Q u e s t i o n :P (-2, 5) and Q (3, 2) are two points. Find the co-ordinates of the point R on PQ such that PR = 2QR.
A n s w e r:

PR:QR = 2:1

R(4 / 3, 3)

The mineral acid: is inorganic compounds composed of different chemical element combinations. Commonly used mineral acids are sulfuric acid, hydrochloric acid, and nitric acid, etc
 An organic acid is an organic compound essentially composed of carbon and hydrogen atoms.   Now some examples of organic acids are carboxylic acids whose acidity is associated with carboxyl group-COOH, sulphonic acids containing the group-SO₂OH.

<i>Rhizopus</i>, mushroom etc., reproduce by spore formation. The three conditions favourable for spores to germinate and grow are as follows:

• Moisture
• Optimum temperature
• Oxygen 
• Nutrients

Let a be the positive odd integer which when divided by 6 gives q as quotient and r as remainder.

according to Euclid’s division lemma
a=bq+r

a=6q+r

where , a=0,1,2,3,4,5
then,
a=6q
or
a=6q+1
or
a=6q+2
or
a=6q+3
or
a=6q+4
or
a=6q+5

but here,
a=6q+1 & a=6q+3 & a=6q+5 are odd.

Soul is a 2020 American computer-animated comedy-drama film produced by Pixar Animation Studios for distribution by Walt Disney Pictures. It is directed by Pete Docter and co-directed by Kemp Powers, and written by Docter, Powers, and Mike Jones. The film stars the voices of Jamie Foxx, Tina Fey, Questlove, Phylicia Rashad, Daveed Diggs, and Angela Bassett.

Soul premiered at the BFI London Film Festival on October 11, 2020. Originally intended to be a theatrical release, it will be digitally released on Disney+ on December 25, 2020. The film received critical acclaim and holds a rare 100% approval rating on Rotten Tomatoes. It was praised for its animation, story, voice acting, and music.

The law of conservation of mass states that “The mass in an isolated system can neither be created nor be destroyed but can be transformed from one form to another”.

Advantages are as follows :

1. Attract large number of customers :As these stores are usually located at central places, they attract large number of customers during the best part of the day.
2. Convenience of buying : By offering large variety of goods under one roof, the department stores provide great convenience to customers in buying almost all goods of their requirements at one place. As a result, they do not have to run from one place to the other, to complete their shopping.
3. Attractive services : A department store aims at providing maximum services to the customers. Some of the services offered by it include home delivery of goods, execution of telephone order, grant of credit facilities and provision for rest-room, etc.
4. Economy of large-scale operations : As they stores are organized on a very large scale, the benefits of large-scale operations, particularly, in respect of purchase of goods, are available to them.

5. Promotion of sales : The department stores are in a position to spend considerable amount of money on advertising and other promotional activities, which help in boosting their sales.
Limitations :
1. Lack of personal attention : Because of the large-scale operations, it is very difficult to provide adequate personal attention to the customers in a departmental store.

2. High operating cost : As the departmental stores give more emphasis on providing services, their operating costs tend to be on the higher side. These costs, in turn, make the prices of the goods high. They are, therefore, not attractive to the lower-income group of people.

3. High possibility of loss : As a result of high operating costs and large-scale operations, the chances of incurring losses in a departmental store are high. For example, if there is any change in the tastes of customers or latest fashions, it necessitates selling of such out-of-fashion articles in clearance sale, to reduce the huge inventory of goods built up.

4. Inconvenient location : As a department store is generally situated at a central location, it is not convenient for the purchase of goods that are needed at short notice.

Mail Order Houses : Mail order houses are retail concerns which carry on business through mail. Mail order business is known as "selling through post" for the retailer and "shopping by post" for the consumer.
Usefulness or advantages of Mail Order Houses :
Mail order business is beneficial to both sellers and buyers in the following ways :
1. Convenience : The customer can buy the goods without spending his time and money in travelling to the seller’s place. He gets home delivery of goods and can arrange for payment after giving the order. He can easily buy goods not available in the local market. He often gets a money back guarantee and can return the goods which are not up to the mark. Customers get an opportunity to select goods from a large range.
2. Low operating costs : A mail order house can be located at any place. It is not necessary to maintain showrooms, well-decorated and furnished shops, or a large sales force. There are no bad debts. Thus, the overhead costs of mail order business are low. Risk is also very low. Cross-freights are eliminated because goods can be despatched directly from the manufacturers to customers.

3. Small investment : The seller need not keep stocks as he can procure the goods after receiving orders. Therefore, mail order business can be operated with a small investment and with little risk.

4. Elimination of middlemen : Through mail order business, a manufacturer can directly sell goods to his customers. He need not depend upon middlemen. Direct contact with customers provides control over distribution channel and helps him in understanding customers preferences.

5. Country-wide market : Sales are not limited to local population. A businessman can sell goods to a large number of customers scattered throughout the country. Far off markets can be exploited with the help of postal facilities. The post office acts as the carrier of goods and the collector of sale proceeds. Temporary depressions in local markets do not result in complete loss of business.

6. Flexibility : The type of goods and the media of advertising can be adjusted easily to suit changing fashions. The mailing list can also be changed with shifts in population, etc. Sales are not dependent on the capacity of salemen as sales appeals are designed by experts.

