CBSE > Class 09 > Science | CBSE Board | Homework Help

A ball moving with uniform velocity and another ball moving inthe same direction of the ball 1 andhits on the ball1 and the ball 1 with accelerate in a a way that the constant velocity breaks.

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Shivam Singh 3 years, 1 month ago

Riding your bicycle

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ANSWER

A substance melts at 5°C and boils at 150°C. What will be its physical state at room temperature?

Posted by Vanmathy Manavalan 3 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Shivam Singh 3 years, 1 month ago

Liquid is the answer

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Amita Kumari 3 years, 1 month ago

Nothing

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ANSWER

How do substances like co2and water move in and out of the cell

Posted by Abhijeet Patra 3 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Pra Jit 3 years, 1 month ago

Through the SEMIPREMIABLE MEMBRANE by the process of diffusion

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Muhammadnasir Saudagar 3 years, 1 month ago

By process of Diffusion

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Shivam Singh 3 years, 1 month ago

The substances like CO2 and water move in and out of a cell by diffusion from the region of high concentration to low concentration.

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Hi Hello 3 years, 1 month ago

By the process of diffusion

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Arshia .. 3 years, 1 month ago

1.Gases like CO2 moves in and out of the cell by diffusion in which it moves from the region of its higher concentration to the region of its lower concentration. 2. Water moves in and out of the cell by the process of osmosis.Osmosis is the movement of water from the region of its higher concentration to the region of its lower concentration when separated by a selectively permeable membrane.

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Hmare shrir me kitni hddiya he

Posted by Priyanka . 3 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Bhavna Sharma 3 years, 1 month ago

206

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? Akanksha Dhaka ? 3 years, 1 month ago

206 bones

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Shivam Singh 3 years, 1 month ago

There are 29 bones in the human head. They consist of 8 cranial bones, 14 facial bones, the hyoid bone, and 6 auditory (ear) bones. The 8 cranial bones are the frontal, 2 parietal, occipital, 2 temporal, sphenoid, and ethmoid bones.

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Sourabh Thakur 3 years, 1 month ago

206

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ANSWER

What is golgi bodies ?

Posted by Yashika Swami 3 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Sia ? 3 years, 1 month ago

The Golgi apparatus, also known as the Golgi complex, Golgi body, or simply the Golgi, is an organelle found in most eukaryotic cells. Part of the endomembrane system in the cytoplasm, it packages proteins into membrane-bound vesicles inside the cell before the vesicles are sent to their destination.

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Abhaynoor Singh Pannu 3 years, 1 month ago

Golgi bodies also called the part of a cell organelle.

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Shivam Singh 3 years, 1 month ago

A complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport.

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ANSWER

What is sericulture

Posted by Raj Rani 3 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Sia ? 3 years, 1 month ago

Sericulture, or silk farming, is the cultivation of silkworms to produce silk. Although there are several commercial species of silkworms, Bombyx mori is the most widely used and intensively studied silkworm. Silk was believed to have first been produced in China as early as the Neolithic Period.

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? Akanksha Dhaka ? 3 years, 1 month ago

The process of cultivating silkworms and extracting silk from them

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Shivam Singh 3 years, 1 month ago

the production of silk and the rearing of silkworms for this purpose

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Kuldeep Pandey 3 years, 1 month ago

Good

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Divyanshi Jadon 3 years, 1 month ago

But ye questions to class 7th ka hai

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ANSWER

Hey anyone there??

Posted by Gauri Nehe 3 years, 1 month ago

CBSE > Class 09 > Science

4 answers

? Akanksha Dhaka ? 3 years, 1 month ago

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Gauri Nehe 3 years, 1 month ago

Hi ishu

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Shivam Singh 3 years, 1 month ago

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Ishu Choudhary 3 years, 1 month ago

Yes

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ANSWER

diffrents between prokoryotic and eukroyotic

Posted by Mahi Bhatiya 3 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Shivam Singh 3 years, 1 month ago

The primary distinction between these two types of organisms is that eukaryotic cells have a membrane-bound nucleus and prokaryotic cells do not. The nucleus is where eukaryotes store their genetic information. ... Prokaryotes, on the other hand, have no membrane-bound organelles

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Pra Jit 3 years, 1 month ago

Prokaryotic cells- they are not membrane bound, they don't have a well defined nucleus, EUKARIOTIC CELLS are membrane bound, they have a well defined nucleus.

