CBSE > Class 10 | CBSE Board | Homework Help

The Snell's Law of refraction states that the ratio of sine of angle of incidence to that of angle of refraction for a given pair of media is always a constant ie, sin-i/sin-r = constant (n). This constant is also known as REFRACTIVE INDEX of the medium.

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Incredible Foxtrot 4 years, 6 months ago

Snell law states that the ratio of sin of angle of incidence to the sin of angle of refraction is constant for the light of a given color and the given pair of medium .this is true for angle (0<I<90°)

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write character sketch of Lencho from class 10 the first flight the letter to god

Posted by Deepti Jindal 4 years, 6 months ago

CBSE > Class 10 > English Language and Literature

1 answers

Abishai Nathan 4 years, 6 months ago

Lencho was faithful man. He had an unwavering faith in GOD. He never ever Doubted God's power. He also belived that no one dies of hunger. He even wrote a letter to God. He stated his conditions in that letter and asked Gods Help. By this we come to know that Lencho was a man who trusted and counted on God.

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Find the ratio between the L.C.M and H.C.F of 5,15,20

Posted by Sreetika Mondal 4 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Incredible Foxtrot 4 years, 6 months ago

LCM ( 5,15,20) = 60 and HCF (5,15, 20)= 5 . Therefore ratio is equal to 60/5 that is 12:1

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Aakash Anand 4 years, 6 months ago

❤5= 5×1 ❤15=3×5×1 ❤20=2×2×5×1 ?HCF = 5 ? LCM=2×2×3×5= 60 ?❤ Ratio = LCM/HCF = 60/5 ?12/1 ..... Ratio =12:1 .answer ........... Aakash Anand ?❤

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गंगा और मैं’- विषय पर लगभग 100-120 शब्दों में एक लघुकथा लिखिए।

Posted by Kunal Saini 3 years, 11 months ago

CBSE > Class 10 > हिंदी ब

1 answers

Sia ? 3 years, 7 months ago

एक बार टनपुर नामक एक गाँव था। गंगा नदी के पास एक घर के दौरान एक परिवार रहता था। कुछ बिंदु पर डैडी किसी महत्वपूर्ण काम की बदौलत एक अलग गाँव में चला जाता है। इसलिए बेटे को उसकी माँ और बहन के बाद घर और उपस्थिति के रूप में छोड़ दिया जाता है। दोपहर के भीतर अचानक एक महत्वपूर्ण बारिश हुई।
बारिश बहुत भारी थी कि इससे नदी में बाढ़ आ गई। पूरा गाँव भर गया। चूंकि परिवार नदी के पास रहता था इसलिए उनका घर पूरी तरह से भर गया था और इसलिए माँ और बहन संकट में थे। क्योंकि बेटे को जिम्मेदार के रूप में छोड़ दिया गया था क्योंकि वह खतरे से बाहर निकलने का आग्रह करना चाहता था।
वह घर के पास एक जहाज देखता है और अपनी माँ और बहन को घर से बाहर निकलने और सुरक्षित स्थान पर ले जाने में मदद करता है और वह इस प्रकार परिवार को बचाता है।

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Posted by Shraddha Verma 4 years, 6 months ago

CBSE > Class 10 > Social Science

5 answers

Adithya Dev A 4 years, 6 months ago

Sorry, i don't know 14.

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Adithya Dev A 4 years, 6 months ago

9) Is acidic in nature (pH < 6) and is coarse grained. 10) Running water cuts through clayey soil to form deep channels called GULLIES. Soil erosion caused by these channels is called Gully Erosion. 11) When fast flowing water erodes soil cover in a land as a whole to low lying areas, erosion is called Sheet Erosion. 12) Due to heavy rainfall, intense leaching takes place in laterite soil. This causes killing of microorganisms and thus, low humus content. 13) Though Rajasthan has arid soil which is unsuitable for cultivation, it is abundant in solar and wind energy.

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Adithya Dev A 4 years, 6 months ago

7) Himachal Pradesh and Uttarakand. (any state in Western and Central Himalayas). Terrace farming helps prevent soil erosion in hilly areas. 8) Deforestation = Jharkand, Chattisgarh, Odisha, Madhya Pradesh. Overgrazing = Maharashtra, Gujarat, Rajasthan, Madhya Pradesh. Over irrigation = Punjab, Haryana, Uttar Pradesh. Mineral processing and Improper discharge of Industrial wastes.

