The narrator grandfather in the portrait looked like a century old person with a long white beard which ran in a flowing manner.

I seemed the grandfather had many grandchildren, but the grandmother was actually too young for him.

The grandfather looked odd when compared with the grandmother about his age.

A molecule is defined as the smallest unit of a compound that contains the chemical properties of the compound. Molecules are made up of groups of atoms. Describing the structure of an atom, an atom is also sub-divided into smaller units. Protons, electrons, and neutrons are sub-particles of an atom. The protons and neutrons are contained inside the nucleus of the atom and electrons revolve around the nucleus.

Protons are positively charged particles whereas electrons are negatively charged particles. Neutrons do not carry any charge. So we can say that the nucleus is positively charged due to the presence of protons. The nucleus is a bulk mass at the centre of an atom. Atoms are largely vacant.

Background Students are expected to have acquired a reasonable degree of language proficiency in English Language by the time they come to class XI, and the course aims, essentially, at promoting the higher-order language skills. For a large number of students, the higher secondary stage will be a preparation for the university, where a fairly high degree of proficiency in English may be required. But for another large group, the higher secondary stage may be a preparation for entry into the professional domain. The Core Course should cater to both groups by promoting the language skills required for academic study as well as the language skills required for the workplace.

Click on the given link for syllabus:

<a data-ved="2ahUKEwi-tIml5sftAhXTdCsKHcPFC9YQFjALegQIIRAC" href="http://www.cbseacademic.nic.in/web_material/CurriculumMain21/SrSecondary/English.core_Sr.Sec_2020-21.pdf" ping="/url?sa=t&source=web&rct=j&url=http://www.cbseacademic.nic.in/web_material/CurriculumMain21/SrSecondary/English.core_Sr.Sec_2020-21.pdf&ved=2ahUKEwi-tIml5sftAhXTdCsKHcPFC9YQFjALegQIIRAC" rel="noopener" target="_blank">English Core - CBSE Academic</a>

1. Physical Purity: In mean cleanliness of internal body and in yoga we are able to purify our internal organs with different yogic / shuddhi kriyas.
2. Postural Deformities: Good Posture is imp for leading a good physical appearance and it can be maintained by yoga. If we do Yoga daily, we can prevent our body from various postural Deformities.
3. Prevention from Diseases: Through due regularity of yoga we can prevent from various disease fighting Resistance.
4. Enhancing Flexibility: If we do yoga a sans daily so we can enhance our flexibility which are very imp for leading a healthy life. It prevent us from injuries and sports and body movement become quick.
5. Mental Relaxation: Yoga is helpful for reducing mental stress everybody waits to free from anger, anxiety and emotional disturbances which is possible by the regular practice of yoga.
6. Reduce Obesity: Through the yogic exercises we can reduce obesity and make our body fit.
7. Will power & Confidence: Through meditation mind can be trained to concentrate in one direction. All the distractions are eliminated and persons get mental power.

Answer:  The two occupations one can choose after being trained in the area of child development are:

(i) Open a creche.

(ii) Aanganwadi worker under ICDS(integrated Child Development Services project).

Material culture refers to the physical objects, resources, and spaces that people use to define their culture. These include homes, neighborhoods, cities, schools, churches, synagogues, temples, mosques, offices, factories and plants, tools, means of production, goods and products, stores, and so forth. All of these physical aspects of a culture help to define its members' behaviors and perceptions. For example, technology is a vital aspect of material culture in today's United States. American students must learn to use computers to survive in college and business, in contrast to young adults in the Yanomamo society in the Amazon who must learn to build weapons and hunt.

Altruism: The principle of acting to benefit others without any selfishness or self-interest.

Sociologists understand altruism as a 'principle of unselfish regard for the needs and interests of others'. Durkheim studied some forms of suicide a category of altruistic sacrifice some individuals make for their societies in particular contexts, whether it be due to a strong sense of social cohesion or tradition.

