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

Variation is beneficial to the species but not necessarily for the individual because it helps species to survive adverse conditions but in individual it's not necessary that the individual will survive after adverse condition it may live or may die

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How does use of fuse wire protect electrical appliances

Posted by Satya Prakash 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Kriti Singh 4 years, 11 months ago

Fuse connect in series to the circuit to protect electrical appliances. If high voltage current pass through the circuit then fuse melt and breaks the circuit and protest other electrical appliances in the circuit..

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Differentiate between hard water and soft water

Posted by Riya Khari 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Surbhi Kumari 4 years, 11 months ago

Can, you please give me all chemical reaction of ch-1( chemistry) class-10

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Himanshu Yadav 4 years, 11 months ago

I am just joking about GF

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Rishi Bhai 4 years, 11 months ago

(1)Hard water contains calcium and magnesium ions whish is not found in soft water. (2) soft water conduct electricity more,as hard water (3) soft water is drinkable whereas hard water is dangerous to health

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What are advantages and disadvantages of building dams

Posted by @/<$#!T Just Own 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Himanshu Yadav 4 years, 11 months ago

Advantages of making dam are (1) threr is the supply of electricity to the factory and the of that area (2) farmer can do irrigation if dam is nera his filed. Disadvantages of bulinding dams are (1) The tribal community people's have to leave there house for making dam which they did not want (2) The water source for the tribal community is only the river so after building dam they did not get water

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Write down the law of reflection and refraction and also write uses of concave and convex mirror.

Posted by @/<$#!T Just Own 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Kriti Singh 4 years, 11 months ago

1st law of reflection- The incident ray,reflected ray and normal all lie in a same plane. 2nd law of reflection-Angle of incident equal to the angle of reflection. (<i=<r) 1st law of refraction-The incident ray ,refracted ray and normal to the interface of two transparent media at the point of incident ,all lie in a same plane 2nd law of refraction-The ratio of sin(<i )to the sin(<r)is constant Uses of concave mirror 1.It is used in torch light, headlight of vehicles 2.It is used as shavings mirror Uses of convex mirror 1.It is used as side view mirror in vehicle to see all the traffic behind . 2.It is used in jewellery shop and in telescope etc..

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Write a name of galaxy

Posted by Nivaran Singh 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Riya Khari 4 years, 11 months ago

Milky way

1Thank You

Trishank Kumar 4 years, 11 months ago

Andromeda

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@/<$#!T Just Own 4 years, 11 months ago

Messier 81, Messier 82 and black eye galaxy

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@/<$#!T Just Own 4 years, 11 months ago

Andromeda galaxy

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@/<$#!T Just Own 4 years, 11 months ago

Milky way

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Draw magnetic fields lines through a magnet and writes its properties.

Posted by @/<$#!T Just Own 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Himanshu Yadav 4 years, 11 months ago

Please download the app for notes in which you will get your answers of your questions

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Explain all the Mendel laws.

Posted by @/<$#!T Just Own 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Tanvi Tomar 4 years, 11 months ago

Law of dominance , Law of segregation and law of independent assartment

1Thank You

Bipin Bihari 4 years, 11 months ago

law of segregation

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Explain the versatile nature of carbon and draw the structure: H2O, CO2, NH3, O2 through covalent bonding.

Posted by @/<$#!T Just Own 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Rishi Bhai 4 years, 11 months ago

(iii) SMALL SIZE :- due to its small size , compound formed by carbon is stable

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Rishi Bhai 4 years, 11 months ago

Versatile nature of CARBON : (i)CATENATION :- the property of self-linking of atoms of an element through covalent bond in order to form long branch , cyclic or ring chain (ii) TETRAVALENCY :- carbon has 4 electron in outer most shell so carbon can form single bond , double bond and triple bond with other element as well as own atoms

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Explain ohm's law and also write the factors on which resistance of a material depends???

