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Anything that occupies space and has mass and is felt by senses is called matter. According to indian ancient philosphor, matter is the form of five basic elements (the Panchtatva) – air , earth ,fire , sky and water. Characteristics of particles of matter Made of tiny particles. Vacant spaces exist between particles. Particles are in continuous motion. Particles are held together by forces of attraction. States of Matter Basis of Classification of Types Based upon particle arrangement Based upon energy of particles Based upon distance between particles Five states of matter Solid Liquid Gas Plasma Bose-Einstein condensate (I) SOLID Fixed mass, volume and shape Inter-particle distances are least. Incompressible. High density and do not diffuse Inter particle forces of attraction are strongest. Constituent particles are very closely packed. (II) LIQUID Not fixed shape but fixed volume and mass. Inter particle distances are larger than solid. Almost incompressible. Density is lower than solids and can diffuse. Inter particle forces of attraction are weaker than solids . Constituent particles are less closely packed. (III) GAS Neither fixed shape nor fixed volume. Inter particle distances are largest. Highly compressible. Density is least and diffuse. Inter particle forces of attraction are weakest. Constituent particles are free to move about. (IV) PLASMA (NON-EVALUATIVE) A plasma is an ionized gas. A plasma is a very good conductor of electricity and is affected by magnetic fields. Plasma, like gases have an indefinite shape and an indefinite volume. Ex. Ionized gas (v) BOSE-EINSTEIN CONDENSATE (non –evaluative) A BEC is a state of matter that can arise at very low temperatures. The scientists who worked with the Bose-Einstein condensate received a Nobel Prize for their work in 1995. The BEC is all about molecules that are really close to each other (even closer than atoms in a solid). Microscopic Explanation for Properties of Solids Solids have a definite shape and a definite volume because the particles are locked into place Solids do not flow easily because the particles cannot move/slide past one another Solids are not easily compressible because there is little free space between particles Microscopic Explanation for Properties of Liquids Liquids are not easily compressible and have a definite volume because there is little free space between particles. Liquids flow easily because the particles can move/slide past one another. Liquids flow easily because the particles can move/slide past one another. Microscopic Explanation for Properties of Gases Gases are easily compressible because there is a great deal of free space between particles Gases flow very easily because the particles randomly move past one another. Gases have an indefinite shape and an indefinite volume because the particles can move past one another (non –evaluative) Microscopic Explanation for Properties of Plasmas Plasmas have an indefinite shape and an indefinite volume because the particles can move past one another. Plasmas are easily compressible because there is a great deal of free space between particles. Plasmas are good conductors of electricity &are affected by magnetic fields because they are composed of lens. Microscopic Explanation for Properties of BEC Particles are less energetic than solids because Exist at very low temperature. Particles are literally indistinguishable because they are locked into same space . BEC shows super fluidity because Particles can flow without friction. Interchange in states of matter Water can exist in three states of matter – Solid, as ice, Liquid, as the familiar water, and Gas, as water vapour.

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H S S 4 years, 5 months ago

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विलियन क्या है उदाहरण सहित बताएं

Posted by Mukund Jha 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 4 years, 5 months ago

दो या दो से अधिक अवयवों के समांगी मिश्रण को विलयन कहा जाता है। जैसे नमक तथा जल का मिश्रण, ऑक्सीजन तथा नाइट्रोजन का मिश्रण, चीनी तथा जल का मिश्रण आदि।

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नियम क्या है उदाहरण सहित बताएं

Posted by Mukund Jha 4 years, 5 months ago

CBSE > Class 09 > Science

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Symbol of sulphide

Posted by Muhammad Suhaib 4 years, 5 months ago

CBSE > Class 09 > Science

5 answers

Pallavi Raj 4 years, 5 months ago

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Shoury Wardhan Singh Rathore 4 years, 5 months ago

S^-2

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Prachi Saxena 4 years, 5 months ago

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Ch.Muzaif Rana 4 years, 5 months ago

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Mohammed Ayaan 4 years, 5 months ago

S2-

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Meaning of compression

Posted by Virupakshappa B Shettar Shettar 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Subrajeet Swain 4 years, 5 months ago

Providing any kind of force on any thing.