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ANSWER

What is plastide

Posted by Kunal Jangra 3 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Shivam Singh 3 years, 1 month ago

any of a class of small organelles in the cytoplasm of plant cells, containing pigment or food.

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Pra Jit 3 years, 1 month ago

It is one of the membrane bound cell organell, and they are present in plants.

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ANSWER

Which among the following is/are flour+water, sand+water, salt+water, turmirc+water

Posted by Owais Malik 3 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Chaithanya Kumar 8Th Class 3 years, 1 month ago

Flour + water gives colloidal solution Sand + water gives suspension Salt + water gives true solution Turmeric + water gives suspension

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Neil :) 3 years, 1 month ago

What???

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ANSWER

123

Posted by Neil :) 3 years, 1 month ago

CBSE > Class 09 > Science

4 answers

? Akanksha Dhaka ? 3 years, 1 month ago

Incomplete ❓ question

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Tanya Maurya 3 years, 1 month ago

123

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Neil :) 3 years, 1 month ago

1+2+3

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Sia ? 3 years, 1 month ago

Please ask question with complete information.

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ANSWER

What is speed and velocity give an example

Posted by Debarchana Mandal 3 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Sia ? 3 years, 1 month ago

Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. For example, 50 km/hr (31 mph) describes the speed at which a car is traveling along a road, while 50 km/hr west describes the velocity at which it is traveling.

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Shrishti Rathore 3 years, 1 month ago

Speed - The distance covered by a body per unit time is called speed . Speed is a scalar quantity. It is always positive. The S.I. unit of speed is metre(m). Velocity - The displacement travelled by a body per unit time is called velocity. Velocity is a vector quantity. It may be positive, negative or zero. The S.I. unit of velocity is metre (m).

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Pra Jit 3 years, 1 month ago

SPEED is distance/time and VELOCITY is displacement/time

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ANSWER

Degine compound.

Posted by Shakil Mew 3 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Shrishti Rathore 3 years, 1 month ago

Compound are the pure substances which are made of same kind of elements combined together in a fixed ratio or proportion in terms of mass, volume and weight. Example - CO2(carbon dioxide),H2O ( water),etc.

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Pra Jit 3 years, 1 month ago

Two or more elements combained together is called a compound (Eg: H2O, CO2)

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ANSWER

Deffrence between mixture and Compound

Posted by Shubham Kumar 3 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Shrishti Rathore 3 years, 1 month ago

Compound are the pure substances which are made up of same kind of elements combined together in a fixed ratio or proportion in terms of mass,volume,weight . Mixtures are the substances which are obtained from mixing two or more substances.

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Pra Jit 3 years, 1 month ago

Compound consists of two or more elements (elements are pure substances) and Mixture consists of many substances.

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ANSWER

Why mixture is differ from compound??

Posted by Mankirat Singh 3 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Pra Jit 3 years, 1 month ago

Compound is made up of two or more elements (eg for compound is H2O)and elements were pure substance and mixture is made up of many components (Eg for mixture is air)

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ANSWER

A boy is running along a circular path. Whose radius is 56 metre. If he completes one round in 40 second. Then find his displacement and distance after 140 second.

Posted by Mankirat Singh 3 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Chaithanya Kumar 8Th Class 3 years, 1 month ago

Distance = 3×Circumference + Circumference/2 =3 ×352 + 352/2 =1056 + 176 =1232m.

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Chaithanya Kumar 8Th Class 3 years, 1 month ago

Displacement=diameter of circular path =56×2 =112m

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ANSWER

Plz help me to make notes of ch 8

Posted by Rakshita Chawla 3 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Sia ? 3 years, 1 month ago

<a href="https://mycbseguide.com/dashboard/content/567">https://mycbseguide.com/dashboard/content/567</a>

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Sia ? 3 years, 1 month ago

Please ask question with complete information.

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ANSWER

A body moves 200 in a straight line and returns back in the same part 85 find the distance and displacement

Posted by Jagrati Bhadauria 3 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Pra Jit 3 years, 1 month ago

Distance =200+85=285 , and displacement=200-85=115, Note: Distance is the value that how far an object is moved so we have to add all the values given that the object moved and DISPLACEMENT is the shortest distance and it is from the starting point to the end point(a strait line).

