. State reasons. 

Answer: The imperial State in China, was the major producer of printed material because :

a) China had a bureaucratic system which conducted civil services examinations to recruit its personnel.
(b) Textbooks for this examination were printed in large number, under the sponsorship of the imperial state.
(c) From the sixteenth century, the number of candidates, who were taking , examination, went up. It led to increased volume of printed material.

4. Describe any five uses of print culture in the 17th century China.

Answer: (i) By the 17th century, as urban culture bloomed in China, the uses of print diversified. 

(ii) Print was no longer used just by scholar-officials. 

(iii) Merchants used print in their everyday life, as they collected trade information.

(iv) The new readership preferred fictional narratives, poetry, autobiographies, anthologies of literary masterpieces and romantic plays. 

(v) Rich women began to read and many women began publishing their Poetry and plays. (vi) Wives of scholar-officials published their works and courtsmen wrote about their lives.

5. Mention any three reasons for the limited circulation of manuscripts in Europe before Marco Polo introduced the printing technology.

Answer : (i) Handwritten manuscript production could not keep up with the ever-increasing demand for books.

(ii) Copying was a costly, time-consuming, and difficult process.
(iii) The manuscripts were fragile, difficult to handle, and difficult to transport or read.

6.What is manuscript? Mention any two limitations of it during nineteenth century. 

                                            OR

Why were manuscripts not widely used in everyday life? Give three reasons.

Answer : Manuscripts were documents or books written by hand.

 They were not used widely because : 

(i) They could not satisfy the ever-increasing demand for books. 

(ii) They were expensive as copying was an expensive, laborious and time-consuming business. 

(iii) Manuscripts were fragile, awkward to handle and could not be carried around or read easily. 

(iv) Their circulation was limited.

7. How had the earliest printing technology developed in the world? Explain with example. 

Answer : (i) The earliest kind of print technology was developed in China, Japan and Korea. In China woodblock were used for hand printing.

 (ii) Upto the 6th century print was used only by the scholar officials but later it became common.

(iii) The Buddhist missionaries introduced hand printing technology from China to Japan. 

(iv) It was Marco Polo, a great explorer, who brought printing knowledge of woodblock from China to Italy.


8. How did print help to spread new ideas that led to the reformation in Europe?

Answer : (i) In 1517, the religious reformer Martin Luther wrote 'Ninety Five Theses' criticising many of the practices and rituals of the Roman Catholic Church.

 (ii) Due to writings of Martin Luther, the church got divided and a new protestant reformation had started.

 (iii) Several scholars, in act think that print brought about a new intellectual atmosphere and helped spread the new ideas that led to reformation.

9. Explain the reasons favouring shift from hand printing to mechanical printing in China.

Answer : The reasons favouring shift from hand printing to mechanical printing in China are:

(i) Textbooks of Civil Service Examination were printed in vast numbers under the sponsorship of the imperial state. From the sixteenth century, the number of examination candidates went up and that increased the volume of print. 

(ii) By the seventeenth century, print was no longer used just by scholar officials. Merchants used print in their everyday life, as they collected trade information. 

(iii) Reading increasingly became a leisure activity. The new readership preferred fictional narratives, poetry, autobiographies, anthologies of literary masterpieces, and romantic Plays. (iv) Rich women began to read, and many women began publishing their Poetry and plays. Wives of scholar-officials published their works and courtesans wrote about their lives. The new reading culture was accompanied by a new technology.

(v) Western printing techniques and mechanical presses were imported in China and Shanghai became the new hub of the new print culture.

10. "The shift from hand printing to mechanical printing led to the print revolution in Europe. Explain the statement with examples.

Answer : (i) Between 1450 and 1550, printing presses were set up in most countries of Europe. Printers from Germany travelled to other countries seeking work helping start new presses. As the number of printing presses grew, book production boomed.

(ii) The second half of the 15th century saw 20 million copies of printed books flooding the markets in Europe. The number increased to 200 million copies in 16th century. This shift from hand printing to mechanical printing led to the print revolution.

(iii) It transformed the lives of people by opening the door of knowledge to a vast literate population. 

 (iv) It encouraged debates and discussions on written texts and encouraged freedom of opinion on important issues.

11. "Printing brought the reading public and hearing public closer." Substantiate the statement with an appropriate argument. 

or

How did a new reading public emerge with the printing press? Explain 

Answer : (i) Printing reduced the cost of books. The time and labor to produce each book came down. Multiple copies could be produced easily.  

