CBSE > Class 10 | CBSE Board | Homework Help

If tanA = 1/√3 Than In triangle by pytagoreous theoream hypoteneous = 2 . . Than in triangle ABC sinA = 1/2 SinC = √3/2 CosA = √3/2 CosC = 1/2 . . A/Q = (1/2*1/2)+(√3/2*√3/2) = 1/4+3/4 = 4/4 = 1

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Why carbon form covalent bonf

Posted by Poorv Jain 5 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Aaditya Singh 5 years, 11 months ago

Because of it being tetravalent.

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Shubham Pal 5 years, 11 months ago

Carbon has only four electrons. And it has no space to take more electrons from any metallic substance. And it has also no more energy to produce their electrons. So it form covalent bond.

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Vinay Thakur 5 years, 11 months ago

Carbon has a property of catenation,polymerization

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Yogita Ingle 5 years, 11 months ago

Carbon is not good at fully giving up or taking away electrons from a nucleus.
Its electronegativity is around in the middle in the periodic table.
It is more energetically favorable to share the electrons between the atoms and to donate and accept electrons.
Carbon has 4 electrons in its outermost shell (and because each covalent bond requires a donation of 1 electron, per atom, to the bond) carbon has exactly four bonds to make, and is only stable if all 4 of these bonds are used.

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Ayush Rathi 5 years, 11 months ago

Carbon has 4 electrons in its outermost shell. ... Therefore, carbon completes its octet by sharing its 4 electrons with other carbon atoms or with atoms of other elements and forms covalent bond. It forms strong covalent bonds because of its small size.

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Kese ho sare k sare jai shree ram

Posted by Hiten Gurjar 5 years, 11 months ago

CBSE > Class 10 > हिंदी ब

6 answers

Aarav Agarwal 5 years, 11 months ago

Bye bro

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Chanchal Patel 5 years, 11 months ago

Hello

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Dr. Shreyas Samarth 5 years, 11 months ago

Radhe Radhe ??

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Dr. Shreyas Samarth 5 years, 11 months ago

Jai shree Ram ??

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Priya Ji 5 years, 11 months ago

Fine

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Tapondhi Sharma 5 years, 11 months ago

Hlo

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When we run why i did cramps

Posted by Technical Sohaik 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 11 months ago

Muscle cramp is an involuntary sudden contraction of muscle. Muscle cramps are caused due to over usage of muscle i.e. long run, rapid exercise etc. Cramps are also caused due to dehydration, muscle strain, holding in position for a long time.
After a strenuous exercise muscles experience lack of oxygen. In the absence or insufficiency of oxygen, they respire anaerobically thereby producing lactic acid. The accumulation of lactic acid causes cramps in muscles.

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Dr. Shreyas Samarth 5 years, 11 months ago

We got cramps due to excess secretion of lactic acid in r muscles......

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Sin18 /cos72 evaluate

Posted by Yash Kumar 5 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Jay Darji 5 years, 11 months ago

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Aakriti Kumari 5 years, 11 months ago

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Ayush Rathi 5 years, 11 months ago

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Define math in three sentences.

Posted by Ravi Naulakha 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Abhay Chauhan 5 years, 11 months ago

Wtf

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Some tricks to fill the map of geography, its very confusing guys ... pls help me...

Posted by Jais Priya 5 years, 11 months ago

CBSE > Class 10 > Social Science

0 answers

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In the figure, DE//BC, DE = 3cm, BC = 9cm and ar(∆ADE)= 30cm2 .Find the ar (BCED)

Posted by Abhishek Kumar 5 years, 11 months ago

CBSE > Class 10 > Mathematics

1 answers

Aadya Singh ? 5 years, 11 months ago

240 cm square...

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Where can I find the solutions of vyakaran notan sudha ?

Posted by Isha Sharma 5 years, 11 months ago

CBSE > Class 10 > हिंदी ब

0 answers

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A battery of 9 V is connected in series with resistors of 0.2 ohm, 0.3 ohm, 0.4 ohm, 0.5 ohm and 12 ohm. How much current would flow through the 12 ohm resisto? Show solution with a diagram.

Posted by Rukhsar Malik 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Aadya Singh ? 5 years, 11 months ago

Effective resistance = 0.2 + 0.3 + 0.4 + 0.5 + 12 = 13.4 ohm.
By ohm law, I = V/R
9/13.4 = 0.67 A
All the resistance are connected in series. Hence, the current across 12 ohm resistance is 0.67A .

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What are pressure groups? Explain with examples.

Posted by ✍️✍️✍️ ? 5 years, 11 months ago

CBSE > Class 10 > Social Science

1 answers

Yogita Ingle 5 years, 11 months ago

Pressure groups are the organisations that attempt to influence government policies. These organisations are formed when people with common occupation, interest, aspirations and opinions come together in order to achieve a common objective.

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A wire that has resistance R is cut into two equal pieces. The two parts are joined in parallel. What is the resistance of the combination? Show answer with solution.

Posted by Rukhsar Malik 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

✍️✍️✍️ ? 5 years, 11 months ago

Each part of the wire to will have R/2 resistance. When joined in parallel combination: 1/R parallel= 1/R/2 + 1/R/2 = 2/R + 2/R = 4/R R parallel = R/4

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please provide me the discription of all pictures in civics book class 10

Posted by Narender Kumar 5 years, 11 months ago

CBSE > Class 10 > Social Science

0 answers

ANSWER

Why why the sun appears reddish during sunrise and sunset

Posted by Rahul Sharma 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Aaditya Singh 5 years, 11 months ago

The basic phenomenon here is scattering of light. Rest u can find the answer everywhere, whether reference or on quora, brainly and other such sites.

