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Man moved from a stage of necessity to a stage of freedom.elaborate the statement

Posted by Arshad Hussain 6 years, 6 months ago

CBSE > Class 11 > Geography

1 answers

Shiv Pratap Mishra 6 years, 6 months ago

Earlier whatever new things the humans invented or found was their necessity , for example , they invented fire because they recognised the need to cook the raw meat etc . But today whatever new creations they are inventing is not their necessity but it is their choice , their freedom .

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Article writing how i overcome challenges

Posted by Happy Singh 6 years, 6 months ago

CBSE > Class 11 > English Core

0 answers

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Question20 of jounal(ch:4)(kalyani publishers book)pg:4.66

Posted by Avtar Singh 6 years, 6 months ago

CBSE > Class 11 > Accountancy

0 answers

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Why did the narrator want to duplicate the voyag

Posted by Aryan Rana 6 years, 6 months ago

CBSE > Class 11 > English Elective CBSE (Deleted)

0 answers

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Calculate mass of one molecule of ammonia

Posted by Gaurav Gupta 6 years, 6 months ago

CBSE > Class 11 > Chemistry

1 answers

Yogita Ingle 6 years, 6 months ago

1 mole of ammonia weighs 17 g.
1 molecule of ammonia = (17 / 6.023 x 10²³) = 2.82 x 10^-²³ g = 2.82 x 10^-²⁰ kg.

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What is a quantum no and its all parts and defination also

Posted by Rahul Dalal 6 years, 6 months ago

CBSE > Class 11 > Chemistry

0 answers

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Concept of relative velocity

Posted by Rahul Dalal 6 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 6 years, 6 months ago

If two objects are moving in parallel their relative velocity can be calculated. For example, two cars are moving in the same direction along a road. Car A is travelling at +30 m/s and Car B is travelling at +20 m/s. Their relative velocity is 30 – 20 = +10 m/s.

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Explain how psychology study metal process

Posted by Manish Kumar 6 years, 6 months ago

CBSE > Class 11 > Psychology

1 answers

Sia ? 6 years, 6 months ago

Mental process or mental function are terms often used interchangeably for all the things that individuals can do with their minds. These include perception, memory, thinking (such as ideation, imagination, belief, reasoning, etc.), volition, and emotion. Sometimes the term cognitive function is used instead.

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What are omnis cellula and e cellula? In detail.

Posted by Ayush Kumar 6 years, 6 months ago

CBSE > Class 11 > Biology

1 answers

Sia ? 6 years, 6 months ago

"omnis cellula-e cellula" means that new cells arise from pre-existing cells. Key points of the modern cell theory are: All known living things are made up of one or more cells.

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What is a relative velocity

Posted by Rahul Dalal 6 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 6 years, 6 months ago

The vector difference between the velocities of two bodies : the velocity of a body with respect to another regarded as being at rest

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Dimensional formula of density

Posted by Apan Debbarma 6 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Yogita Ingle 6 years, 6 months ago

Dimensional formula of Density is [ML^-3T⁰]

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Project on measures of central tendency mean,median,mode

Posted by Preet Kaur 6 years, 6 months ago

CBSE > Class 11 > Economics

0 answers

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in india some movements are still organised to demand small seprate states ? explain

Posted by Nidhi Kalwani 6 years, 6 months ago

CBSE > Class 11 > Political Science

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Which physical features of austramithic helped them to live on trees?

Posted by Ankush Garg 6 years, 6 months ago

CBSE > Class 11 > History

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Describe few solution for disposal of electronic wastage with the help of chemistry

Posted by Anjali Maurya 6 years, 6 months ago

CBSE > Class 11 > Chemistry

1 answers

Sia ? 6 years, 6 months ago

Recycling raw materials from end-of-life electronics is the most effective solution to the growing e-waste problem. Most electronic devices contain a variety of materials, including metals that can be recovered for future uses. By dismantling and providing reuse possibilities, intact natural resources are conserved and air and water pollution caused by hazardous disposal is avoided. Additionally, recycling reduces the amount of greenhouse gas emissions caused by the manufacturing of new products. Another benefit of recycling e-waste is that many of the materials can be recycled and re-used again. Materials that can be recycled include "ferrous (iron-based) and non-ferrous metals, glass, and various types of plastic." “Non-ferrous metals, mainly aluminum and copper can all be re-smelted and re-manufactured. Ferrous metals such as steel and iron can be also be re-used." Due to the recent surge in popularity in 3D printing, certain 3D printers have been designed (FDM variety) to produce waste that can be easily recycled which decreases the amount of harmful pollutants in the atmosphere.[80] The excess plastic from these printers that comes out as a byproduct can also be reused to create new 3D printed creations.

