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Answered 2 days ago CBSE/Class 9/Mathematics

Santosh Balchandran

Mathematics Tutor

Any number which can be expressed in the form p/q, where i)p and q are integers and ii)q is not 0 is a rational number. Integers are are represented by Z Z={......, -2, -1, 0, 1, 2,.....} 0 can be expressed... read more

Any number which can be expressed in the form p/q,

                           where i)p and q are integers and

                                    ii)q is not 0   

                           is a rational number.

Integers are are represented by Z

Z={......, -2, -1, 0, 1, 2,.....}

 

0 can be expressed as  0/1 or 0/2 or 0/3  and so on

Therefore 0= 0/1=0/2=0/3  and so on

hence we can represent 0 in the form p/q 

where p=0 and q=1,2,3, so on (both an integer)

also q is not equal to 0.

therefore 0 is a rational number.

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Answered 2 days ago CBSE/Class 9/Science

Ratan Jha

Science Teacher

Red colour light has highest wavelength.
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Answered 2 days ago CBSE/Class 9/Science

Salman Ahmad Siddiqui

Maths Teacher

Wavelength of red light is approx. 700nm.
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Lesson Posted 21 hrs ago CBSE/Class 11/Humanities/Economics

When was the Suez Canal opened? How did it affect the Indian economy?Explain

Sujoy D.

1. Strong concept building classes. 2. Weekly tests in weak areas for students to improve their confidence. 3....

Suez Canal was opened in 1869. Suez Canal is an artificial waterway running from North to South across the Isthmus of Suez in North-Eastern Egypt. It is one of the most important waterways in the world. Its opening reduced the cost of transportation and made access to the Indian market easier and economical.... read more

Suez Canal was opened in 1869. Suez Canal is an artificial waterway running from North to South across the Isthmus of Suez in North-Eastern Egypt. It is one of the most important waterways in the world. Its opening reduced the cost of transportation and made access to the Indian market easier and economical. A significant reduction in transport cost prompted monopoly control of India’s foreign trade by the British Government.

 

How was the zamindari system of land settlement responsible for the stagnation of Indian agriculture?

 

The zamindari system of land settlement was responsible for the stagnation of Indian agriculture because of the below mentioned reasons
(i) The zamindars were recognised as permanent owners of the soil.
(ii) The zamindars were to pay a fixed sum to the government as land revenue.
(iii) The zamindars were absolutely free to extract as much from the tillers of the soil as they could.

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Lesson Posted 20 hrs ago CBSE/Class 11/Humanities/Economics

What are the importance of presenting data in graphical form? Which value is key to the graphical presentation...

Sujoy D.

1. Strong concept building classes. 2. Weekly tests in weak areas for students to improve their confidence. 3....

Graphs are attractive way of presenting the information and it is easy to understand. The values of accuracy of data used and coverage of full data is very important for graphical presentation of data. If it prepares wrong data then it will lead to wrong decision making. What do you mean by the term... read more

Graphs are attractive way of presenting the information and it is easy to understand. The values of accuracy of data used and coverage of full data is very important for graphical presentation of data. If it prepares wrong data then it will lead to wrong decision making.

 

What do you mean by the term arithmetic line graph. Explain briefly.

 

An arithmetic line graphs is also called time series graph. In this graph, time (hour, day/date, week, month, year) is plotted along the X-axis and the corresponding values of the variable along the 7-axis.
Arithmetic line graphs, along or time series graphs can mainly he of two types
(i) One variable graphs.
(ii) Two or more than two variable graphs.

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Lesson Posted 20 hrs ago CBSE/Class 11/Humanities/Economics

Describe the path of developmental initiatives taken by Pakistan for its economic development

Sujoy D.

1. Strong concept building classes. 2. Weekly tests in weak areas for students to improve their confidence. 3....

For economic development Pakistan followed the mixed economy model. With co-existence of public and private sectors. The different policies adopted by Pakistan are stated below (i) A variety of regulated policy framework was introduced in late 1950s and 1960s. (ii) Protection of consumer goods, domestic... read more

For economic development Pakistan followed the mixed economy model. With co-existence of public and private sectors.
The different policies adopted by Pakistan are stated below
(i) A variety of regulated policy framework was introduced in late 1950s and 1960s.
(ii) Protection of consumer goods, domestic industries through tariff harriers.
(iii) The introduction of green revolution and mechanisation in agriculture sector…
(iv) Public investment in infrastructure in selected areas.
(v) Nationalisation of capital goods industries was introduced in 1970s.
(vi) In 1980s, denationalisation and encouragement to private sector.
(vii) In 1988, economic reforms were initiated in the economy.

