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Isotopes of Carbon with mass number 12 , 13, and 14 the electonic configuration of Carbon is 2,4 it is same for all Carbon Isobars Argon( Ar ) and Calcium is different elements with same mass 40 Argon 2,8,8 Calcium 2,8,8,2 or be also write by Afbahaw 's Law

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Whai is Newton

Posted by Rocky Hsp 5 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Vikas Sharma 5 years, 8 months ago

Newton is a quantity in which force is measured.

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Shubham Meena 5 years, 8 months ago

A not an

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Shubham Meena 5 years, 8 months ago

Newton was an scientist because of which we are learning physics

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Meaning of reluctantly

Posted by Guffran Gyaraghar 5 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Anjali Singh 5 years, 8 months ago

Unwillingly

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Harneet Kaur 5 years, 8 months ago

Meaning of reluctantly means in “hesitant manner”.

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Two objects of masses 3 kg and 12 kg are on the distance of 12 m . The third object of mass 0.5 kg is placed on such a manner that the force acting on it is zero. Find the position of point.

Posted by Harneet Kaur 5 years, 8 months ago

CBSE > Class 09 > Science

0 answers

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The taxonomic hierarchy family comes between ?

Posted by Harneet Kaur 5 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Varun Jakhar 5 years, 8 months ago

order and genus

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Yogita Ingle 5 years, 8 months ago

In taxonomic hierarchy family comes between order and genus. Family has a group of related genera with still less number of similarities as compared to genus and species.

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Harneet Kaur 5 years, 8 months ago

Order and genus

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Define natural resources. Name two types of natural resources

Posted by Aishwarya Mahapatra 5 years, 8 months ago

CBSE > Class 09 > Science

4 answers

Anmol Babu 5 years, 8 months ago

Anything which fulfill our physical needs is called natural resource

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Keshav Verma 5 years, 8 months ago

Type of natural resources are exhaustible and inexhaustible

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Keshav Verma 5 years, 8 months ago

The resources that we get from nature those are natural resources

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Yogita Ingle 5 years, 8 months ago

Anything and everything that is available naturally on earth is a natural resource. We can further divide them into:

Biotic & Abiotic

Any life form that lives within nature is a Biotic Resource, like humans, animals, plants, etc. In contrast, an abiotic resource is that which is available in nature but has no life; like metals, rocks, and stones. Both biotic and abiotic resources can be renewable or non-renewable.

Renewable & Non-renewable

Renewable resources are almost all elements of nature which can renew themselves. For e.g. sunlight, wind, water, forests and likewise. While, non-renewable resources, are limited in their quantity. Like fossil fuels and minerals. Though these resources take millions of years to form, they would eventually get over within our lifetime if we use continuously.

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Difference between atomic mass and mass number

Posted by Aaquib Khan 5 years, 8 months ago

CBSE > Class 09 > Science

5 answers

Aaquib Khan 5 years, 8 months ago

Mr.Aditya Jakhar

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Aaquib Khan 5 years, 8 months ago

Maine atomic no. nhi pucha hai

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Keshav Verma 5 years, 8 months ago

Atomic number= the number of protons in one atom of a element is known as atomic number atomic mass= the total number of protons and neutrons present in one atom of the elements is known as atomic mass

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Varun Jakhar 5 years, 8 months ago

atomic mass = no. of protons + no. of neutrons atomic no=no.of proton = No.of Electron

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Swamy M 5 years, 8 months ago

The mass of an individual atom of a element is called atomic mass and mass number is called mass number

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Difference between moleculer mass and molar mass

Posted by Aaquib Khan 5 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Yogita Ingle 5 years, 8 months ago

MOLAR MASS	MOLECULAR MASS
Refers to mass of a mole of a substance	Refers to the mass of molecules
Also known as molecular weight	It determines the mass of single molecule
SI unit is g/mol to use in higher calculations	Measured in amu
It is defined as the mass of Avogadro number of atoms/molecules or compounds	No particular melting point
Measurement given to compounds, atoms or molecules	Determined only in molecules
Less accurate than molecular mass	Accurate to use in higher calculations
Example: Mass of 1 mole of oxygen is 15.9994 grams. Therefore the molar mass = 15.9994 g/mol	Example: Molecular mass of Ca(OH)2 = 74 atomic mass units

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Swamy M 5 years, 8 months ago

The mass of one molecule in a given compound is called moleculer mass and atomic mass in grams is called molar mass

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what is virus?

Posted by Suras Khan 5 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Yogita Ingle 5 years, 8 months ago

Viruses are non-cellular, microscopic infectious agents that can only replicate inside a host cell. From a biological perspective, viruses cannot be classified either as living organism nor non-living. This is due to the fact that they possess certain defining characteristic features of living organisms and non-living entities.