Posted by @/<$#!T Just Own 4 years, 11 months ago

CBSE > Class 10 > Science

3 answers

Kunal Thakur 4 years, 11 months ago

And nature of the material

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Kunal Thakur 4 years, 11 months ago

Resistance of material is depend many factors some are: 1) temperature,(2) restivity, (3) length and area if the conductor

1Thank You

Bipin Bihari 4 years, 11 months ago

according to the Ohm's law the potential difference across the two points is directly proportional to the current flowing through it and the resistance

1Thank You

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Define:(I ) vegetative propagation (ii) double fertilisation

Posted by @/<$#!T Just Own 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Sia ? 4 years, 6 months ago

Double fertilization occurs when one male nucleus fertilizes with an egg cell to form a zygote cell and the other male nucleus fuses with two polar nuclei to cause triple fusion. As these two types of fertilizations takes place at the same time in the ovule of the plant, it is known as double fertilization.

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Sia ? 4 years, 6 months ago

Vegetative propagation is an asexual method of plant reproduction that occurs in its leaves, roots and stem. This can occur through fragmentation and regeneration of specific vegetative parts of plants.

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Explain all the three steps involved in photosynthesis.

Posted by @/<$#!T Just Own 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

《Shivi》 Dubey 4 years, 11 months ago

1- Absorbing light energy by leaves. 2- Conversion of light energy into chemical energy. 3- Reduction of carbon dioxide into carbohydrates.

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Kriti Singh 4 years, 11 months ago

The steps involved in photosynthesis:- 1.Absorbing light energy by leaves through the chlorophyll 2.conversion of light energy into chemical energy and splitting of water into hydrogen and oxygen 3.Reduction of carbon dioxide into carbohydrates

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Two wires A and B are of equal length and have equal resistance. If the resistivity of A is more than that of B,which wire is thicker and why?

Posted by Kriti Singh 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Rishi Bhai 4 years, 11 months ago

Resistivity never different in same type of metal ,

1Thank You

Khushi 4 years, 11 months ago

I think , 'by the formula' is the right answer

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Kriti Singh 4 years, 11 months ago

Yes I am also confuse because by the formula R=rho L/A. Rho=RA/l Here,R and L are same So,Rho=A According to formula those wire which have more resistivity more thickness But,we know those wire which have low resistivity the flow of current through the wire is more,or more flow of current only through thick wire...... Yha by the formula or by the concept different answer aa rha h ..what is the right answer?

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Khushi 4 years, 11 months ago

As both the lengths are same and also the resistance of the wire and resistivity of wire A is higher than the other, the thickness of wire A should be more because more resistivity, more the thickness.

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Divya Bhardwaj 4 years, 11 months ago

Wire B is thicker as thick wire has less resistivity

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If proton is fixed than how can (+)ve charge move??

Posted by Ùjjàl Dãx 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Kriti Singh 4 years, 11 months ago

Positive charge doesn't move .Electron which have negative charge only move..

2Thank You

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What is the formula of sodium chloride

Posted by Tarana Panghal 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Divya Bhardwaj 4 years, 11 months ago

NaCl

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Vanshikha Bihare 4 years, 11 months ago

2Nacl

1Thank You

Harshil Garg 4 years, 11 months ago

NaCl

4Thank You

Harsh ✨ 4 years, 11 months ago

NaCl is the formula for Sodium chloride.

2Thank You

Afnan Majeed Parray 4 years, 11 months ago

Nacl

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How is transpiration pull responsible for upward movement of water

Posted by Juhan Karthick 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Bhavy Jain 4 years, 11 months ago

Water is lifted through ions from roots to all parts of the plant, it is unidirectional(lifts to 1 side only) . Water is transported through Xylem.

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An object of size 4cm is kept at a distance of 25 cm from a concave mirror of focal length 15 cm .find the distance of image,size and draw the ray diagram

Posted by ???????⚫ ⚪ 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Prateeek Chauhan 4 years, 11 months ago

Distance of images= -37.5cm Height of image= -6cm

2Thank You

ANSWER

Meaning of nationalism

Posted by Abhay Raj Tiwari 4 years, 11 months ago

CBSE > Class 10 > Science

4 answers

Abhay Raj Tiwari 4 years, 11 months ago

Finally done

0Thank You

Abhay Raj Tiwari 4 years, 11 months ago

Great

0Thank You

Abhay Raj Tiwari 4 years, 11 months ago

Bro

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Abhay Raj Tiwari 4 years, 11 months ago

Nice app

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What is lymph? Write its composition.

