CBSE > Class 10 > Science | CBSE Board | Homework Help

Astigmatism; It is an eye defect in which a person cannot simultaneously see both the horizontal and vertical views of an object with the same clarity. Cause; It arise due to irregular curvature of the cornea It can be corrected by using a cylindrical lens

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Differences between voltaic cell and dry cell

Posted by Aetukuri Charani 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 11 months ago

A voltaic cell has a liquid electrolyte- dilute sulphuric acid whereas a dry cell has a pasty electrolyte- mixture of ammonium chloride, coke and a little water and manganese dioxide.

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What are the special features which protect the brain

Posted by Mitra Suresh 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Shreya S❤ 5 years, 11 months ago

Meninges And Csf And Skull

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Vidhi Kamboj 5 years, 11 months ago

1st is skull which is made up of hard bones and under that there are 3 layers present in our brain and after that a fluid is present to prevent the brain from a shock and when we jump, etc. ....

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ANSWER

Graphite is a good conductor of electricity, while diamond and carbon compounds do not conduct electricity. Give reason.

Posted by Pragya Thapa 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Shivang Sharma 5 years, 11 months ago

Because graphite has some "free" electrons in outer most shell whereas cabon and other allotropes of it do not have free electron in outer most shell that's why graphite conduct electricity

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Heredity and evolution i dont understand so plzz help .

Posted by Nisha Agarwal 5 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Nisha Agarwal 5 years, 11 months ago

Shivang reply me

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Nisha Agarwal 5 years, 11 months ago

Also plzz recommend me any links or guidelines for life processes.

1Thank You

Nisha Agarwal 5 years, 11 months ago

Can you plzz help me in evolution topic..?

1Thank You

Shivang Sharma 5 years, 11 months ago

Tell me I try to solve your problem

1Thank You

Shivang Sharma 5 years, 11 months ago

What problem you face in this chapter

5Thank You

ANSWER

How do metallic character, change in a group of Modern Periodic table on going top to bottom

Posted by Shubh Preet 5 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Shivang Sharma 5 years, 11 months ago

Tell whoes ans you most probably like

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Diksha? 5 years, 11 months ago

Metallic character increases down a group

0Thank You

Shivang Sharma 5 years, 11 months ago

Metallic character increases downward

2Thank You

Mariana Chhetri 5 years, 11 months ago

The metallic character decreases

1Thank You

ANSWER

The density of water is maximum at a)0 b)100c) 4 d)25

Posted by Bawani Yadav 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Shivang Sharma 5 years, 11 months ago

4 degree celcius

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Potential difference between live wire and neutral wire is..........

Posted by Piyush Kr.?? 5 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Riya Rathore 5 years, 11 months ago

220v and 50 hz in india well in America 60 hz

1Thank You

Mohit Sharma 5 years, 11 months ago

In India potential difference of live wire is 220V and of neutral wire is 0V

1Thank You

Shivang Sharma 5 years, 11 months ago

Live wire carry current of high voltage as we know that energy never be destroyed neutral wire carry current from appliance

1Thank You

Miss. 1234 5 years, 11 months ago

220 V in India

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ANSWER

I wamt sciemce experiments photos

Posted by Black Star Gaming 5 years, 11 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Ch 10 numericals solution

Posted by Arshdeepsidhu Brar 5 years, 11 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

In a battle population the numder of green beetles is more than blue and beetles .give a reasion behind this situation?

Posted by Sandeep Kushwaha 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Piyush Kr.?? 5 years, 11 months ago

Green beetles are more because animals can see blue and red beetles only and cannot see green beetles as the colour of beetles and colour of grass both is same and so they can eat only red and blue beetles...

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What is the direction of magnetic field inside the magnet

Posted by As Y 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Ranjeet Kumar 5 years, 11 months ago

South to north

1Thank You

ANSWER

Explain in word what is mean by volt

Posted by Aksheyaa Kannanbanu 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Piyush Kr.?? 5 years, 11 months ago

A potential of one volt appears when current of one ampere flows through a resistance of 1 ohm...

2Thank You

Aksheyaa Kannanbanu 5 years, 11 months ago

Volt

2Thank You

ANSWER

differentiate between anodising and galvanisation.

Posted by Anu Priya 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Piyush Kr.?? 5 years, 11 months ago

Anodising is an electrochemical process in which surface of a metal is changed into corrosin resistant and decorative...whereas galvanisation is a process in which zinc layer is coated on metal surface to resistance from corrosion...