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Adithya Dev A 4 years, 6 months ago

2) Black soil = formed out of lava flows. 3) Living organisms, bed rock, Sunlight, climate, etc. 4) Plains = 43% of land in India, vast and levelled land, consists of alluvial soil, formed in the banks of rivers. 5) The main agenda of Earth Summit of 1992 was Agenda 21. 6) AGENDA - 21 was a declaration which was signed by world leaders at the first ever United Nations Conference on Environment and Development (UNCED) in Rio de' Janeiro, 1992. It emphasized on environment conservation and sustainable development.

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Shraddha Verma 4 years, 6 months ago

Please answer these questions...

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Which soil is found in the largest area of the country? How is it formed?

Posted by Shraddha Verma 4 years, 6 months ago

CBSE > Class 10 > Social Science

2 answers

Anandi Sigar 4 years, 6 months ago

Alluvial soil is found in large areas of country.it is formed from deposition of sediments

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Adithya Dev A 4 years, 6 months ago

Alluvial soil. Deposited by three important Himalayan rivers - Indus, Ganga and Brahmaputre and also by other southern rivers like Mahanadi, Godavari, Krishna and Kaveri.

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For what value of an unnatural number 24th is divisible by 8

Posted by Swikruti Mohanty 4 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Prince Saini 4 years, 6 months ago

Yeah

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there is a 480%

Posted by Md.Shabbir Uddin 4 years, 6 months ago

CBSE > Class 10 > English Language and Literature

1 answers

Sia ? 4 years, 6 months ago

Please ask question with complete information.

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Find the area of the sector of a circle with radius 6cm if angle of sector is 60 degree

Posted by Dhanshree Mane 4 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Bipin Kumar 4 years, 6 months ago

πr² thetha /360°= 22/7×6×6×60°/360°= 22/7×6=132/7=18.8 cm².

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Incredible Foxtrot 4 years, 6 months ago

Put the value in the formulas πr^2× theta upon 360 we get 132/7 which is 18.857 cm square

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Sides of triangle are given below. Determine whether it is right triangle or not 13,12,5

Posted by Dhanshree Mane 4 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Incredible Foxtrot 4 years, 6 months ago

By converse of Pythagoras theorem we get 12 square plus 5 square = 13 square . Therefore it is a right angled traingle .

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उपेंद्र वर्मा 4 years, 6 months ago

Yes the gives sides can form right angle

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A tangents PQ at a point P of a circle with center O .are inclieded to each other angleb of 80 degere . Then find angle POA

Posted by Dhanshree Mane 4 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Abishai Nathan 4 years, 6 months ago

Ans=?POA=50*

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Aakash Anand 4 years, 6 months ago

❤radius is perpendicular on tangent at the point of contact # OP perpendicular PQ Their for Angle OPQ = 90* # Give Angle PQO= 80* ... ?In ?triangle OPQ # ?p + ?Q + ?O = 180* {Angle sum property } # 90* + 80* + ?O = 180* # 170 + ?0 = 180* ❤Angle O = 10* ... Answer ,.............. Aakash Anand ?

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Sides of a two similar triangle are the ratio 4:9 . Find the areas of the triangle in the ratio

Posted by Dhanshree Mane 4 years, 6 months ago

CBSE > Class 10 > Mathematics

3 answers

Abishai Nathan 4 years, 6 months ago

16/81

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Unknown . 4 years, 6 months ago

Given: the ratio of sides is 4:9 Solution: Let there are two triangles ABC and PQR similar to each other Where AB/PQ=4/9 According to theorem 6.6 which states that the ratio of areas of similar triangles is equal to the square of the ratio of their sides Hence, ar(ABC)/ar(PQR)=(AB/PQ)² =(4/9)² =(16/81) Therefore, the ratio of the areas of given triangles is 16:81 Hope this helps u!!! One more thing this(theorem 6.6) is deleted from the syllabus od 2020-2021 as 30percent syllabus is reduced ???

