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

Ask questions which are clear, concise and easy to understand.

Ask Question

X=9+4root 5 find x+1/x

Posted by Krishna Gupta 2 years, 7 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Give difference between infectious diseases and non infectious diseases

Posted by Virat Singh 2 years, 7 months ago

CBSE > Class 09 > Science

1 answers

Aashima Saini 2 years, 7 months ago

Infectious diseases are the diseases which spread from a infected person to a healthy person by the microorganisms . non infectious disease that the diseases which do not spread from a healthy person

1Thank You

ANSWER

What are the causes of disease?

Posted by Dhananjay Yadav 2 years, 7 months ago

CBSE > Class 09 > Science

1 answers

Rashmi Chandola 2 years, 7 months ago

Bacteria.

0Thank You

ANSWER

Which of the following are matter ? Chair , air , love,smell,hate,almonds, thought,cold,lemon,water,smell of perfume

Posted by Gurleen Kaur 2 years, 7 months ago

CBSE > Class 09 > Science

3 answers

Shine_ Sun._._ 2 years, 7 months ago

Chair , air , almonds , lemon.

0Thank You

Gauri Bhole 2 years, 7 months ago

Almonds,lemon,water

0Thank You

Nikita Raj Madheshiya 2 years, 7 months ago

Answer

3Thank You

ANSWER

When a car driver travelling at a speed of 10m/s applies the brake and brings the car to rest in 20 s , the retardation will be ? Please tell me the solution with simplification

Posted by Angel Sharma 2 years, 7 months ago

CBSE > Class 09 > Science

1 answers

Navya Agarwal 2 years, 7 months ago

-0. 5m/sec

0Thank You

ANSWER

Common the following properties Filling a gas container?

Posted by Yashpriya Joshi 2 years, 7 months ago

CBSE > Class 09 > Science

1 answers

Aryan Chauhan 2 years, 6 months ago

It can be compressed easily Gas does not have fixed the shape Molecule of the gas will collide each other and it will fill the gas container

0Thank You

ANSWER

A train running on 200 km track covers first 100 km with 100 km per hour at what speed should the train travel remaining distance so as to obtain average speed of 50 km per hour

Posted by Nitya Agrawal 2 years, 7 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Is the smell of perfume a matter?

Posted by Yashpriya Joshi 2 years, 7 months ago

CBSE > Class 09 > Science

3 answers

Varshata Kumbar 2 years, 7 months ago

Yes

0Thank You

Angel Sharma 2 years, 7 months ago

1Thank You

Pranjal Gupta 2 years, 7 months ago

Yes

1Thank You

ANSWER

Water cooler are less efecting in raining season

Posted by Mayank Chauhan 2 years, 7 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

P4H10+H2O=H3PO4 BALANCE THE equation

Posted by Vibhum Soni 2 years, 7 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Which kind of energy is possessed when kite is flying

Posted by Reena Bharti 2 years, 7 months ago

CBSE > Class 09 > Science

2 answers

Saurabh Yadav 2 years, 7 months ago

Kinetic energy

2Thank You

Aditya Jain 2 years, 7 months ago

Yes

5Thank You

ANSWER

How diffusion and osmosis important for plants?

Posted by Ritika Singh 2 years, 7 months ago

CBSE > Class 09 > Science

4 answers

Aditya Singh Rathore 2 years, 7 months ago

Plants use this to absorb water from the soil to the roots. Osmosis is important to plants because it allows for water uptake, photosynthesis and general stability. Osmosis ensures that all cells and structures within a plant have correct water pressure and volume.

0Thank You

Rashmi Chandola 2 years, 7 months ago

Osmosis = movement of water Molecules from in and out of the cell membrane.

0Thank You

Rashmi Chandola 2 years, 7 months ago

Diffusion = the movement of molecules from higher concentration level to lower concentration level.