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Khushi ?✨ 5 years, 8 months ago

A virus is a biological agent that reproduce inside the cell of living hosts

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Who is the founder of cells

Posted by Ravindra Chaudhary 5 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Yash Pahade 5 years, 8 months ago

Robert hook in 1665

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Rohan Bamniya 5 years, 8 months ago

Robert Hooke

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Ravindra Chaudhary 5 years, 8 months ago

Drwhne

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Write the symtom , treatment,causing factor each five points

Posted by Mahesh Singh 5 years, 8 months ago

CBSE > Class 09 > Science

0 answers

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List any three reasons why you would think that you are sick and ought to see a doctor. If only one of these symptoms were present, would you still go to the doctor?why or why not?

Posted by Vikas Kumar 5 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Ravindra Chaudhary 5 years, 8 months ago

Write answer really good answering

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Yogita Ingle 5 years, 8 months ago

When there is a disease, its symptoms and signs appear. These symptoms may be headache, cough, loose-motions, wound with pus, etc. These symptoms indicate disease but do not tell what the disease is. So, it is advisable to go to the doctor to diagnose any signs of a disease on the basis of these symptoms. The doctor will get laboratory tests done, if required for the confirmation of a particular disease.

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Why is the valency of helium zero

Posted by Sree Laxmi 5 years, 8 months ago

CBSE > Class 09 > Science

5 answers

Varun Jakhar 5 years, 8 months ago

zero is the valeney of helium

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Piyush Kumar 5 years, 8 months ago

Because the k shell is almost full

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Yogita Ingle 5 years, 8 months ago

Atomic number of helium is 2. Its electronic configuration is K-2. The maximum number of electrons K shell can accommodate is 2. It means that its duplet is complete. Helium atom does not have to gain or lose any electron since, its outermost shell is complete with 2 electrons. Hence, the valency of helium atom is zero.

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Vinay Aggarwal 5 years, 8 months ago

Why is the valency of helium zero

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Vinay Aggarwal 5 years, 8 months ago

hlo

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How does sperm exter in uterus

Posted by Mst. Bipul Kr. Pandey 5 years, 8 months ago

CBSE > Class 09 > Science

0 answers

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Assertion and reason type questions

Posted by Tushar Malik 5 years, 8 months ago

CBSE > Class 09 > Science

0 answers

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Difference between transversal and longitudinal waves

Posted by Sandeep Mehto 5 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Gaurav Agarkar 5 years, 8 months ago

Wave in which the particle mov to and fro about the mean position in the direction of propagation of sound is called longitudinal wave and wave in which the particle vibrate up and down at right angle is called transversal wave

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Varun Jakhar 5 years, 8 months ago

Longitudinal Wave -> A wave in which the particles of the median vibrate back & forth in the same direction . In which the wave is moving . . These waves can be produced in all the 3 median that is solid , liquid, Gas Transverse wave-> A Wave in which the particles.of median vibrate up&down at right angle to the direction. These waves can be produced only in solids and liquids , but not in Gases

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Yogita Ingle 5 years, 8 months ago

Longitudinal	Transverse
The movement of the medium is of the same direction of the wave	The movement of the medium is perpendicular to the direction of wave
It acts in one dimension	It acts in two dimension
The wave cannot be polarized or aligned	The wave can be polarized or aligned
This wave can be produced in any medium such as gas, liquid or solid	This wave can be produced in solid and liquid’s surface
Earthquake P wave is an example	Earthquake S wave is an example
It is made of refractions and compressions	It is made of troughs and crests

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Write observation and conclusion of rather force alpha scatering conclusions

Posted by Jaspreet Singh 5 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Varun Jakhar 5 years, 8 months ago

observation -> Most of the particles passed undeflected few of the particles faced little deviation few particles get reflected back Drawbacks -> It could not exp. stability of an atom Initially it does not include neutron, Neutrons were incluled later on These limitations of Ruther ford's were exp. by Neil Bohr . He proposed Bohr's model of atom

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Difference b/w broilers and layers

Posted by Rahul Godara 5 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 5 years, 8 months ago

Broilers:

    Broilers are reared to obtain meat.
    Conditions should be helpful for the faster growth and low death rate of the broilers.
    The broilers provide us the sufficient protein and fat. Vitamin A and K are kept high.

Layers :

    An egg laying poultry is called layers.
    The space should be and adequate lighting helps them in laying period.
    The egg laying of hens depends on the intensity and light duration.

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Why (Na) is full filled in shells?

Posted by Sarnveer Singh Kamboj 5 years, 8 months ago

CBSE > Class 09 > Science