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उपेंद्र वर्मा 4 years, 6 months ago

16/81

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What is an , l, n and nth term

Posted by Swikruti Mohanty 4 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Swikruti Mohanty 4 years, 6 months ago

Okay thank you

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Incredible Foxtrot 4 years, 6 months ago

Here l is the last term of the ap. And n is term of any no. In ap. And nth term is usually denotes to the whole ap sequence.

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ABC and BDE are two equilateral such that D is the mid point of BC . Find the ratio of these areas triangle ABC and BDE

Posted by Dhanshree Mane 4 years, 6 months ago

CBSE > Class 10 > Mathematics

2 answers

Abishai Nathan 4 years, 6 months ago

4:1

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Adithya Dev A 4 years, 6 months ago

ar (ΔABC)/ar (ΔBDE) = 4:1.

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Find the values of k for given quadric equation, so that have equal roots : 2x^2+is+3 =0

Posted by Dhanshree Mane 4 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 4 years, 6 months ago

Please ask question with complete information.

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If 2 and -3 are the zeroes of the quadric polynomial x^2+(a+1)x+b then values of a and b

Posted by Dhanshree Mane 4 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Incredible Foxtrot 4 years, 6 months ago

Putting 2 as p(2) as 2 is a zero of this quadratic polynomial.we get 2a +b = -6 as first equation. Put -3 as p(-3) as -3 is another zero of this quadratic polynomial.we get 3a - b = 6 as second equation. Adding these equations we get a= 0 and after that put a in first we get b= -6

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What are advantages of networking

Posted by Anshika Gupta 4 years, 6 months ago

CBSE > Class 10 > Information Technology (402)

2 answers

Susmitha Susmitha 4 years, 5 months ago

The advantages of networking are:- 1. Efficient use of storage media. 2. Preserving information 3. Reduction in hardware costs. 4. Efficiency 5. Redundancy 6. Quickest document delivery

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Ridhima Yadav 4 years, 6 months ago

There are many advantages of networking Networking= Networking is the process of connecting the one communication to an other communications like computer, laptop, mobile phone,tablet, satellite and etc. 1] It is help to use in connect the one computer to an other computer. 2] It is use in mobile phone ? also . 3] Without network we cannot do any business work . 4] Without network we cannot talk to each other . which person is leave far with us.

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What is rarer medium and denser medium

Posted by Swikruti Mohanty 4 years, 6 months ago

CBSE > Class 10 > Science

4 answers

Swikruti Mohanty 4 years, 6 months ago

Thank you all

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Saurabh Singh 4 years, 6 months ago

The medium with high optical density is called denser medium The medium with low optical density is called rarer medium

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Adithya Dev A 4 years, 6 months ago

A medium with low optical density is known as an OPTICALLY RARER medium. This medium has lower refractive index and speed of light is high here. Whereas, a medium with high optical density is known as an OPTICALLY DENSER medium. This medium has higher refractive index and speed of light is low here. Eg :- Air is an optically RARER medium and diamond is an optically DENSER medium.

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उपेंद्र वर्मा 4 years, 6 months ago

The medium in which light bends towards the normal is known as denser medium and in which it moves away from the normal it is known as rarer medium, for example- air is rarer and water is denser medium as compared both of them.

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How are oxygen and carbon dioxide transported in human beings?

Posted by Nisa Saini 4 years, 6 months ago

CBSE > Class 10 > Science

5 answers

Saurabh Singh 4 years, 6 months ago

Oxygen transported through RBCs which contain heamoglobin

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Nisa Saini 4 years, 6 months ago

Kyo btao dear

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Adithya Dev A 4 years, 6 months ago

Transportation of respiratory gases in humans takes place in the blood. When O2 is transported from alveoli to cells through Red Blood Cells using haemoglobin, the red coloured respiratory pigment, CO2 is transported in dissolved form through blood plasma back to the alveoli.

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Nisa Saini 4 years, 6 months ago

Thank you ??

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Swikruti Mohanty 4 years, 6 months ago

Oxygen is transported by rbc

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C4H10+O2gives CO2+H2O

Posted by Vaibhav Pratap Singh 4 years, 6 months ago

CBSE > Class 10 > Science

4 answers

Adithya Dev A 4 years, 6 months ago

2 C4H10 + 13 O2 ----> 8 CO2 + 10 H2O.

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Bipin Kumar 4 years, 6 months ago

Yeah But it to be balanced.