Goods handled by mail order business : Mail order business is not possible in all types of goods. In order to be handled by mail order house, goods must satisfy the following conditions :

1. They should not be easily perishable, i.e., they must not get easily spoiled or deteriorated during the course of transit by post or rail parcel. Goods should be durable.

2. Goods should be standardised or gradable in quality.

3. They should be identified by a brand name or trade mark.

4. They should not be too heavy or bulky to be sent by mail.

A departmental store is a large establishment offering a wide variety of products, classified into well-defined departments, aimed at satisfying practically every customer’s need under one roof. It has a number of departments, each one confining its activities to one kind of product, e.g., there may be separate departments for toiletries, medicines, furniture, groceries, electronics, clothing and dress material. Thus, they satisfy diverse market segments with a wide variety of goods and services.
Some of the important features of a departmental store are as follows
(i) A modem departmental store may provide all facilities such as restaurant, restrooms, etc. In this way they try to provide maximum service to higher class of customers for whom price is of secondary importance.
(ii) These stores are generally located at a central place in the city, which caters to a large number of customers.
(iii) They are generally formed as a joint stock company managed by a board of directors as the size
of these stores is very large.
(iv) A departmental store combines both the functions of retailing as well as warehousing. They purchase directly from manufacturers and operate separate warehouses thereby eliminating undesirable middlemen between the producers and the customers.
Chain stores or multiple shops are networks of retail shops that are owned and operated by manufacturers or intermediaries. Under this type of arrangement, a number of shops with similar appearance are established in localities, spread over different parts of the country in contrast to departmental stores which are established at a central place in the city. These different types of shops normally deal in standardized and branded consumer products, which have rapid sales . turnover. These shops are run by the same organisation and have identical merchandising strategies, with identical products and displays.

Retailer renders following services to the wholesalers
(i) Help in Distribution of Goods Wholesalers provide help in the distribution of goods and making them available to final consumers.
(ii) Personal Selling In this the retailers relieve the producers of this activity and help them in actualising the sale of the products.
(iii) Enabling Large Scale Operations It enables them to operate at large scale and fully concentrate on activities.
(iv) Collecting Market Information Retailers remain in touch with the buyers they know about the tastes, attitudes, preference, etc. Such information is very useful in taking marketing decisions in an organisation.
Some of the important services of retailers from the point of view of consumers are as follows
(i) Regular Availability of Products In order to buy products as and when needed retailer maintains the regular availability of the product.
(ii) New Products Information By arranging effective display of products and personal selling retailers, provide important information about their products.
(iii) Convenience in Buying Retailers are situated very near to the residential areas and remain open for long hours which enables customer to buy products of their requirement.
(iv) After Sales Service Retailers provide after sales services to the customers in the form of
home delivery, supply of spare parts, etc.

Step farming or terrace farming is common in hills to check soil erosion through water current on the slopes. It provides a physical barrier to soil erosion by water. The mountain is made into steps that slows down the speed of rainwater preventing damage to crops.

Features of Federalism:

1. There are two or more levels of government.
2. Different levels of government govern the same citizens, where each level has its own jurisdiction in specific matters of legislation, taxation and administration.
3. Existence and authority of each level of government is constitutionally governed.
4. The fundamental provisions of the constitution cannot be unilaterally changed. Such changes require the consent of both the levels of government.
5. Courts have the power to interpret the constitution. The highest court acts as the umpire if any dispute arises between different levels of government.
6. Sources of revenue for each level of government are specified to ensure its financial autonomy.

• Addition of hot water.
• Addition of poisonous (mercury) compounds in water.
• Blockage of gills of fishes with any pollutant.

Political Party:
A political party is a group of people who come together to contest elections and hold power in the government. Always political parties take some policies and programmes for the society with a view to promote the collective good.
There are different views on what is good for the society and people. Every political party wants to persuade people why their policies are better than other parties, and tries to win the suppott of people.
Three Components of a Political Party:
(i) The Leaders Every political party has some prominent leaders who formulate policies and programmes of the party and choose candidates for contesting elections.
(ii) The Active Members They are involved in different committees of the party and participate directly in their activity.
(iii) The Followers They believe in the party’s ideology and support the party by casting their votes in favour of the party at the time of election.

Retention of configuration: A process in which the relative configuration of an atom is retained. If the atom in question is a stereocenter, retention of configurationusually (but not always) changes R absolute configuration into R, and S into S.

Inversion of configuration: A process in which the relative configuration of an atom is changed. If the atom in question is a stereocenter, inversion of configuration usually (but not always) changes R absolute configurationinto S, and S into R.
Racemization refers to the converting of an enantiomerically pure mixture (one where only one enantiomer is present) into a mixture where more than one of the enantiomers are present. If the racemization results in a mixture where the enantiomers are present in equal quantities

Spacebar key is the longest key on the keyboard

True

Our Indian Constitution is unique for its content and spirit. The Constitution of India decides the rule of the land and is taken as supreme law of the land. The constituent assembly that was behind formulating our constitution has also given scope for amendments in it with time. Hence, the Indian Constitution of what it is today has undergone substantive changes on account of several amendments. The act also called The Constitution Act, 1976 is termed as one of the most controversial acts in the history of amendments to the Indian Constitution. It amended/ introduced various provisions given below:

• Attempted to reduce the power of the Supreme Court and the High Courts
• Laid down Fundamental Duties for citizens
• Terms- Socialist, Secular, and Integrity added to the Preamble