(ii) Books flooded the market, reaching out to an ever-growing readership. Common people could not read books earlier, only the elite could. Common people heard a story or saw a performance collectively.

 (iii) The rate of literacy was low in European countries too, so publishers reached out to people by making them listen to books being read out. 

 (iv) Printers published popular ballads and folktales, profusely illustrated. These were then sung and recited at village gatherings in taverns in towns. Oral culture thus entered print and printed material was orally transmitted. Hearing and reading public, thus became one.

12. “Catholic church began to maintain an Index of Prohibited Books from 1558”. Give reasons.

Answer : (i) Print stimulated even little-educated working people. Menocchio, a miller in Italy, began to read books that were available in his locality and he reinterpreted the message of the Bible and formulated a view of God and Creation that enraged the Roman Catholic Church. 

 (ii) When the Roman Church began its inquisition to repress heretical ideas (Beliefs which do not follow the accepted teachings of the Church) Menocchio was hauled up twice and ultimately executed. 

(iii) The Roman Church, troubled by such effects of popular readings and questioning of faith, imposed severe controls over publishers and booksellers and began to maintain an Index of Prohibited Books from 1558.

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Sunday, November 26, 2023

NCERT Solutions for Class 9 Science Chapter 11 Work and Energy

 Work  and Energy

Q1. A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force. Let us take it that the force acts on the object through the displacement. What is the work done in this case?

Answer : F=7N ,s = 8 m

        W = F × s
        = 7 N × 8 m
        W = 56J
        ∴ Work done is 56 J.
Q2. When do we say that work is done?

Answer : Work is said to be done when a force causes displacement of an object in
 the direction of applied force.

Q3. Write an expression for the work done when a force is acting on an object in 
the direction of its displacement.

Answer :Work done = Force x Displacement

Q4. Define 1J of work.

Answer : 1 Joule of work is said to be done when a force of 1N causes a displacement
 of 1m in its own direction .

Q5. A pair of bullocks exerts a force of 140 N on a plough. The field being 
ploughed is 15 m long. How much work is done in ploughing the length of the
 field?

Answer : Force = 140 N
        s = 15m
        W = ?
        W = F × s
        = 140 N x 15 m
        = 2100 Nm
        W = 2100 J
        ∴ Work done in ploughing the length of the field is 2100 J.

Q6. What is the kinetic energy of an object?

Answer : The energy possessed by an object by virtue of its motion is called 
kinetic energy of an object.

Q7. Write an expression for the kinetic energy of an object.

Answer : If a body of mass m is moving with a velocity v, then its kinetic energy K.E is 
given by the expression, K.E = 1/2 mv2. 

Q8. The kinetic energy of an object of mass, m moving with a velocity of 5 m/s is 25 J.
 What will be its kinetic energy when its velocity is doubled? What will be its kinetic
energy when its velocity is increased three times.

Answer : Using the formula for the kinetic energy we have :

                                                          K.E\ =\ \frac{1}{2}mv^2

or                                                           25\ =\ \frac{1}{2}m\times 5^2

or                                                             m\ =\ 2\ Kg

i) Kinetic energy when velocity is doubled : V= 2 x 5 = 10

                                                        K.E\ =\ \frac{1}{2}mv^2

                                                                    =\ \frac{1}{2}\times2 \times 10^2

                                                                    =\ 100\ J

(ii) Kinetic energy when velocity is tripled : 3 x 5 =15

                                                         K.E\ =\ \frac{1}{2}mv^2

                                                                     =\ \frac{1}{2}\times 2\times 15^2

or                                                                 =\ 225\ J


Q9. 
What is power ?

Answer : Power is defined as the rate of doing work.

Q10. Define 1 watt of power.

Answer : Power is said to be 1 watt when 1 Joule work is done in 1 second.

Q11. A lamp consumes 1000 J of electrical energy in 10 s. What is its power?

Answer : Given W = 1000J, t = 10s, P =?
We know, P = W/t = 1000/10 = 100W

Q12. Define average power.

Answer : Average power is defined as the total energy consumed divided by the 
total time taken.

Q13. Look at the activities listed below. Reason out whether or not work is done in 
the light of your understanding of the term ‘work’.