Division of labour refers to the method of organising production where the work required to produce a product is divided into different specialized tasks with different workers specializing in each task.
The four ways in which division of labour will influence production in an economy are as follows:
i. Quality of production improves - Division of labour leads to an increase in the efficiency of labour which further leads not only to an increase in the quantity of output but also to an improvement in the quality of the produced goods and services.
ii. Large scale production - Division of labour makes large scale production possible. Indeed, scale production requires division of labour. If a car manufacturing company, for instance wishes to make 10000 cars in a year but does not introduce division of labour in its factory, it will have to employ so many workers that it will not be an economically viable company. It is by virtue of division of labour that the company can produce 10000 cars per year with a reasonable number of workers.
iii. Reduced average cost - Since division of labour increases total output, even with an unchanged number of labourers, the average cost of producing a commodity falls. This is a social advantage. Society can produce goods by incurring lower average cost of production.
iv. Lower prices of output - The reduced average cost of the products leads to reduced prices of the outputs in the market. As a result, consumers are benefitted.

Divisin of Labour :

1. It means labour will be distributed among the different individuals having different skills of specializations.

2. Division of labour became popular in modern and complex societies after the Industrial Revolution.

3. With the increase of division of labour in modern societies, individuals are more than ever functionally connected by their mutual needs.

4. Due to this process, every labour (usually) is specialised, individuals become more dependent on others to perform separate economic functions, which they are not able to carry out themselves

1. Face-to-face interaction: Primary groups are characterized by close intimate and face to face interaction.
2. Intimacy: Here everyone knows everyone else and there is strong intimacy among the members. They are even known to nick names of their members.
3. Mutual Aid & Help: Mutual aid assistance among the members of the groups always found. They cooperate with each other at the time of help.
4. Consciousness of kind: Consciousness of kind exists. If means they recognize one another and express it whenever needed.
5. We – Feeling: we – feeling (sense of unity and commonality) is found among the members of the group. It means they live together as one body.
6. Small in Size: Primary groups are smaller in size. Large number decreases intimacy and loose the bond of the group.
7. Physical proximity or nearness: face-to-face relation can be found only when members live in a particular area more or less on permanent basis.
8. Frequent Interaction: Interaction among members of the group is frequent and it can be many times in a day.
9. Personal relation: In this, interest of each is centered in others as persons. They interact with each other on the basis of personal relation.
10. Similarity of background: Members must have more or less similar background.

The classes were: 

1. Feudal Classes: The king stood at the top. He bestowed lands to a number of lords. These lords distributed lands to lesser lords called barons. The Dukes and Earls were king’s Vassals. They showed allegiance to the king.

In the time of war, the king could demand military help from his Vassals. The feudal lords kept soldiers. They levied taxes.

2. The peasants: The peasants formed the lowest class. Their number was largest in society. The peasants were divided into many classes -freeholders and villeins.

A new class sprang up. It was the middle class. Reasons for its development was the coming of new inventions and development of trade and industries.

• A society is a group of people who share a common culture, occupy a territorial area and are bound to each other by a common history.
• Societies may be simple, may be complex. It is natural to human beings. We all are social beings. We cannot survive without society. We human beings cannot attain our goals alone, we want society. The society provides us security, relationship, identity and sense of belonging ness.
• Society is mandatory not only for mere survival but also for a good life.
• Society is a continuous process. It is not imposed upon people. It goes on as a natural process. Social relations are the base of social structure. Society can be understood in its abstract as well as concrete form.

The viscous force acting on a sphere is directly proportional to the following parameters:

• the radius of the sphere
• coefficient of viscosity
• the velocity of the object

Mathematically, this is represented as

F∝ηarbvc

Now let us evaluate the values of a, b and c.

Substituting the proportionality sign with an equality sign, we get

F=kηarbvc (1)

Here, k is the constant of proportionality which is a numerical value and has no dimensions.