0Thank You

Piyush Kr.?? 5 years, 11 months ago

Anodising and Galvanisation

1Thank You

ANSWER

Who like the BIOLOGY ?

Posted by Parampal Singh 5 years, 11 months ago

CBSE > Class 10 > Science

59 answers

As Y 5 years, 11 months ago

I like the biology subject

1Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 11 months ago

0Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 11 months ago

Hn ni dekha hoga.....m jse aaya.....tum gyi....

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Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 11 months ago

??????

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Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 11 months ago

M v tha

2Thank You

꧁༒Ķïłłěŕ_Ṩนℑåł༒꧂, Sharma 5 years, 11 months ago

Mujha biology bhot bhot jyda psnd hai hi nahi????????????

1Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 11 months ago

Haan hlo....brainly pr thi n....avi

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Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 11 months ago

Hlw diksha ???

1Thank You

Dr. Sanskari ?‍⚕️?‍⚕️ 5 years, 11 months ago

BIOLOGY IS MY FVRT SUBJECT ???‍⚕️?‍⚕️

3Thank You

Miss. 1234 5 years, 11 months ago

hum 10th students h itti jldi kon sota h??????....

3Thank You

Mr.Xxx ??? 5 years, 11 months ago

Sweet dreams ???

2Thank You

Deeksha Singh 5 years, 11 months ago

Thankyou so much friends ??

2Thank You

Miss. 1234 5 years, 11 months ago

thnks and same2u??....bye gn Shivansh science...?

2Thank You

Mr.Xxx ??? 5 years, 11 months ago

Bye miss maths ,see you tomorrow ? good night ?

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

You to miss best of luck ?

2Thank You

Mr.Xxx ??? 5 years, 11 months ago

Hmm ??

1Thank You

Miss. 1234 5 years, 11 months ago

Best of luck Deeksha!!! Do ur best✌️✌️✌️????????

2Thank You

Deeksha Singh 5 years, 11 months ago

Mera to abhi 6 Feb ko finish hoga

2Thank You

Miss. 1234 5 years, 11 months ago

hmara ni aaya abhi?

2Thank You

Mr.Xxx ??? 5 years, 11 months ago

Good ??

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

Hamare 2nd ke results aa gae

1Thank You

Miss. 1234 5 years, 11 months ago

Mere toh preboard finish ho gye....✌️✌️✌️....bss ab admit card aur practicals ho jaye....???phir mai school ni jaungi admit card milne ke baad?sidha board exam✌️

2Thank You

Deeksha Singh 5 years, 11 months ago

Mera to second preboard start ho gya aaj se?

2Thank You

Miss. 1234 5 years, 11 months ago

yup ?

2Thank You

Mr.Xxx ??? 5 years, 11 months ago

Oo aap bhi ja rahi ho

1Thank You

Miss. 1234 5 years, 11 months ago

means okk?

2Thank You

Mr.Xxx ??? 5 years, 11 months ago

Mtlb

1Thank You

Miss. 1234 5 years, 11 months ago

kk..

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

Kaha chale

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

Achha mere to marks aa gae hai

1Thank You

♛ ❝Ѕυнαɴα❞ ♛ 5 years, 11 months ago

Byee!!?

1Thank You

Miss. 1234 5 years, 11 months ago

Ooo...

2Thank You

♛ ❝Ѕυнαɴα❞ ♛ 5 years, 11 months ago

Mera result ni aya abhi

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

Oho

1Thank You

♛ ❝Ѕυнαɴα❞ ♛ 5 years, 11 months ago

Mere sath toh sab aajiib hi hh 8th class tk meri maths achchi thi.. . Fir school change kiya aur new school 9th se meko science achchi lgti hh???????

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

??????

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

Hmm

1Thank You

Miss. 1234 5 years, 11 months ago

kon kisse bol rha hai???!!....

1Thank You

Miss. 1234 5 years, 11 months ago

phir hme kese show ho rhe???

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

Preboards ke result to achhe nahi hai,tumhare preboards ka kya hua

1Thank You

Miss. 1234 5 years, 11 months ago

Hii Suhana... what's up?!

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

Thik hi hai

1Thank You

♛ ❝Ѕυнαɴα❞ ♛ 5 years, 11 months ago

Mere answers show ni hore..??