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Saurabh Singh 4 years, 6 months ago

Galat hai

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उपेंद्र वर्मा 4 years, 6 months ago

All the carbon compounds burn in air produces carbon dioxide and water vapour. Heat and light energy also releases in this process and this reaction is known as combustion reaction.

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Why was Gandhi ji started non-corporation movement?

Posted by Mehak Sharma 4 years, 6 months ago

CBSE > Class 10 > Social Science

1 answers

Ajay Topno 4 years, 6 months ago

Because of janilluabag incident 2. Rowlat act 3.khalifat movement

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ANSWER

The given figure consists of four small semi circles of equal radii and two big set in circles of equal radii is 42 cm find the perimeter of the shaded region

Posted by Lovely Singla 4 years, 6 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

What do you mean by database management system

Posted by Jyoti Pandey 4 years, 6 months ago

CBSE > Class 10 > Information Technology (402)

2 answers

Hey Kriti 4 years, 5 months ago

Database management system is a record keeping system widely used by different organisations for maintaining, manipulating and managing records. It provides security. It prevents data rebundancy.

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Ricky Tomar 4 years, 6 months ago

Data base management allows to person to organize store

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read the information given below and select the correct options sheela needs ioan to set up a papad making factory on what basis will sheela decide to borrow from the bank, a) the rate of interest is low. b) easy mode of repayment c) option a and b are correct d) option a and b are incorrect. Need this ??

Posted by Niku Saraswat 4 years, 6 months ago

CBSE > Class 10 > Social Science

2 answers

Anshika Gupta 4 years, 6 months ago

Sorry both b and a are correct

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Anshika Gupta 4 years, 6 months ago

B option

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ANSWER

Rain water harvesting

Posted by Md. Nizamuddin Ansari 4 years, 6 months ago

CBSE > Class 10 > Science

1 answers

Bipin Kumar 4 years, 6 months ago

Rain water harvesting is the physical process that is social work for fulfilment of water requirements by saving rain water.

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What is the name of first chapter

Posted by Aayush Sahu 4 years, 6 months ago

CBSE > Class 10 > Information Technology (402)

4 answers

Nancy Rajput 4 years, 5 months ago

Methods of communication

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Krish Kumar Singh 4 years, 6 months ago

Communicationnnnnnnnnnsjdn

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Saloni Prajapati 4 years, 6 months ago

Communication

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Sania Sahu 4 years, 6 months ago

Web accessibility

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मुझसे अब चला नहीं जाता वाच्य बताइए

Posted by Aaaaaaa Pppppppp 4 years, 6 months ago

CBSE > Class 10 > हिंदी ए

1 answers

Arnav Bhai 4 years, 6 months ago

भावाच्य

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Please give me some important question in English class 10 th

Posted by Sneha Giri 4 years, 6 months ago

CBSE > Class 10 > English Language and Literature

1 answers

Arnav Bhai 4 years, 6 months ago

What is the rhyming scheme for, "The Ball Poem"? What type of a poem is it called when you observe its rhyming scheme?

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Guys kya aap ko bhi lgta h ki exam postponed ya cancel honge? Bcz life is most important than exam ................ Aap logo ki is question ko lekr kya rxn h plzz comment krke btao.....now the big revolution is start

Posted by Itachi Uchiha ? 4 years, 6 months ago

CBSE > Class 10 > Mathematics

3 answers

Dp Preetish 4 years, 6 months ago

Canceling the exam is not excuse I’m taken 92% (second ranked ) in 10th So I can give the exam but exam is not that much important than life if students were affected by covid 19 dose government will take the responsibility weekend are not having the age to take vaccine and this generation students not having that much strong immune system by that generation so I’m not saying to cancel the exam I’m just saying postponement or do the normal way how we writed in 9th class or put exam only for 12th and cancel 10th exam 12 is more important than 10

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Mahi Jain 4 years, 6 months ago

Cancel to nhi honge

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Abishai Nathan 4 years, 6 months ago

Most Probally it'll postponed

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