CBSE > Class 10 | CBSE Board | Homework Help

Ask questions which are clear, concise and easy to understand.

Ask Question

Cos theta - sin theta =

Posted by Ansh Tiwari 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Adithya Dev A 4 years, 5 months ago

cos theta - sin theta = √sin^2 theta + cos^2 theta - 2 sin theta cos theta = √1 - 2 sin theta cos theta//

0Thank You

ANSWER

For any positive integer is n, prove that n³-n divisible by 6

Posted by Sk Jishan 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Simran Panwar 4 years, 5 months ago

Out of three (n – 1), n, (n + 1) one must be even, so a is divisible by 2. 2. (n – 1) , n, (n + 1) are consecutive integers thus as proved a must be divisible by 3. Thus, n³ – n is divisible by 6 for any positive integer n.

1Thank You

ANSWER

Explain the diffraction of light.

Posted by Shanvi Sneh 4 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Adithya Dev A 4 years, 5 months ago

In certain cases, if the object placed in the path of light is too small, then there is a tendency for the light to bend and move at the edge of that object. This is called DIFFRACTION of light. According to this concept, light is not a RAY or a BEAM, rather it is an electromagnetic WAVE.

1Thank You

ANSWER

What do you mean by alkali?

Posted by Shanvi Sneh 4 years, 5 months ago

CBSE > Class 10 > Science

4 answers

Pankaj Kumar Patel 4 years, 5 months ago

Those bases which is completely dissolve in water are called alkali

2Thank You

Tarunpreet Singh?? 4 years, 5 months ago

Do you mean "alkaline".

0Thank You

All In One 4 years, 5 months ago

Those base which is soluble in water is known as alkali

1Thank You

Adithya Dev A 4 years, 5 months ago

Bases that are highly soluble in water are called ALKALIS. They are usually STRONG and HIGHLY CORROSIVE in nature as they dissociate completely into OH- (aq) ions when in aqueous solutions when compared to other bases. They are usually formed out of highly reactive metal radicals like Na+, K+, Li+, etc. Eg :- NaOH, KOH, etc.

2Thank You

ANSWER

What happens when baking soda reacts with vinegar?

Posted by Shanvi Sneh 4 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Adithya Dev A 4 years, 5 months ago

When baking soda reacts with vinegar, a colourless and odourless gas is produced along with brisk effervescence which when passed through lime water turns it milky ie, CO2 along with sodium acetate (a basic salt). {{{ NaHCO3 (s) + CH3COOH (aq) ----> CH3COONa (aq) + CO2 (g) + H2O (l). }}}

1Thank You

ANSWER

What is the formula for baking soda and baking powder?

Posted by Shanvi Sneh 4 years, 5 months ago

CBSE > Class 10 > Science

2 answers

Pankaj Kumar Patel 4 years, 5 months ago

Formula of baking soda is NaHCo3.It is also known as sodium hydrogen carbonate or sodium bicarbonate . Formula of baking powder is NaHCO3 +tartaric acid Generally tartaric acid found in turmeric.

0Thank You

Adithya Dev A 4 years, 5 months ago

Formula of BAKING SODA = NaHCO3. Formula of BAKING POWDER = NaHCO3 + tartaric acid.

1Thank You

ANSWER

Write the characteristics of an image.

Posted by Shanvi Sneh 4 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Deepakshi Kabra 4 years, 5 months ago

characteristics of an image(formed on plane mirror) are: It is virtual It is erect and of the same size as the object The distance of the object from the plane mirror is the same as the distance of the image from the plane mirror. One of the important characteristics of the image is that it is laterally inverted Properties of the image formed by a convex mirror : The image is always virtual and erect. The image is highly diminished or point sized. It is always formed between F and P. Concave mirrors can produce both real and virtual images; they can be upright (if virtual) or inverted (if real); they can be behind the mirror (if virtual) or in front of the mirror (if real); they can also be enlarged, reduced, or the same size as object.

1Thank You

ANSWER

Posted by .. S 4 years, 5 months ago

CBSE > Class 10 > English Language and Literature

1 answers

Rebu Do 4 years, 5 months ago

Time waste hi karnae atae ho❔❔❔

0Thank You

ANSWER

Send me paid sample paper 3

Posted by .. S 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

.. S 4 years, 5 months ago

1Thank You

ANSWER

find theZero of the the polynomial if any-x²-2x+3

Posted by Riya Dhillon 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Adithya Dev A 4 years, 5 months ago

- (x^2 + 2x - 3) = 0. (S = 2, P = -3, No :- 3, -1). x^2 + 3x - x - 3 = 0. x (x + 3) - (x + 3) = 0. (x - 1) (x + 3) = 0. x = 1 or -3//

0Thank You

ANSWER

Hii friends can you guys please provide me content of unit 3 ICT skills

Posted by Ayush Maurya 4 years, 5 months ago

CBSE > Class 10 > Information Technology (402)

2 answers

Sahil Singh 4 years, 5 months ago

1Thank You

Abhinandan Sehrawat 4 years, 5 months ago

2Thank You

ANSWER

Explain Guiseppe mazzini

Posted by Piyush Gupta 4 years, 5 months ago

CBSE > Class 10 > Social Science

2 answers

Shanvi Sneh 4 years, 5 months ago

Giuseppe Mazzini was born on 22 June 1805 known as an Italian politician, journalist and activist. He played an important role in forming a secret society, name Giovine Italia (Young Italy). ... The party was the first Italian democratic movement to include all classes and helped to bring independence and unified Italy.