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A diver is able to cut through water in a swimming pool. Which property of matter does this observation show

Posted by Adil Siddiqui 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Subrajeet Swain 4 years, 5 months ago

Intermolcular space

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Which method used to liquify the gases?

Posted by Virupakshappa B Shettar Shettar 4 years, 5 months ago

CBSE > Class 09 > Science

3 answers

Subodh Kumar 4 years, 5 months ago

By applying pressure and by increasing temperature

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Virupakshappa B Shettar Shettar 4 years, 5 months ago

Meaning of compression

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Subrajeet Swain 4 years, 5 months ago

Compression

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Calculate the number of aluminium ions present in 0.05g of aluminum oxide (Al½O⅓) (atomic mass of Al=27u,O=16u)

Posted by Ravita Karhana 4 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Subrajeet Swain 4 years, 5 months ago

Sorry i have not read it now

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Monik Kumawat 4 years, 5 months ago

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Why does a desert cooler cool better on a hot dry and?

Posted by Vrunda Sheta 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Trisha Kumari 4 years, 5 months ago

Evaporation depends on the amount of water vapour present in air (humidity). ... On a hot dry day, the amount of water vapour present in air is less. Thus, water present inside the desert cooler evaporates more, thereby cooling the surroundings more. That is why a desert cooler cools better on a hot dry day.

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A famer moves along the boundary of a square field of side 10m in 40s. What will be the magnitude of displacement of the farmer at the end of 2minutes 20 seconds from his initial position.

Posted by Vinay Joon 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

H S S 4 years, 5 months ago

Displacement is 10m

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Joseph jogs from one end A to the other end B of a straight 300m road in 2 min 30 sec and turns around and jogs 100m back to point c in another 1 min what are Joseph average speeds and velocity in jogging a) fromA to b and from ato c

Posted by Harshad Pathak 4 years, 5 months ago

CBSE > Class 09 > Science

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What is *** origin of the human body

Posted by Sahoo Dinesh Kumar 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Priyanshu Singh 4 years, 5 months ago

Panchtatva

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Why similar charges repel each other?

Posted by Krishna Bhardwaj 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Riya Singh 4 years, 5 months ago

Things that are negative charge and think that are positive charge pull on each other. This makes electrons and protons stick together to form atoms. Things that have the same charge push Each Other away( they repair each other)

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Name the largest cell of living world ??

Posted by Raj Nandni 4 years, 5 months ago

CBSE > Class 09 > Science

5 answers

Rakshanda Karolia 4 years, 5 months ago

The egg of Ostrich

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Jaswinder Kaur Jaswinder Kaur 4 years, 5 months ago

Ostrich egg

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Riya Singh 4 years, 5 months ago

Ostrich egg is the largest cell in living world

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Mounika G.V 4 years, 5 months ago

Ostrich egg

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Aditya.V Nimbalkar 4 years, 5 months ago

Egg of ostrich

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Write the functions of cell wall and plasma membrane

Posted by Raj Nandni 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Riya Singh 4 years, 5 months ago

The cell wall surround the plasma membrane of the cell and provides tensile structure and protection against mechanical and osmotic stress.It also allows cell to develop turgor pressure which is the presence of cell contents against the cell wall. Hope this will help you

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Dilpreet Singh

Posted by Dilpreet Singh Rider Second 4 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Muskan Mishra 4 years, 5 months ago

Hlo

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Riya Singh 4 years, 5 months ago

Hii

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What is prokaryotic cell and Eucaryotes

Posted by Kumar Puskar 4 years, 5 months ago

CBSE > Class 09 > Science

3 answers

Riddhi Chaturvedi 4 years, 5 months ago

Prokaryotic cells are the cells which lack nuclear membrane and hence have a poor nuclear region, whereas eukaryotic cells have well defined nuclear membrane and proper nuclear region.

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Rudra Dholakiya 4 years, 5 months ago

Prokaryotic cell are simple, small cell, whereas Eucaryotes cell are complex, large structure and the presence in trillions which can be single called or multicellular.

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Riya Singh 4 years, 5 months ago

Prokaryotic cell are simple, small cell, whereas Eucaryotes cell are complex, large structure and the presence in trillions which can be single called or multicellular.