1Thank You

Miss. 1234 5 years, 11 months ago

and i love Maths ?❣️❣️

1Thank You

♛ ❝Ѕυнαɴα❞ ♛ 5 years, 11 months ago

???ab padhai kesi chl rahi h tumhari.... N hii miss

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

Yep I love science ?

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

???

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

Awesome ? ?

1Thank You

Miss. 1234 5 years, 11 months ago

Hii shivansh science?

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

Hlo miss maths

1Thank You

♛ ❝Ѕυнαɴα❞ ♛ 5 years, 11 months ago

U??

1Thank You

Miss. 1234 5 years, 11 months ago

2Thank You

♛ ❝Ѕυнαɴα❞ ♛ 5 years, 11 months ago

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

How are you ?

1Thank You

♛ ❝Ѕυнαɴα❞ ♛ 5 years, 11 months ago

??? hello

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

*bestie

1Thank You

Mr.Xxx ??? 5 years, 11 months ago

Hlo beatie

1Thank You

♛ ❝Ѕυнαɴα❞ ♛ 5 years, 11 months ago

Me...??

2Thank You

Mr.Xxx ??? 5 years, 11 months ago

Me!!!!!!

1Thank You

ANSWER

When the objet is placed at centre of curvature of concave mirror then the position of image at?

Posted by Parampal Singh 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Mr.Xxx ??? 5 years, 11 months ago

Great yogita

1Thank You

Yogita Ingle 5 years, 11 months ago

When an object is placed at the center of curvature and focus, the real image is formed at the center of curvature. The size of the image is same as compared to that of the object.

1Thank You

ANSWER

Who discovered A.C current?

Posted by Parampal Singh 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Laxita Tyagi 5 years, 11 months ago

u discover A.C

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Yogita Ingle 5 years, 11 months ago

Tesla designed the alternating-current (AC) electrical system, which would quickly become the preeminent power system of the 20th century and has remained the worldwide standard ever since.

1Thank You

ANSWER

Who discovered the magnetic effect of current ?

Posted by Parampal Singh 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 11 months ago

In 1820 the theory of the magnetic effect of electric current was discovered by H.C Oersted. This concept actually means that the flow of an electric current through a conductor produces a magnetic field around it.

1Thank You

Miss. 1234 5 years, 11 months ago

H.C. Oersted

3Thank You

ANSWER

What is constant for coulumbs law

Posted by Nikhil Raj 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Yogita Ingle 5 years, 11 months ago

‘k’ is a constant that depends on the medium in which charged objects are placed. In S.I. system, as well as in M.K.S. system k=1/4πε_oε_r.

1Thank You

Miss. 1234 5 years, 11 months ago

i think coulomb's law is not in our 10th class book.... we've only Ohm's law in which the Temperature remains constant...

1Thank You

ANSWER

If one of the metal present in an alloy in mercury then it is called????

Posted by Abhishek Pandey 5 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Laxman Singh 5 years, 11 months ago

Amalgam

0Thank You

Abhishek Pandey 5 years, 11 months ago

Wrong answer ?????

1Thank You

Hemangi Ranjan 5 years, 11 months ago

Amalgam

0Thank You

Chayanika Dutta 5 years, 11 months ago

Amalgam

0Thank You

ANSWER

What is the function of galvanometer in a circuit

Posted by Abhishek Pandey 5 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Laxita Tyagi 5 years, 11 months ago

right

0Thank You

Miss. 1234 5 years, 11 months ago

The function of galvanometer is to detect the presence of current in a circuit and it also detects the direction of current.

4Thank You

ANSWER

Why milkman add baking soda in milk?

Posted by Hardik Chhikara 5 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Faisal Shaikh 5 years, 11 months ago

It may not get sour due to the presence of lactic acid in it

0Thank You

Abad Shaikh 5 years, 11 months ago

It is done to prevent the formation of lactic acid which spoils the milk

0Thank You

Neha Jain 5 years, 11 months ago

So that milk can be prevented from cuddling

1Thank You

Miss. 1234 5 years, 11 months ago

Baking soda is a base. It is added to fresh milk to prevent the curdling of milk because it neutralise the lactic acid produced in the milk by the action of bacteria. ... This is why the milkman adds baking soda in milk

3Thank You

ANSWER

Which compound maintain permanent hardness of water??

Posted by Prachi Sharma 5 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Prachi Sharma 5 years, 11 months ago

Okk

0Thank You

Nikhil Raj 5 years, 11 months ago

Washing soda

1Thank You

Shreya S❤ 5 years, 11 months ago

Calcium and magnesium salts maintain hardness of water Baking soda REMOVES parmanent hardness.....