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ᴘʀᴀɴᴊᴀʟ ᴍɪsʜʀᴀ 3 years, 1 month ago

115 Dɪsᴘʟᴀᴄᴇᴍᴇɴᴛ

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ANSWER

a bus decreases its speed from 80 kilometre per hour to 60 km per hour in 5 second find the acceleration of the bus ?

Posted by Poonam Chouhan 3 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Poonam Chouhan 3 years, 1 month ago

Initial speed u=80 km/h=80×185=22.22 m/s Final speed v=60 km/h=60×185=16.67 m/s Using v=u+at Or 16.67=22.22+a×5 ⟹ a=−1.1 m/s2

3Thank You

ANSWER

What is particle?

Posted by Mankirat Singh 3 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Pra Jit 3 years, 1 month ago

An atom?

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Poonam Chouhan 3 years, 1 month ago

a relatively small or the smallest discrete portion or amount of something

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Samrat Jaiswal 3 years, 1 month ago

Particle is a very small substance

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ANSWER

what happens when a mixture of iron and sulphur is heated. write the equation involved. in this reaction physical or chemical change.

Posted by Ananya Chauhan 3 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Manju Tripathi 3 years, 1 month ago

Chemical change

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ANSWER

Is cooking a chemical reaction? Which reactions are involved?

Posted by Anushka D 2 years, 10 months ago

CBSE > Class 09 > Science

4 answers

Mankirat Singh 3 years, 1 month ago

Yes, cooking is a chemical reaction because After cooking, the raw materials or vegetables are not became recovee again.

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Dhaval Sirvi 3 years, 1 month ago

Bosadk

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Ibadur Rahman Laskar 3 years, 1 month ago

Yes it is a chemical reaction

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Anushka D 3 years, 1 month ago

I mean which type of chemical reactions are involved

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ANSWER

Make project on "To study the time required in boiling 100ml of duffernent liquids"

Posted by Vani Gupta 3 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

What will happen when you apply centrifugal force? Give some applications also.

Posted by Bhupendra Singh 3 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Chaithanya Kumar 8Th Class 3 years, 1 month ago

Centrifuge:It is a device which is used to seperate the tiny components in a colloidal solution with the help of "centrifugal force"

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ANSWER

Define crystallisation

Posted by Vinit Swami 3 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Pra Jit 3 years, 1 month ago

Crystallization is a process in which the sender particles are forced to settle down and the lighter particles stay in the top when SPUN(SPINNED) RAPIDLY.

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Dhaval Sirvi 3 years, 1 month ago

Madrochad

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Jashan Duhan 3 years, 1 month ago

crystallization

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Sanket ... 3 years, 1 month ago

Crystallization or crystallisation is the process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. Some of the ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas.

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Sanket ... 3 years, 1 month ago

Hello

1Thank You

ANSWER

How to make 3d model of states of matter

Posted by Dipu Mangela 3 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Pra Jit 3 years, 1 month ago

For SOLID we can use anything like the cardboard, steel, hard, soft substances etc and for Liquids we can use simple water without any effects , and for GAS we can use a balloon filled with water or even the surrounded air.

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ANSWER

Explain the process of osmosis through an example

Posted by Shivendra Pratap Singh 3 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Pra Jit 3 years, 1 month ago

Osmosis is a process in which the water molecules move from a region of higher water concentration to a region of lower water concentration through a SEMIPREMIABLE MEMBRANE in and out of the cells to make the outer and inner water concentration EQUAL.

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ANSWER

What lignin in the sclarenchyma tissue

Posted by Soumyashree Pasodi 3 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Sia ? 3 years, 1 month ago

Sclerenchyma tissue, when mature, is composed of dead cells that have heavily thickened walls containing lignin and a high cellulose content (60%–80%), and serves the function of providing structural support in plants. Sclerenchyma cells possess two types of cell walls: primary and secondary walls.

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Pra Jit 3 years, 1 month ago

Lignin is a substance present in the cell wall and yes by mentioning cell wall is is present in plants this lignin contains of dead cells and gives strength to the plant because they have thickend walls with no intercellular spaces.

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ANSWER

Why do we separate the componts of a mixture

Posted by Anish Krishna 3 years, 1 month ago

CBSE > Class 09 > Science