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14.What is inflammation? What are the changes occur during inflammation?

Posted by Jyotsana Rout 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Trisha Kumari 4 years, 5 months ago

When inflammation happens, chemicals from your body's white blood cells enter your blood or tissues to protect your body from invaders. This raises the blood flow to the area of injury or infection. It can cause redness and warmth. Some of the chemicals cause fluid to leak into your tissues, resulting in swelling.

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A rectangular tube of uniform cross section has three liquids of densities 1 2  , and 3  . Each liquid column has length l equal to length of sides of the equilateral triangle. Find the length x of the liquid of density 1 in the horizontal limb of the tube, if the triangular tube is kept in the vertical plane.

Posted by Sanshray Gupta 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 4 years, 5 months ago

Q : A rectangular tube of uniform cross section has three liquids of densities ρ₁, ρ₂ and ρ₃. Each liquid column has length l equal to length of sides of the equilateral triangle. Find the length x of the liquid density ρ₁ in the horizontal limb of the tube, if the triangular tube is kept in the vertical plane.

Solution:
At junction force applied by left to coloumn = force applied by light of coloumn.
(1 − x) cos30^o p₁ gA + x cos30^o p₂ gA = (1 − x) cos30^o p₂ gA + x cos30^o p₃ gA
{tex}\Rightarrow{/tex} (1 − x)p₁ + xp₂ = (1 − x)p₂ + xp₃
{tex}\Rightarrow{/tex} p₁1 − p₁x + xp₂ = 1p₂ − xp₂ + p₃x
{tex}\Rightarrow{/tex} xp₂ − xp₁ + xp₂ − xp₃ = 1p₂ − 1p₁
{tex}\Rightarrow{/tex} x(2p₂ − p₁ − p₃) = 1(p₂ − p₁)
x = {tex}\frac {1(p_2 − p_1)}{2p_2 − p_1 − p_3}{/tex}

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Kya sabke exam khatam ho gye

Posted by Nitya Gupta 4 years, 5 months ago

CBSE > Class 09 > Science

5 answers

Muskan Mishra 4 years, 5 months ago

Yess

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Ashish Singh 4 years, 5 months ago

Nahin

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Diksha Laniya🐥 4 years, 5 months ago

Yes

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Kamal. Tiwary 4 years, 5 months ago

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Sanket ... 4 years, 5 months ago

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Congratulations guys ab ham class 10 me jayenge ☺️☺️

Posted by Nitya Gupta 4 years, 5 months ago

CBSE > Class 09 > Science

5 answers

Shoury Wardhan Singh Rathore 4 years, 5 months ago

hamare to exam aaj se chaloo hue h

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Krishna Bhardwaj 4 years, 5 months ago

U too dear??

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Riya Singh 4 years, 5 months ago

Mai bhi 9th May jaungi

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Muskan Mishra 4 years, 5 months ago

Yes u too sis ??

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Diksha Laniya🐥 4 years, 5 months ago

No ma to class 9th aiye hu

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What will be the effect of Cooling on rate of diffusion

Posted by Ishani Gaur 4 years, 5 months ago

CBSE > Class 09 > Science

1 answers

Sanket ... 4 years, 5 months ago

Temperature: Higher temperatures increase the energy and therefore the movement of the molecules, increasing the rate of diffusion. Lower temperatures decrease the energy of the molecules, thus decreasing the rate of diffusion. Solvent density: As the density of a solvent increases, the rate of diffusiondecreases.

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When a carpet is beaten with a stick,dust comes out of it.Explain.

Posted by Nikhil Upadhyay 4 years, 5 months ago

CBSE > Class 09 > Science

2 answers

Sanket ... 4 years, 5 months ago

Because of Newton first law of motion ( when we not beat a stick on a carpet its partical of dust in it is in rest and when we beat a stick on it they come in motion and dust comes out of it )

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Jatin Varshney 4 years, 5 months ago

Because of Newton first law of motion ( when we not beat a stick on a carpet its partical of dust in it is in rest and when we beat a stick on it they come in motion and dust comes out of it )

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Define kinetic energy derive the formula for kinetic energy

Posted by Drashti Jain 4 years, 5 months ago

CBSE > Class 09 > Science