Writing the dimensions of parameters on either side of equation (1), we get

[MLT^–2] = [ML^–1T^–1]^a [L]^b [LT^-1]^c

Simplifying the above equation, we get

[MLT^–2] = M^a ⋅ L^–a+b+c ⋅ T^–a–c (2)

According to <a href="https://byjus.com/physics/mechanics/">classical mechanics</a>, mass, length and time are independent entities.

Equating the superscripts of mass, length and time respectively from equation (2), we get

a = 1 (3)

–a + b + c = 1 (4)

–a –c = 2 or a + c = 2 (5)

Substituting (3) in (5), we get

1 + c = 2

c = 1 (6)

Substituting the value of (3) & (6) in (4), we get

–1 + b + 1 = 1

b = 1 (7)

Substituting the value of (3), (6) and (7) in (1), we get

F=kηrv

The value of k for a spherical body was experimentally obtained as 6π

Therefore, the viscous force on a spherical body falling through a liquid is given by the equation

F=6πηrv

The procedure of selecting random sample of 5 students out of 25 in a class is as follows:

1. Assign a particular number between 1 to 25 to all the 10 students like, 01, 02, 03, 04, 05, 06, 07, 08, 09, 10. ....... 25

2. Select a number randomly. Let us assume that the number selected is 05.

3. Consult the Two-Digit Random Number Table, two numbers successive to the selected random number (i.e. 05) either horizontally or vertically are the remaining two students (i.e. 06 and 07).

Mrs Pearson and Mrs Fitzgerald are two contrasting characters. Actually, they are foil to each other. Mrs Pearson is a pleasant looking woman in her forties. She appears to be confused and worried. Mrs Fitzgerald is older. She is heavier and has a ‘strong and sinister personality’. Mrs Pearson is timid and gentle. Mrs Fitzgerald is liberated and bold. She smokes and plays with cards. The two ladies have sharply contrasting voices. Mrs Pearson speaks in a ‘light, flurried sort of tone’. She has ‘a touch of suburban Cockney’. Mrs Fitzgerald has a deep voice. Her accent is Irish.

Mrs Pearson has been reduced to a mere servant in her own house. Her children and husband make her run all the time. She has to dance to their beck and call. Her children Doris and Cyril are spoilt children. They are also selfish and thoughtless. They don’t pay that respect to their mother which she really deserves. Mr George also treats his wife rather indifferently and coldly. Mrs Pearson is condemned to drudgery. Mrs Fitzgerald, on the other hand, is a liberated woman. She is bold and dominating. She enjoys good time and is the mistress of herself and the family.

Mrs Pearson is tender and mild. When Mrs Fitzerald gives a heavy dose to Doris, Cyril and George, she can’t bear it. She asks her to stop the drama at once. She presses her to change back their personalities. Mrs Fitzgerald is firm, solid and result-oriented. She sets all the spoilt members of Mrs Pearson’s family right. She is a better judge of men and matters than Mrs Pearson.

Mrs. Pearson

Mrs. Pearson appears to be a timid and confused lady. She is in her forties. She is a devoted housewife. She enjoys serving her husband and  children. She is ignored and made to work throughout the day. In spite of their ill treatment, neglect and exploitation, she loves them all. In fact, for that she endures everything without any murmur or protest. We feel sympathy for her. We wish her to be a little more assertive. However, Mrs. Fitzgerald brings about a change in her personality. She helps her to become more assertive and dominating at the end.

Mrs. Fitzgerald

Mrs. Fitzgerald is quite experienced and smart. She knows some esoteric magic that she learned in the East. She is heavier and has a 'strong and sinister personality'. She is liberated, strong, dominating and bold. She smokes and plays cards. Mrs Fitzgerald has a deep voice. Her accent is Irish. Mrs. Fitzgerald is firm, solid an d result -oriented. She sets all the spoilt members of Mrs. Pearson's family right.