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Defune majot problem of the economy

Posted by Divyansh Jain 6 years, 6 months ago

CBSE > Class 11 > Economics

1 answers

Sia ? 6 years, 6 months ago

The Economic problem –sometimes called basic or central economic problem – asserts that an economy's finite resources are insufficient to satisfy all human wants and needs.

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A-B = A ∆ (A intersection B)

Posted by Palak Agrawal 6 years, 6 months ago

CBSE > Class 11 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

A-B means everything in A except for anything in A∩B
A-B=A∩Bc (A intersect B complement)
pick an element x
let x∈(A-B)
therefore x∈A but x∉B
x∉B means x∈Bc
x∈A and x∈Bc
x∈(A∩Bc)
x∈(A-B)
therefore A-B=A∩Bc

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Sin15=? Cos15=? Tan15=? Sin75=? Cos75=? Tan75=? Sin105=? Cos105=? Tan105=?

Posted by Piyush Bothra 6 years, 6 months ago

CBSE > Class 11 > Mathematics

0 answers

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What is a joint venture

Posted by Naveen Parnwal 6 years, 6 months ago

CBSE > Class 11 > Accountancy

1 answers

Yogita Ingle 6 years, 6 months ago

(1) Two or more individuals or enterprises, either private or government, owned or a foreign company joining together through participation in equity capital for achieving a common target and mutual benefit is known as joint venture.
(2) Joint venture involves pooling of resources and expertise as well as sharing of risks and rewards by these enterprises.
(3) These enterprises agree to join together for the expansion of business, development of new products or for penetrating into new foreign markets.
(4) Joint ventures are formed either for long-term projects or for short-term projects.
(5) The basic purpose of joint ventures is to attain a strong position for both the enterprises.

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अालेख लेखन ‘मिटती नही हस्ती हमारी’

Posted by Aman Sharma 6 years, 6 months ago

CBSE > Class 11 > हिंदी कोर

1 answers

Falguni Singh 6 years, 6 months ago

Is this is your holidayhomework??

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Wht is differentiation and integration?

Posted by Harshdeep Singh 6 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Sia ? 6 years, 6 months ago

Differentiation is the essence of Calculus. A derivative is defined as the instantaneous rate of change in function based on one of its variables. It is similar to finding the slope of tangent to the function at a point.

The integration of a function f(x) is given by F(x) and it is represented by:

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Evaluate Tan 13π/12

Posted by Harpreet Singh 6 years, 6 months ago

CBSE > Class 11 > Mathematics

2 answers

Harshdeep Singh 6 years, 6 months ago

Tu ki laina pdhla apna

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Sia ? 6 years, 6 months ago

By the tangent subtraction formula:
tan(A - B) = [tan(A) - tan(B)]/[1 + tan(A)tan(B)].
Thus:
tan(13π/12)
= tan(4π/3 - π/4), from the hint
= [tan(4π/3) - tan(π/4)]/[1 + tan(4π/3)tan(π/4)], from the above formula
= (-1 + √3)/(1 + √3)
= -(1 - √3)/(1 + √3)
= -(1 - √3)^2/[(1 + √3)(1 - √3)], by rationalizing
= -(1 - √3)^2/(1 - 3), via difference of squares
= (1/2)(1 - √3)^2
= (1/2)(1 - 2√3 + 3)
= (1/2)(4 - 2√3)
= 2 - √3.

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Definition of molarity

Posted by Prashant Kumar 6 years, 6 months ago

CBSE > Class 11 > Chemistry

2 answers

Dhama ...? 6 years, 6 months ago

It is defined as the number of moles of solute dissolve in 1 litre of solution and molarity is represent by (M)..

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Sia ? 6 years, 6 months ago

Molarity is a concentration unit, defined to be the number of moles of solute divided by the number of liters of solution.