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Yogita Ingle 5 years, 11 months ago

Sun is at the farthest distance during sunset and sunrise.the white light from the sun gets scattered as it travels towrds the earth. The blue colour gets scattered the most, the lightreaching teh eye has white light minus blue light scattered away. red light which is relativley less scattered reaches us the max. hence the sun appears red.

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What is atomic mass ? and what is atomic number?

Posted by Dinesh Kumar 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Yogita Ingle 5 years, 11 months ago

Atomic Number

The total number of protons in the nucleus of an atom gives us the atomic number of that atom.
It is represented with the letter ‘Z.’
All the atoms of a particular element have the same number of protons, and hence the same atomic number.
Atoms of different elements have different atomic numbers.
For example, all carbon atoms have the atomic number of 6, whereas all atoms of Oxygen have 8 protons in their nucleus.

Mass Number

The number of protons and neutrons combined to give us the mass number of an atom.
It is represented using the letter ‘A.’
As both protons and neutrons are present in the nucleus of an atom, they are together called nucleons.
For example, an atom of carbon has 6 protons and 6 neutrons. Thus, its mass number is 12.
While the number of protons remains the same in all atoms of an element, the number of neutrons can vary. Thus, atoms of the same element can have different mass numbers, and these are called isotopes.

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What is dental plaque?

Posted by Dinesh Kumar 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Sanket Arjun 5 years, 11 months ago

It the teeth not cleaned regularly then teeth covered with a thin yellowish layer of food particles and bacteria cells, it is known as dental plaque

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If triangle pQR is right angled at p, then sin angle Q+angle R is

Posted by Najiya Shirin 5 years, 11 months ago

CBSE > Class 10 > Mathematics

2 answers

Aaditya Singh 5 years, 11 months ago

1. Because sin(Q+R)= sin90 =1

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Ravi Naulakha 5 years, 11 months ago

Angle Q+r=90 because sum of angle of triangle is 180. Sin90 is 1

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Write an article on the topic in this world full of chaos people often ten forget about themselves

Posted by Vartika Singh 5 years, 11 months ago

CBSE > Class 10 > English Language and Literature

0 answers

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What are the important question to study for IT of class 10

Posted by Inder Kumar 5 years, 11 months ago

CBSE > Class 10 > Computer Applications (165)

2 answers

Arsh Agarwal 5 years, 11 months ago

IF YOUR SYLLABUS IS COMPLETED THEN DO READ THE SAMPLE PAPERS ONLY

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Aaditya Singh 5 years, 11 months ago

Bro don't take stress about IT.

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What ia the probability of sunday in a leap year

Posted by Harish Verma 5 years, 11 months ago

CBSE > Class 10 > Mathematics

3 answers

Aaditya Singh 5 years, 11 months ago

2/7.

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Yogita Ingle 5 years, 11 months ago

In a leap year, total number of days = 366 days.

In 366 days, there are 52 weeks and 2 days.

Now two days may be

(i) Sunday and Monday

(ii) Monday and Tuesday

(iii) Tuesday and Wednesday

(iv) Wednesday and Thursday

(v) Thursday and Friday

(vi) Friday and Saturday

(vii) Saturday and Sunday

Now in total 7 possibilities, Sunday and Monday both come together is 1 time.

So probabilities of 53 Sunday and Monday in a leap year = 1/7

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Venkada Laxmi 5 years, 11 months ago

2 by 7

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Highlight the prudential reasons for powee sharing

Posted by Gourav Sen 5 years, 11 months ago

CBSE > Class 10 > Social Science

2 answers

Nikhil Nicks 5 years, 11 months ago

1.)Democracy is desirable because it reduces conflicts between different social communities .Since, social conflict often lead to violence and political instability. 2.)Power sahring is good way to ensure the stability political order. 3.) Imposing the will of majority community over others may look like an attractive option in the short run, but for long run it undermines the unity of the nation.

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Venkada Laxmi 5 years, 11 months ago

Resolves conflict

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Hughlight the prudential reasons for power sharing

Posted by Gourav Sen 5 years, 11 months ago

CBSE > Class 10 > Social Science

2 answers

Yogita Ingle 5 years, 11 months ago

Prudential Reason: Power sharing helps in reducing the conflict between various social groups. Hence, power sharing is necessary for maintaining social harmony and peace.

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Priya Ji 5 years, 11 months ago

highlight *

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Distinguish between saturated hydrocarbons and unsaturated hydrocarbons with the help of combustion process

Posted by Anshika Gupta 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Sachin Tyagi 5 years, 11 months ago

Saturated Hydrocarbons are show incomplete combustion because carbon high. Unsaturated hydrocarbons shows complete combustion because carbon is less

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Which country established her power in Vietnam during the early phase of twentieth century?

Posted by Vedant Shetty 5 years, 11 months ago

CBSE > Class 10 > Social Science

1 answers

Meghna Thapar 5 years, 9 months ago

France established its power in vietnam. Vietnam got independence on 2nd september 1945

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A 21 m wide athletic track consists of two straight sections of 150m long joining semi circular ends of diameter 84m each find the area of track

Posted by Anil Sharma 5 years, 11 months ago

CBSE > Class 10 > Mathematics

0 answers

ANSWER

Define dicot seed

Posted by Himanshu Kothari 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 11 months ago

Dicot seed: The seed having two cotyledons is called dicot seed. For e.g., gram and bean seed.
On the basis of the presence or absence of endosperm, both in dicot and monocot seed, they are classified as endospermic or non-endospermic seeds.

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Alok Kymar 5 years, 11 months ago

Wheat

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