0Thank You

Adithya Dev A 4 years, 5 months ago

Giuseppe Mazzini is considered to be one of the most celebrated Italian Revolutionaries of all time. Born in Genoa in 1807, he became a member of the Carbonari secret society beginning his fight as a revolutionary at a young age. He was sent to exile in 1831 for having attempted a revolution in Liguria, when he was 24. Later he built several secret societies like Young Italy at Marseilles and Young Europe in Berne to spread his revolutionary ideals across Europe. He believed that God intended nations to be natural units of mankind and therefore, with a wish that Italy should no longer remain a patchwork of kingdoms and provinces, he built a coherent programme in the 1830 s visualising his dream for a United Italian Republic.

1Thank You

ANSWER

Father bulke Bharat Mai kitne varsh rhe

Posted by Dhvani Khandelwal 4 years, 5 months ago

CBSE > Class 10 > हिंदी ए

1 answers

Deepakshi Kabra 4 years, 5 months ago

47 वर्ष…

0Thank You

ANSWER

Define the terms federalism. Explain its two types

Posted by Kunal Singh Panwar 4 years, 5 months ago

CBSE > Class 10 > Social Science

1 answers

Adithya Dev A 4 years, 5 months ago

Federalism is a system of govt wherein power is divided between the central authority and the constituent units of a country. It is of two types based on formation :- 1) Coming Together Federations = Smaller units came to form a bigger unit. Here constituent units enjoy equal power. Eg :- USA, Australia, etc. 2) Holding Together Federations = Country divided its power between central authority and constituent units in a country. Constituent units enjoy unequal power. Eg :- India, Spain, etc.

2Thank You

ANSWER

Find the longest diameter of a cone, which can be fully fitted in a cube of edge 8 cm. Justify your answ

Posted by Vaishnavi Shinde 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Adithya Dev A 4 years, 5 months ago

Diameter = 8 cm. When looked from underneath, the base of cone inside the cube looks like a square circumscribing a circle. This means that the diameter of the circular base of the cone is equivalent to the edge of the square base of the cube.

1Thank You

ANSWER

The Resistance of a conductor is 20 ohm. What will be change in resistance if length of a conductor is decrease half by folding

Posted by Sanyam Pratap Singh 4 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Adithya Dev A 4 years, 5 months ago

Resistance also gets halved (as resistance is directly proportional to length) ie, new resistance will be 10 ohm.

1Thank You

ANSWER

लेखक की माॅ ने पूरे दिन का रोजा कयो रखा

Posted by Chhagani Nemil 4 years, 5 months ago

CBSE > Class 10 > हिंदी ब

1 answers

Adithya Dev A 4 years, 5 months ago

Ek din, lekhak ki ma ke samne ek bille ne uchakkar roshandan me bane kabootar ki ghosle me rakhi do me se ek unde ko niche giraaye the. Jeevpriy hone ke karan jab ma ne doosre unde ko bachane ki koshish ki thab us unde unke haath se phisalkar toot gaye. Bacho ko nasht hone ke karan kabootar ki manasik santhulan bigad gaye the. Is drishy ko dekhkar khuda se maphi mangne keliye usne poore din ka roza rakha tha.

0Thank You

ANSWER

Compare the different ways in which the Belgians abd sri lankans dealt with tge problem of cultural diversity

Posted by Mansi Sharma 4 years, 5 months ago

CBSE > Class 10 > Social Science

1 answers

Muskan Roy 4 years, 5 months ago

Answer:Both Belgium and Sri Lanka are democracies, yet they have dealt with the problem of cultural diversity very differently. ... Along with the State Government, both communities have a third kind of Government called 'Community Government' which decides on cultural, education and language related issues.

2Thank You

ANSWER

Physical exercise in the form of stabilize mood, improve self-esteem and induce sleep. Page 1 of 5 4. (1) (1) e 5. to relieve stress as they (1)

Posted by Tanmay Sharma 4 years, 5 months ago

CBSE > Class 10 > Information Technology (402)

0 answers

ANSWER

Activity 12.1

Posted by Spandan Ghagi 4 years, 5 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Prove that X+3 is irrational

Posted by Karpagagnesan N 4 years, 5 months ago

CBSE > Class 10 > Mathematics

3 answers

Akshat Puri 4 years, 5 months ago

Question is not correct ❌.

0Thank You

Gautam Kumar 4 years, 5 months ago

Question invalid.

0Thank You

Raiyan Zaman 4 years, 5 months ago

Hey mate, This question is incomplete, sorry!!