1Thank You

Bhavik Naik 5 years, 11 months ago

Washing soda

2Thank You

ANSWER

Sir who many pratical questions will come or on which of the chapter

Posted by Priyanshu Parihar 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Miss. 1234 5 years, 11 months ago

practical questions will be asked from the practical file which u have made in maths or in science both....?and no one is sir here! All r students like u...

0Thank You

ANSWER

Which metal is the best conductor of heat

Posted by Abhishek Mahar 5 years, 11 months ago

CBSE > Class 10 > Science

8 answers

Abad Shaikh 5 years, 11 months ago

Silver

0Thank You

Nikhil Raj 5 years, 11 months ago

Silvar

0Thank You

Parishi Thada 5 years, 11 months ago

Silver

0Thank You

Neha Jain 5 years, 11 months ago

Copper

0Thank You

Prachi Sharma 5 years, 11 months ago

Copper

0Thank You

Miss. 1234 5 years, 11 months ago

Silver and copper

3Thank You

Niraj Kumar 5 years, 11 months ago

Aluminum

1Thank You

Niraj Kumar 5 years, 11 months ago

Copper

1Thank You

ANSWER

The mental toppers of10thA

Posted by Siddhant Thakur 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Deeksha Singh 5 years, 11 months ago

What you mean?

0Thank You

ANSWER

How to score 90%in 10th board

Posted by Bkm . 5 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Abhishek Pandey 5 years, 11 months ago

Last 10year solved board paper

0Thank You

ANSWER

Different between bio mass and hydro electricity

Posted by Komal Choudhary 5 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Yogita Ingle 5 years, 11 months ago

a) Both Bio-mass and Hydro-Electricity are renewable sources of energy.

b) The use of bio-mass by burning causes air pollution but the use of hydroelectricity do not.

c) Bio-mass gives heat energy which can be used for cooking and heating whereas hydroelectricity can be used for running all types of electrical appliances.

d) Bio-mass energy can be obtained without using any special devices but hydroelectricity can be produced only by establishing hydro-power plants.

0Thank You

Shiri Sengar 5 years, 11 months ago

0Thank You

Miss. 1234 5 years, 11 months ago

sorry the answer is ...??..Biomass and hydroelectricity are different in many aspects. Hydroelectricity is generated using the kinetic energy from moving water, while the energy from biomass is generated by decomposition of farm waste. Since biomass is composed of organic compounds so energy from biomass results in air pollution. Hydroelectricity, on the other hand, is pollution free.

0Thank You

Miss. 1234 5 years, 11 months ago

10 Science Sources of Energy NCERT Exercise Solution What are the limitations of extracting energy from: Wind Answer: Large tract of land is required for establishment of wind farms. They can be established only at those places where wind speed is high enough. Initial cost of establishing a wind farm is very high and the cost of maintenance is also high. Waves Answer: Energy from waves can be harnessed only at selected places; only in coastal areas. Tides Answer: Energy from tides can be harnessed only at selected places; only in coastal areas. Technologies for harnessing energy from waves and tides are still at experimental stage and hence are less efficient and very costly. Prev Source of Energy Non-conventional Energy InText Solution NCERT Solution Quiz Next A solar water heater cannot be used to get hot water on A sunny day A cloudy day A hot day A windy day Answer: (b) A cloudy day Which of the following is not an example of a bio-mass energy source? Wood Gobar-gas Nuclear energy Coal Answer: (c) Nuclear energy Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy? Geothermal energy Wind energy Nuclear energy Bio-mass Answer: (c) Nuclear Energy Compare and contrast fossil fuels and the Sun as direct sources of energy. Answer: Sun is the direct source of energy, while fossil fuels are formed because of the solar energy stored in them. When green plants prepare food, they convert the solar energy into chemical energy which is stored in the form of biomass. The same biomass gets transferred to the animals. Thus, the energy in the form of biomass which is stored in fossil fuels has come from the sun. Compare and contrast bio-mass and hydroelectricity as sources of energy. Answer: Biomass and hydroelectricity are different in many aspects. Hydroelectricity is generated using the kinetic energy from moving water, while the energy from biomass is generated by decomposition of farm waste. Since biomass is composed of organic compounds so energy from biomass results in air pollution. Hydroelectricity, on the other hand, is pollution free.

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