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

Fertilizer is produce in Factories...But Manure is produce by human waste ...like kitchen wastage. And from soil.and cow dung. And Fertilizers harm the soils. But Manure do not.

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Dushyant Khola 2 years, 3 months ago

Hope so u understood it very clearly

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Dushyant Khola 2 years, 3 months ago

Fertilizer do not provide humus to the soil but manure provide humus to the soil. Manure is prepared in the fields but fertilizer is prepared in the factory. Fertilizer causes water pollution but manure does not cause water pollution

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Diffrence between True soloution,Supension Solution,Colodial Solution.

Posted by Devan Devan 2 years, 3 months ago

CBSE > Class 09 > Science

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Defination of rigidity

Posted by Hitesh Yogi 2 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Suraj Kumar 2 years, 3 months ago

Rigidity means that any substance which is very hard.

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Convert into 300kalvin to celcis

Posted by Sujal Chauhan 2 years, 3 months ago

CBSE > Class 09 > Science

3 answers

Cheshta Chhipa 2 years, 3 months ago

27°C

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Umesh Yadav 2 years, 3 months ago

27°C

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Aniket Mishra 2 years, 3 months ago

27 degree c

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Give reasons for the following observation: The smell of hot sizzling food reaches you several metres away, but to get the smell from cold food you have to go close.

Posted by Hitesh Yogi 2 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Akhand Singh 2 years, 3 months ago

This is because particle of fragrance move faster at higher temperature hence, particle of fragrance

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Dushyant Khola 2 years, 3 months ago

Because the particles of matter increase with the increase in temperature

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An aircraft has taken off from the airport and flies with uniform acceleration with a speed of 100 km/h in 2 minutes. Find the acceleration of the plane

Posted by Leyaavarshne J 2 years, 3 months ago

CBSE > Class 09 > Science

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The odometer of a bus reads 3250 km at the start of a trip and 5500 km at the end of the trip. If the trip took 18 h, calculate the average speed of the bus in km/h and m/s.

Posted by Leyaavarshne J 2 years, 3 months ago

CBSE > Class 09 > Science

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Difference between gas and vapours

Posted by Minal Mishra 2 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Dushyant Khola 2 years, 3 months ago

Vapour is not a state of matter but gas is a state of matter.

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How many gram of water is needed to make 8% mass by mass percentage of sodium carbonate solution if 4 g of sodium carbonate is a variable to make a solution?

Posted by Priya Raj 2 years, 4 months ago

CBSE > Class 09 > Science

2 answers

A To Z 2 years, 4 months ago

Liquids are not measured in grams

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A To Z 2 years, 4 months ago

If sodium carbonate dissociates completely molar concentration of ... is dissolved in enough water to make 250 mL of solution . ... In an expression of the equilibrium constant, units for ...

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Ice,Water and steam are three states of a substance and not different substance. Justify

Posted by Priyansu Sheoran 2 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Aishwarya Kumar 2 years, 4 months ago

Ice , water , steam are all the same substance that is water as changing of water to any of its other two forms solid or gas is a physical change. Only its physical state changes and there is no new substance formed . so they are all the same substance.

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Why our hand srink in rivers while bathing

Posted by Kundan Patel 2 years, 4 months ago

CBSE > Class 09 > Science

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What do you mean by 2 m/s2?

Posted by Raushan Kumar 2 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Chitresh Bisht 2 years, 4 months ago

acceleration formula is v-u/t and m/s^2 is the unit of acceleration

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Prince Kumar 2 years, 4 months ago

Acceleration Formula

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How to find distance and displacement between two points

Posted by Anmol . 2 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Garvit Bansal 2 years, 4 months ago

Distance = Speed × Time Displacement = Velocity × Time

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@Tanish Bainad 2 years, 4 months ago

By formula

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Vegetable release water adding dalt while cooking. justify the answer

Posted by Kasak Agarwal 2 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Epic Dangerz 2 years, 4 months ago