0Thank You

ANSWER

How did Mandela idea of freedom undergo a change later

Posted by Kathir K 4 years, 5 months ago

CBSE > Class 10 > English Language and Literature

3 answers

Adithya Dev A 4 years, 5 months ago

As a child, Nelson Mandela believed that being free means being able to do a lot of things like running around the fields near his mother's hut, swim in the pleasant stream which ran across his village, roasting Mealies at midnight and riding the broad backs of slow moving bulls. But when he became a student, he felt that the boyhood freedom was just an illusion and real freedom meant not stopped from doing things like read what he loved, stay out at night and go where he wished to. But, as a young man at Johannesburg, Mandela realised that the freedom he yearned for till now was just transitory, it changed over time. Slowly, he came to know about basic honourable freedoms or obligations to be fulfilled during the short span of life - marry, work, have children, earn, succeed and enjoy equality in society.

0Thank You

Mayank Choudhary 4 years, 5 months ago

Board hi radh ho va h knowledge nhi ???

0Thank You

Dfuinv Bhjk 4 years, 5 months ago

Board radh ho gya

0Thank You

ANSWER

Find LCM and hcf following number 2/3,4/5,3/5

Posted by Riya Vishwakarma 4 years, 5 months ago

CBSE > Class 10 > Mathematics

1 answers

Adithya Dev A 4 years, 5 months ago

HCF (10/15, 12/15, 9/15) = 1/15. LCM (10/15, 12/15, 9/15) = 180/15 = 12.

0Thank You

ANSWER

Identify the kind of cell division involved in vegetative propagation * 1 point A) Meiosis B) Amitosis C) Mitosis D)None of the above

Posted by Juval Star 4 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Shanvi Sneh 4 years, 5 months ago

Mitosis

0Thank You

ANSWER

Explain the role of Giuseppe Mazzini in spreading revolutionary ideas of Europe?

Posted by Himanshu Dahiya 4 years, 5 months ago

CBSE > Class 10 > Social Science

1 answers

Sia ? 4 years, 4 months ago

The contributions of Giuseppe Mazzini in spreading revolutionary ideas in Europe were -

(i) Mazzini put together a coherent programme for a unitary Italian Republic.

(ii) He had formed a secret society called Young Italy for the dissemination of his goals.

(iii) Mazzini’s relentless opposition to monarchy and his vision of democratic republics frightened the conservatives.

0Thank You

ANSWER

What is nepolean code of 1804

Posted by Manik Adak 4 years, 5 months ago

CBSE > Class 10 > Social Science

3 answers

Danish Shaikh 4 years, 5 months ago

1.Established equality before law. 2.Abolished privelages based on birth and granted right to property to French citizens. 3.Abolished feudal sytem and freed peasants from serfdom and manorial dues. 4.Improved transport and communication and simplified administrative divisions.

0Thank You

Piyush Gupta 4 years, 5 months ago

Civil code of 1804 are Napoleonic code was issued it abolished all privileges based on birth it established equality before law and secured the right to property

0Thank You

Priya Das 4 years, 5 months ago

The Napoleonic Code is also called the "French Civil Code of 1804" defined the concept of equality before the law and also secured the right to property. This code abolished the feudal system and freed peasants from serfdom and manorial dues as well as improvement in the Transport and communication systems.

1Thank You

ANSWER

What are transparent, transmitted and opaque objects

Posted by Shreya Singh 4 years, 5 months ago

CBSE > Class 10 > Science

2 answers

Karthik Karthik 4 years, 5 months ago

Transparent Objects : If you are able to see clearly through an object, it is allowing light to pass through it and is transparent. For example :water,clear glass etc. Opaque Objects : If we cannot see through an object at all, it is an opaque object. For example: wooden door, wall etc.

1Thank You

Adithya Dev A 4 years, 5 months ago

Substances which allow light to pass through them are known to be TRANSPARENT. Eg :- Glass, water, etc. Substances which PARTIALLY allow light to pass through them are considered to be TRANSLUCENT. Eg :- Oily paper, tissue, etc. Substances which does not allow light to pass through them are called OPAQUE SUBSTANCES. Eg :- Clay, wood, etc.

1Thank You

ANSWER

Pls protest against the cancellation of class 10 board exam in delhi

Posted by All In One 4 years, 5 months ago

CBSE > Class 10 > Science

1 answers

Mayank Choudhary 4 years, 5 months ago

Why ?????

0Thank You

ANSWER

Problems with consumer movement

Posted by Anshu Kumari 1 year, 9 months ago

CBSE > Class 10 > Social Science

1 answers

Muskan Roy 1 year, 9 months ago

The consumer redressal process is becoming cumbersome, expensive and time consuming. Many times, consumers are required to engage a lawyer. These cases require time for filing and attending the court proceedings, etc. In most purchases, cash memos are not issued, hence, evidence is not easy to gather.

0Thank You

ANSWER

What happened to jaffers when he tried to catch the invisible man ?

Posted by Anuj Kumar 4 years, 5 months ago

CBSE > Class 10 > English Language and Literature