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Electrons orbit the nucleus of an atom of different ranges called shells.shells has a different energy level increasing the further it nucleus .The closest shell has a value of n=1

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How atoms are made up of

Posted by Shivam Kumar 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Sweta Gupta 7 years, 1 month ago

ATOMS are made up of three sub-atomic particles PROTON, NEUTRON, ELECTRON

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Yatharth Malha 7 years, 1 month ago

Atoms are made up of neutron,electron and proton

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Does sun has seasons ? If yes the why? Or why not?

Posted by Siddharth Bagora 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Rubi Yadav 7 years, 1 month ago

And one thing sun BRING season so it cant have a season

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Rubi Yadav 7 years, 1 month ago

No. Because sun is a giant fire ball so it impossible for sun to have a season

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What is lichins?

Posted by Raj Rathore 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Manani Chaudhary 7 years, 1 month ago

It is relationship between two organism in which both of them are benefited example fungi and blue green algae fungi get its food from blue green algae and in return blue green algae get shelter

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Process of hearing sound

Posted by Amar Rao 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Garima Chauhan 7 years, 1 month ago

Sound funnels into the ear canal and causes the eardrum to move. Sound vibrations move through the ossicles to the cochlea

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What is the weight of 1 carbon atom in grams

Posted by Mridul Baranwal 7 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Balbir Singh 7 years, 1 month ago

Mass of a carbon atom is 1.9924×10^-23 it is not 12 it is 12u which is in atomic mass unit and it is 1.9924×10^-23÷12=1.66×10^-24g since this cannot be measured it is resembled as 12u and it is not practical.

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Sneha Mitra 7 years, 1 month ago

12grams

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Anubhav Bansal 7 years, 1 month ago

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Define relative atomic mass of zno3

Posted by Aadya Arora 7 years, 1 month ago

CBSE > Class 09 > Science

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What is mitrochondiria

Posted by Sandeep Gope 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Yogita Ingle 7 years, 1 month ago

Mitochondria are round "tube-like" organelles that provide energy to a cell in the form of ATP (Adenosine Triphosphate) for performing different chemical activities for the sustainance of life.
The mitochondria is also called powerhouse of the cell.
It is surrounded by two membranes.
The outer membrane is porous wherea the inner membrane has deep folds that provides a large surface to perform the chemical reactions required for the generation of ATP.
The inner membrane is compartmentalized into various cristae.
The ground substance or space enclosed by inner membrane is called matrix.
Mitochondria have their own DNA and ribosomes and are hence capable to produce some of their required proteins all by themselves.

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Kuldeep Sharma 7 years, 1 month ago

Power house of cell

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What is gymnosperms

Posted by Debu Biswas 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 7 years, 1 month ago

The term gymnosperm is derived from two different words. They are

gymno– means naked and
sperma– means seed.

The plants belonging to this group have naked seeds.
The plants of this group are generally perennial, evergreen and woody.
Examples of plants belonging to this group are pines and cycas.

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10 metalloids

Posted by Akarsh Gangwar 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Ashish Suraj 7 years, 1 month ago

Arsenic ,Boron ,sillicon ,Germenium ,Antimony ,Tellurium ,polonium ,carbon,Almunium ,Astetine are 10 mettalloids . They having some property of metal and non -metal.

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What is the name of the gel (chemical) used for ultrasound

Posted by Vedanshi Singh 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Sneha Mitra 7 years, 1 month ago

Ultra gel

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Ajay Chauhan 7 years, 1 month ago

What is call

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There is no oxygen in space so why sun is burning because burning needs. Oxygen and there is no oxygen in space

Posted by Prakhar Verma 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sahil Sheikh 7 years, 1 month ago

the Sun can "burn" hydrogen to helium without the need for oxygen. It should be noted that in the presence of carbon, nitrogen and oxygen, stars heavier than the Sun may burn hydrogen to helium by using the C, N and O as catalysts. HOPE IT HELPS U

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Temp of sun

Posted by Prakhar Verma 7 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Siddharth Bagora 7 years, 1 month ago

TEMPRATURE OF CORE=10000°C

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Siddharth Bagora 7 years, 1 month ago

TEMPRATURE OF OUTER SURFACE =5000°C

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Ashish Suraj 7 years, 1 month ago

Temperature of sun is 5,778 kelvin .

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Sai Pratheek 7 years, 1 month ago

5,778K

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Sahil Sheikh 7 years, 1 month ago

5600 celsius

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define 2 law of newton ? explain

Posted by Faiz Khan 7 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Ashish Suraj 7 years, 1 month ago

There are thrèe laws of newton about motion such as 1 Inertia :inertia is a property of an object if a body being in rest position then it will want to remain in rest position its position does not change by any external force applied . And if abody being is the motion then the body want to be in the motion its position doesn't change by any external force applied. This is the first law . 2 The rate of change momentum of an object by applied force them the dosplacement into force direction . And 3 Action and reaction always equal in opposite direction. (Hope its helful for you )

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Saumya Agrawal 7 years, 1 month ago

F=ma

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Mukul Parwani 7 years, 1 month ago

An action have an equal reaction

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Harshit Pandey 7 years, 1 month ago

It state that rate of change of momentum is directly proportional to the applied unbalanced force

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What do u mean by latent heat?Define its types

Posted by Rayyan Imtiyaz 7 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Ashish Suraj 7 years, 1 month ago

The heat is required to change 1 kg solid into liquid state is called is latent heat of fusion. And The heat is required to change 1 lt water into its gaseous state then it is called the latent heat of vaporisation. Hope its helpful for you

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Saumya Agrawal 7 years, 1 month ago

Latent heat or hidden heat is the energy required to change the state

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Ayush Singh 7 years, 1 month ago

It is the hidden heat being used to chamge the state of substance.

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Mukul Parwani 7 years, 1 month ago

Means liquid to gas through heat

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Application of ultrasonic waves?

Posted by Jay Joshi 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Saumya Agrawal 7 years, 1 month ago

1.SONAR 2.Used for Cleaning-the thing is put in a cleaning solution and ultrasonic waves are passed through it.Then,the obj. Shake vigorously and the dust particles come out 3.ultrasonography 4.Bats use to catch it's prey 5.To check a crack 6.To observe several body parts Plz don't see spelling and grammatical mistakes

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Mukul Parwani 7 years, 1 month ago

Use to identify brain tumer Use to identify stone in our body

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A rubber band can change its shape on stretching. Will you classifi it as solid or not?

Posted by Taran Jeet 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Ashish Suraj 7 years, 1 month ago

Yes i classify this is solid . When we aaplied the force then the rubber stretches . After removing the force the rubber can come in their orignal shape. This is the change of state on applying pressure.

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Ayush Singh 7 years, 1 month ago

Yes we will classify it as solid because agter removing the forve from it ,it regains its origianal shape

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Father of biolagy

Posted by .Yogitha . Dhanaji 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Ashish Suraj 7 years, 1 month ago

The father of biology is Aristole also called Arstu.

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Aryan Sikhwal 7 years, 1 month ago

Aristotle

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You are slown two sides of plant tissue parenchyma and selernchyma how can you identify the sclerenchyma and parenchyma

Posted by Shivanshu Pratap Singh 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Mukul Parwani 7 years, 1 month ago

Parenchyma tissue give softness from this we identify parenchyma tissue AND Sclerenchyma tissue give hardness from this we identify sclerenchyma tissue Ex. Parenchyma. Fruits Ex. Sclerenchyma. Husk of coconut

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Draw back of rutherfords atom model2

Posted by Baiju George 7 years, 1 month ago

CBSE > Class 09 > Science