 

The government and policy makers use statistical data to formulate suitable policies of economic development.'Illustrate with two examples.

 

The data on domestic production of oil and demand for oil will help the government in deciding how much it should import.
The data on consumption of past years and the rate of growth of population would help in determining the demand for future.

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Lesson Posted 20 hrs ago CBSE/Class 11/Humanities/Economics

CBSE Class 11 Economics

Sujoy D.

1. Strong concept building classes. 2. Weekly tests in weak areas for students to improve their confidence. 3....

QUESTION Expansion of one industry facilitates the expansion of the other.How economic growth can become a dynamic process and a self-propelling activity of change? ANSWER Availability of proper means of transport and communication, ample sources of energy and a developed system of banking and finance... read more

QUESTION

Expansion of one industry facilitates the expansion of the other.How economic growth can become a dynamic process and a self-propelling activity of change?

 

ANSWER

Availability of proper means of transport and communication, ample sources of energy and a developed system of banking and finance generate an environment of inter-industrial linkages.
In this situation, expansion of one industry facilitates the expansion of the other. Accordingly, growth becomes a dynamic process and a self propelling activity of change.

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Lesson Posted 17 hrs ago CBSE/Class 6/Maths

Circular Motions & Typical Time Speed & Distance 6

Sujoy D.

1. Strong concept building classes. 2. Weekly tests in weak areas for students to improve their confidence. 3....

Concept 1 Post 2: Number of Distinct points 3 bodies will meet on a circular track. Step 1: Find out pairwise distinct meeting points. Step 2 : The overall answer will be the Highest Common Factor of the pairwise values. Example: suppose A, B and C are running with speeds of 7, 9 and 13 on a circular... read more

Concept 1 Post 2: Number of Distinct points 3 bodies will meet on a circular track.

Step 1: Find out pairwise distinct meeting points.

Step 2 : The overall answer will be the Highest Common Factor of the pairwise values.

Example: suppose A, B and C are running with speeds of 7, 9 and 13 on a circular track.

A and B are running clockwise, whereas C is running anti-clockwise.

A and B will have 9 - 7 = 2 distinct meeting points.

A and C will have 7 + 13 = 20 distinct meeting points.

B and C will have 9 + 13 = 22 distinct meeting points.

A, B and C will have HCF (2, 20, 22) = 2 distinct meeting points.

They will meet at 2 distinct points on the track.

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Lesson Posted 17 hrs ago CBSE/Class 6

Who Was Dietrich Brandis? Explain His Achievement In India

Sujoy D.

1. Strong concept building classes. 2. Weekly tests in weak areas for students to improve their confidence. 3....

Dietrich Brandis, a German expert, was appointed the first Inspector-General of Forests in India. His ideas and achievements for the management of forests are stated in the points below (i) He formulated new forest legislation and helped establish research and training institutions. The Imperial Forest... read more

Dietrich Brandis, a German expert, was appointed the first Inspector-General of Forests in India.

His ideas and achievements for the management of forests are stated in the points below

(i) He formulated new forest legislation and helped establish research and training institutions. The Imperial Forest Research Institute at Dehradun was founded by him in 1906.

(ii) He set up the Indian Forest Service (IFS) in 1864 and helped to formulate the Indian Forest Act of 1865.

(iii) He took an interest in the forest flora of North-West and Central India and Indian trees.

(iv) He was among the earliest expert in India to formally link forest protection with local people.

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Lesson Posted 16 hrs ago CBSE/Class 8

Explain Any Five Measures To Control Industrial Pollution In India

Sujoy D.

1. Strong concept building classes. 2. Weekly tests in weak areas for students to improve their confidence. 3....

Five measures to control industrial pollution in India are as follows: (i) Particulate matter in the air can be reduced by fitting smoke stacks to factories with electrostatic precipitators, fabric filters, scrubbers and inertial separators. (ii) Smoke can be reduced by using oil or gas instead of coal... read more

Five measures to control industrial pollution in India are as follows:

(i) Particulate matter in the air can be reduced by fitting smoke stacks to factories with electrostatic precipitators, fabric filters, scrubbers and inertial separators.

(ii) Smoke can be reduced by using oil or gas instead of coal in factories.

(iii) Machinery and equipment can be used and generators should be fitted with silencers.

(iv) Pollution check certificates should be made compulsory.

(v) Machineries used in the industries can be redesigned to increase energy efficiency and reduce noise. Noise absorbing material may also be used.

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