The Garoghlanian family had a crazy streak. Mourad was considered the natural descendant of uncle Khosrove
as far as the crazy streak was concerned. Mourad’s father, Zorab was practical
and nothing else. But Mourad was his son only in flesh, in the spirit he was
similar to uncle Khosrove. Their tribe was composed of fickle and inconsistent
people who were unpredictable and brought a capricious climate in their family.

Garoghlanian tribes were the Armenian tribes known for their honesty. They had a crazy streak which made them different

• The question has been asked from the story The Summer Of the Beautiful White Horse.
• There was typically an insane streak in the typical Garoghlanian family.  
• As far as the rebellious streak was genuinely concerned, Mourad was regarded as Uncle Khosrove 's native descendant.  
• Zorab represented a practical person and realistically was Mourad's father. But he allegedly represented his dear son solely in flesh similar in leading spirit as to Uncle Khosrove.  
• Their tribe was composed of fickle and inconsistent individuals who were erratic and introduced their family into a capricious world.

The educational system of Germany in those days encouraged rote learning. Conceptual learning and understanding was not heard of.  
Main focus was on mugging up facts and figures without understanding them and Albert Einstein did not like this kind of learning. His teachers criticised  and scolded him for his views.

Albert Einstein took his education in Germany .
The characteristics of the education system was :
There was no scope for conceptual learning.
If there is no interest , then automatically the student will not learn the exact things .

In the story Mothers day, we see the story of a family. This story is set in the 1950s and reflects some of the practices during those times. We see that in the family everyone treats Mrs. Person like a servant and only look for her when they need some work to be done.
This happens because of the negligence on the part of Mrs. Pearson. Since she never opposes such behavior everyone in the family thinks that it is okay for them to treat her in such a way.

Mourad and Aram were cousins and belonged to Garoghlanian tribe which was known for its honesty. Mourad was thirteen and Aram was nine years old. Both longed to ride a horse. But their family was too poor to buy a horse. Both were adventure-loving. Both knew that their family was well known for honesty and right conduct. But Mourad could not help stealing John Byro’s horse. While he had a streak of craziness, Aram was honest and simple-hearted. Mourad was more talented and bolder than Aram. He domesticated the wild horse of John Byro. He repaired the injured wing of a robin bird; he knew how to deal with a horse, and how to soothe a dog. Comparatively, Aram was timid and obedient. Mourad could easily lie to John Byro about the horse. Aram could never do it.

Uncle Khosrove was widely known to be crazy. He was short-tempered and impatient as well. He stopped others from talking by shouting at them. His stock saying was: it is no harm, pay no attention to it. ‘Mourad had got that craziness from Uncle Khosrove.

Ram : The earth, our beloved planet, is ailing.

Mohan : Certainly. It doesn’t seem to be in good health.

Geeta : It is now not only the question of survival of the people but of the survival of the earth itself.

Meera : We owe a responsibility towards the coming generations.

Ram : Should we have a scorched planet of advancing deserts, impoverished landscapes and an ailing environment ?

Mohan : We must check our greed.

Geeta : Forests, particularly the tropical forests, have to be preserved.

Meera : Let us not indulge in overfishing and destroy our fisheries.

Ram : Grassland must be preserved for our animals. They should not be allowed to be converted into deserts.

Mohan : And our croplands should not degenerate into wastelands.

Geeta : Let us preserve nature and natural wealth and resources.

Meera : Let us make this planet, a beautiful and pleasant place to live in.

The grandmother is the central character, the fulcrum around which the entire story revolves. She is 62 years old and her life has been devoted to the kitchen chores and well being of her family.
The novel 'Kashi Yatre' stirs in her yearnings for a visit to Kashi. This shows that the grandmother is quite religious. She is a lady of great commitment and courage which is evident in her desire to master the Kannada alphabet, even at the age of 62. The grandmother proves to be an ideal and diligent student who achieves her desired goal. Moreover she is quite humble and grateful.