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Solve l3-4×l≥9

Posted by Harpreet Singh 6 years, 6 months ago

CBSE > Class 11 > Mathematics

0 answers

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Sin20.sin40.sin60.sin80=1/16

Posted by Kshitiz Chaudhary 6 years, 6 months ago

CBSE > Class 11 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

since,sin60=√ 3/2

= √ 3/2( sin20sin40sin80)

=√ 3/2( sin20sin80sin40)

=√ 3/4 [(2sin20sin40)sin80]

on applying [cos(A-B)-cos(A+B) = 2sinAsinB]

we get,

= √ 3/4 (cos20-cos60)sin80 [since,cos(-a)=cosa]

= √ 3/4(cos20sin80-cos60sin80)

= √ 3/8(2sin80cos20-sin80)

= √ 3/8(sin100+sin60-sin80)

= √ 3/8( √ 3/2+sin100-sin80 )

= √ 3/8( √ 3/2+sin(180-80)-sin80 )

= √ 3/8( √ 3/2+sin80-sin80 ) [since,sin(180-a)=sina]

= √ 3/8( √ 3/2)

= 3/16

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What is Imaginary or Real numbers?

Posted by Harpreet Singh 6 years, 6 months ago

CBSE > Class 11 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

An imaginary number is a complex number that can be written as a real number multiplied by the imaginary unit i, which is defined by its property i2 = −1.

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if x=a+b+ctsquare where X in metre and t in second; what is dimension formula of c

Posted by Pushpendra Pratap 6 years, 6 months ago

CBSE > Class 11 > Physics

1 answers

Sweety Pandey 6 years, 6 months ago

VwhH

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Write a short note on the tool making ability of the early man

Posted by Tejaa Su 6 years, 6 months ago

CBSE > Class 11 > History

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P(n)=1+4+7+.......+n(n+1)(n+2)= {n(n+1)(n+2)(n+3)}÷4 Given for P(1) and P(m).Prove for P(m+1)

Posted by Yash Goswami????? 6 years, 6 months ago

CBSE > Class 11 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

Let P(n) = {tex}1 \cdot 2 \cdot 3 + 2 \cdot 3 \cdot 4 + .... + n(n + 1)(n + 2){/tex}{tex} = \frac{{n(n + 1)(n + 2)(n + 3)}}{4}{/tex}
For n = 1
{tex}P(1) = 1 \times 2 \times 3 = \frac{{1 \times 2 \times 3 \times 4}}{4} \Rightarrow 6 = 6{/tex}
{tex}\therefore {/tex} P (1) is true
Let P(n) be true for n = k.
{tex}\therefore P(k) = 1 \cdot 2 \cdot 3 + 2 \cdot 3 \cdot 4 + ...{/tex}{tex} + (k + 1)(k + 2) = \frac{{k(k + 1)(k + 2)(k + 3)}}{4}{/tex} ... (i)
For n = k + 1
{tex}P(k + 1) = 1 \cdot 2 \cdot 3 + 2 \cdot 3 \cdot 4 + ... + {/tex}{tex}k(k + 1)(k + 2) + (k + 1)(k + 2)(k + 3){/tex}
{tex} = \frac{{k(k + 1)(k + 2)(k + 3)}}{4}{/tex} + (k + 1) (k + 2) (k + 3) [Using (i)]
{tex} = (k + 1)(k + 2)(k + 3)\left[ {\frac{{k + 4}}{4}} \right]{/tex}
{tex} = \frac{{(k + 1)(k + 2)(k + 3)(k + 4)}}{4}{/tex}
{tex}\therefore {/tex} P(k + 1) is true.
Thus P(k) is true {tex} \Rightarrow {/tex} P (k + 1) is true.
Hence by principle of mathematical induction, P(n) is true for all {tex}n \in N{/tex}.

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What do you know about Charl delvin

Posted by Kartik Sharma 6 years, 6 months ago

CBSE > Class 11 > History

3 answers

Dev Chauhan 6 years, 6 months ago

Charles darwin was a great scientist .He wote the book "on the basis of species " according to this book they tell us that all the human beings or human like creatures were developed by the animals .

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Shad Qureshi 6 years, 6 months ago

Nothing

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Arshad Hussain 6 years, 6 months ago

Nothing

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