Posted by Sneha Sneha 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Aanya Jain 4 years, 11 months ago

Lymph is a colourless transporting fluid . The components of lymph are proteins

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What is galavnometer

Posted by Vansh Sharma 4 years, 11 months ago

CBSE > Class 10 > Science

5 answers

Divya Bhardwaj 4 years, 11 months ago

Galvanometer is a device which is used to detect small current in circuit

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Dhruv Jain 4 years, 11 months ago

Galvanometer is a device which is used to detect the correct present in the coil

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Manas Pradhan 4 years, 11 months ago

Galvanometer is an electromechanical Instrument

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Satyam Rai 4 years, 11 months ago

It is used to find small electric current

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Alka Rani 4 years, 11 months ago

Galvanometer is a device which is used to find small electric current.

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ANSWER

?? ?????? ?? ?????? ?? ? ???????? ?? 50 ?? ???? ??????? ???? ?? ????? ?????? 20 ??... ???? ??? ??????& ???????? ?? ???????

Posted by Rahul Chaudhary 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Good Day 4 years, 11 months ago

Focal length of concave mirror is negative. f=−20cm u=−50cm We know that : f1=v1−u1 −201=v1−−501 v=−14.3cm. The image is virtual, erect.

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Sneha Jaiswal Jaiswal 4 years, 11 months ago

Given f= - 20 cm u= - 50 cm v= ? By using lens formula 1/f = 1/v - 1/u 1/-20 =1/v - 1/-50 1/-20= 1/v + 1/ 50 1/-20 - 1/50 =1/v -75 - 10/150 =1/v -85/150 = 1/v -17/30 = 1/v v = -30/17 v = -1.76

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ANSWER

What do u mean by breathing

Posted by Naitik Karkhur 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Rohan Varshney 4 years, 11 months ago

Breathing is a life process. The process of inspiration and expiration is vital to provide oxygen to tissues and remove carbon dioxide from the body. The process of breathing is the moving of air in and out of the lungs facilitating gas exchange with the internal environment by taking in oxygen and flushing out carbon dioxide.

4Thank You

ANSWER

List of plants species found in Nagaland

Posted by Shivani Kevlani 4 years, 11 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Metal with water 10 questions

Posted by Ayush Parmar Ayush Parmar 4 years, 11 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

A students boils the water in an electric kettle for 20 minutes after being switched on. Using the same mains supply, he wants to reduce the boiling time of water. To do so, should he increase or decrease the length of the heating element? Justify your answer. Ans.The length of the wire should be increased because length is proportional to resistance and resistance is proportional to heat then if lenght is increased then heat will ne increased automatically. Is this answer correct

Posted by Sarvesh Kumar 4 years, 11 months ago

CBSE > Class 10 > Science

0 answers

ANSWER

Write the chemical equation involved in preparation of sodium hydroxide name the process

Posted by Manasvi Kulkarni 4 years, 11 months ago

CBSE > Class 10 > Science

1 answers

Aanya Jain 4 years, 11 months ago

2NaCl+2H2O--->2NaOH+H2+Cl2 This process is Chlor alkali process.

4Thank You

ANSWER

Doberenier trains

Posted by Laxmi S.P? 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Aanya Jain 4 years, 11 months ago

According to dobereiner traits when a three elements in a trait are arranged in order of their increasing atomic masses; the atomic mass of second element was roughly equal to the average of the atomic masses of the other two elements.

3Thank You

Vaishali 😊😊 4 years, 11 months ago

Dobereiner showed that when three elements in a triad were written in the order of their increasing atomic masses , the atomic mass of the middle element was roughly the average of the atomic masses of the other two elements .

2Thank You

ANSWER

Newton's law of octaves

Posted by Laxmi S.P? 4 years, 11 months ago

CBSE > Class 10 > Science

2 answers

Aanya Jain 4 years, 11 months ago

When John Newlands arranged atomic masses of elements in order of their increasing atomic masses he found that every eight element just posses the same property as that of the first element . He compared it to the octaves of music and thus have it the name the NEWLAND'S LAW OF OCTAVES

2Thank You

Vaishali 😊😊 4 years, 11 months ago

1) John newlands arranged the elements in order of their increasing atomic mass .2) It states that whenever the elements are arranged in increasing order of their atomic mass, the properties of the eighth element are a kind of repetition of the first.

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