Pta nhi

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Class -IX. Assignment MATTER IN OUR SURROUNDINGS 1. Fill in the blanks. (1) Anything that occupies space and has mass is ...... (ii) Matter exists in three states.............,.............. and ....... (iii) The mass per unit volume of a substance is called ............ (iv) The temperature at which a solid melts to become a liquid is called its ............ (V) The temperature at which a liquid starts boiling at the atmospheric pressure is known as its.................... (vi) When ice melts, there is a................in volume. (vii) Increase in pressure,..........the boiling point of water. (viii) The phenomenon of change of a liquid into gas at any temperature below its boiling point is called ............. (ix) The intermixing of particles of two substances on their own is called .......... (x) The sun and the stars glow because of the presence of .... ... in them. 2. Mark the statements true or false (i) Evaporation causes cooling. (ii) Boiling is a surface phenomenon. (iii) Evaporation is a bulk phenomenon. (iv) The unit of pressure is Pascal (Pa). (V) The melting point of ice is 373 K. (vi) Liquids have a fixed volume but they have no fixed shape. (vii) Gases do not flow. (viii) The spaces between the molecules are the minimum in solids. (ix) The forces of attraction between the molecules are negligible in solids. (x) The movement of molecules is the minimum in solids.

Posted by Naveen Dhull 2 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Samriddhi Yadav 2 years, 4 months ago

1 Matter 2 Solid,liquid and gas 3 Density 4 Melting point 5 Boiling point 6 reduction 7 increase 8 evaporation 9 diffusion 10 plasma

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Naveen Dhull 2 years, 4 months ago

Please give the answer

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Explain the factors affecting the state of matter

Posted by Sameer Jha 2 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Kanu Choudhary 2 years, 4 months ago

1) Intermolecular space 2) Intermolecular force

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Separation of food

Posted by Neha Pal 2 years, 4 months ago

CBSE > Class 09 > Science

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Formula of a²-b²

Posted by Saumya Mudotiya 2 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Smriti Gupta 2 years, 4 months ago

(a+b)(a-b)

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Anurag Sonkar 2 years, 4 months ago

(a+b)(a-b)

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Sameer Jha 2 years, 4 months ago

(a+b)(a-b)

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Harshita Sharma 2 years, 4 months ago

(a+b) (a-b)

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Rohit Kumar 2 years, 4 months ago

(a²+b²)(a²-b²)=a²-b²

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Why solids can be scratched easily ?

Posted by Savya Khandelwal 2 years, 4 months ago

CBSE > Class 09 > Science

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Rusting of steel or iron needs found in air

Posted by Surya B 2 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sai Sri Poojitha Cheedella 2 years, 4 months ago

Yes

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Sexology

Posted by Gautam Jain 2 years, 4 months ago

CBSE > Class 09 > Science

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A boy leaves his house at 9.30 a.m. for his school. The school is 2 km away and classes start at 10.00 a.m. if he walks at a speed of 2 km/h for the first kilometre, at what speed should he walk the seconds kilometre to reach just in time?

Posted by Vansh Gupta 2 years, 4 months ago

CBSE > Class 09 > Science

0 answers

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Report on 4th and 5th state of matter

Posted by Ritika Suthar 2 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Om Sen 2 years, 4 months ago

F Dec holidays

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Sai Sri Poojitha Cheedella 2 years, 4 months ago

4th state of matter is plasma 5 th state of matter is bose einstein condensate

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What are the characteristic of particle of matter

Posted by Tejwrat Kumar 2 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Saumya Mudotiya 2 years, 4 months ago

1. Particles of matter have space between them 2.Particles of matter attract each other 3. Particles of matter continuously moving 4.Particles of matter are very small 5.Particles of matter are always in random motion

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Gurleen Chakkal 2 years, 4 months ago

Particles of matter attract each other. 2. Particles of matter continously moving. 3. Particles of matter have space between them

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Vansh Gupta 2 years, 4 months ago

The characteristic of particle of matter is three types 1-solid 2-liquid 3-gas

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Ved Singh 2 years, 4 months ago

1. Particles of matter attract each other. 2. Particles of matter continously moving. 3. Particles of matter have space between them

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Garvit Bansal 2 years, 4 months ago

1. All matter is made up of tiny discrerte particles. 2. Particles of matter are very small which can exist independently. 3. They are continously moving. 4. They attract each other. 5. They have spaces between them.

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Can you name the two organells we have studied that contain their own genetic material

Posted by Nishu Sharma 2 years, 4 months ago

CBSE > Class 09 > Science