(a) Suma is swimming in a pond.

Answer : Yes. Suma is doing work. She pushes water in the backward direction and the
 displacement is in forward direction.

(b) A donkey is carrying a load on its back.

Answer : No,While carrying a load, the donkey has to apply a force in the upward 
direction.But, displacement of the load is in the forward direction. Since, displacement 
is perpendicular to force, the work done is zero.

c) A wind mill is lifting water from a well.

Answer : yes, when a windmill is lifting a water from well, it is applying a force in
the upward direction, and it is moving water in the upward direction. Since 
displacement and  force are in the same direction , work is done.

(d) A green plant is carrying out photosynthesis.

Answer : In this case, there is no force involved when a green plant is carrying 
photosynthesis and no displacement takes place . Therefore work done is Zero.

(e) An engine is pulling a train.

Answer :  An engine applies force to pull the train. This allows the train to move in 
the direction of force. Therefore, there is a displacement in the train in the same direction.
 Hence, work is done by the engine on the train.

(f) Food grains are getting dried in the sun.

Answer : When food grains are getting dried in the Sun, there is no force 
involved. Hence, the work done is zero during the process of food grains
 getting dried in the Sun.

(g) A sailboat is moving due to wind energy.

Answer: When a sailboat is moving due to wind energy, force is applied by 
the boat in the forward direction. Therefore, there is a displacement in the 
boat in the direction of force. Hence, work is done by wind on the boat.

14. An object thrown at a certain angle to the ground moves in a curved path and 
falls back to the ground. The initial and the final points of the path of the object lie
 on the same horizontal line. What is the work done by the force of gravity on the
 object?

Answer : Since the body returns to a point which is on the same horizontal line through
 the point of projection, no displacement has taken place against the force of gravity, 
therefore, no work is done by the force due to gravity.

15. A battery lights a bulb. Describe the energy changes involved in the process.

Answer: A battery converts chemical energy into electrical energy. This electrical energy 
is converted into light energy as the bulb is lighted up, i.e., the sequence of energy 
changes is as follows : Chemical energy  Electrical energy  Light energy.  

16. A mass of 10 kg is at a point A on a table. It is moved to a point B. If the line
 joining A and B is horizontal, what is the work done on the object by the 
gravitational force? Explain your answer.

Answer : The work done is zero. This is because the gravitational force and displacement 
are perpendicular to each other.

17. The potential energy of a freely falling object decreases progressively.
 Does this violate the law of conservation of energy? Why?

Answer : It does not violate the law Of conservation of energy. Whatever, is the decrease 
in PE due to loss of height, same is the increase in the KE due to increase in velocity 
of the body.

18. What are the various energy transformations that occur when you 
are riding a bicycle?

Answer : While riding a bicycle,the muscular energy of the rider gets transferred to 
heat energy and kinetic energy of the bicycle.

19. Does the transfer of energy take place when you push a huge rock with
 all your might and fail to move it? Where is the energy you spend going?

Answer :No, the transfer of energy will not take place when we push a huge rock 
and fail to move it.
No loss of energy will take place because the applied muscular energy will be 
converted into heat energy which will heat up the body.

20. A certain household has consumed 250 units of energy during a month.
 How much energy is this in joules?

Answer : Energy consumed by certain households in a month 
E=250 units  =250 k Wh

E=250×3.6×106 J (1kWh=3.6×106J)
E=9×108 Joules

21. An object of mass 40 kg is raised to a height of 5 m above the ground. 
What is its potential energy?
If the object is allowed to fall, find its kinetic energy when it is half-way down.

Answer : 

Given :
Mass of the object M=40kg
Height upto which it is raised h=5 m
Potential energy P.E=Mgh
P.E=40×10×5=2000J

Let its kinetic energy be Ek when it is half way down i.e h=h2
According to conservation of energy,
K.Ei+P.Ei=K.Ef+P.Ef
0+2000=Ek+Mgh2
 2000=Ek+40×10×52
Ek=1000

 Work is done because the displacement of water takes place and a force is applied by the wind mill. Wind mill does a work against gravity.Work is done because the displacement of water tak2es place and a force is applied by the wind mill. Wind mill does a work against gravity.





Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Solutions

  Chapter 1  Matter in Our Surroundings Q1. Which of the following are matter? Chair, air, love, smell, hate, almonds, thought, cold, cold-d...