0Thank You

Angel Sharma 2 years, 7 months ago

Because diffusion is the process of movement of particles ( solids and gases) from higher concentration to lower concentration And Osmosis is the process of movement of water from higher concentration to lower concentration Thus they are so important for the survival of plant cells

0Thank You

ANSWER

hindi meaning of revolution

Posted by Suhani Kumari 2 years, 7 months ago

CBSE > Class 09 > Science

2 answers

Vaishnabi Rajak 2 years, 7 months ago

Kraanti

1Thank You

Saurabh Yadav 2 years, 7 months ago

क्रांति

2Thank You

ANSWER

define cell number

Posted by Aira Mirza 2 years, 7 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Who discovered cells,and how

Posted by Taniya Thakur 2 years, 7 months ago

CBSE > Class 09 > Science

5 answers

Princy Asudani 2 years, 7 months ago

Robert hooke discovers cells while he was examining a thin slice of cork.

2Thank You

Rifat Jahan 2 years, 7 months ago

Robert hook in 1665 with the help of tree bark

1Thank You

Rifat Jahan 2 years, 7 months ago

Robert hook

1Thank You

Kritika Sharma 2 years, 7 months ago

Gaisfsfr

2Thank You

Mohit Rohilla 2 years, 7 months ago

Robert hook

3Thank You

ANSWER

Give explanation of nitrogen cycle with chart

Posted by Palak Makwana 2 years, 7 months ago

CBSE > Class 09 > Science

1 answers

Aditya Singh Rathore 2 years, 7 months ago

Nitrogen Cycle is a biogeochemical process through which nitrogen is converted into many forms, consecutively passing from the atmosphere to the soil to organism and back into the atmosphere. It involves several processes such as nitrogen fixation, nitrification, denitrification, decay and putrefaction.

0Thank You

ANSWER

Give the primary information about structure of an atom ?

Posted by Krishnapal Rathore 2 years, 7 months ago

CBSE > Class 09 > Science

1 answers

Reena Bharti 2 years, 7 months ago

An atom have 3 subatomic particles which are Electrons, Proton & Neutron

0Thank You

ANSWER

What is power? what is the si unit of it

Posted by Prasad Naika 2 years, 7 months ago

CBSE > Class 09 > Science

2 answers

K_Hushii 🍁 2 years, 7 months ago

Joule.......

1Thank You

Aarif Raza 2 years, 7 months ago

Power refers to the rate of energy consumption. Si unit is joule

1Thank You

ANSWER

15 definition

Posted by Yash Yadav 2 years, 7 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Why small particles attract each other?

Posted by Vandana Kumari 2 years, 7 months ago

CBSE > Class 09 > Science

1 answers

Anita Raizada 2 years, 7 months ago

Due to opposite charges on them

0Thank You

ANSWER

Which of the following are matter? Chair,air, love,smell,hate, almonds,thought,cold,lemon,water,smell of perfume.

Posted by Sahil Khan 2 years, 7 months ago

CBSE > Class 09 > Science

4 answers

Rohit Kumar 2 years, 6 months ago

Chair, air,almonds,lemon, water,smell of perfume

0Thank You

Rashmi Chandola 2 years, 7 months ago

Chair, almonds, air, lemon, water, smell of perfume.

0Thank You

Sharshti Shukla 2 years, 7 months ago

chair

0Thank You

Vandana Kumari 2 years, 7 months ago

Air Almonds Lemon Water Smell of perfume

1Thank You

ANSWER

Matter is made up of small _________

Posted by Aryan Shinde 2 years, 7 months ago

CBSE > Class 09 > Science

5 answers

Sharshti Shukla 2 years, 7 months ago

small particles

0Thank You

Parineeti Singh 2 years, 7 months ago

particals called atom!

0Thank You

Avni Birla 2 years, 7 months ago

Atoms

0Thank You

Abhishek Singh 2 years, 7 months ago

Small particles

0Thank You

Vandana Kumari 2 years, 7 months ago

Tiny particles

0Thank You

ANSWER

What is mettea

Posted by Monika Yadav 2 years, 7 months ago

CBSE > Class 09 > Science

1 answers

Vandana Kumari 2 years, 7 months ago

Anything which occupy space and have some mass is called matter

0Thank You

ANSWER

structure of atom all answer key

Posted by Kishan Yadav 2 years, 7 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

If your weight is 66N on the earth surface.What will be your weight on the moon

Posted by Aparna Tiwari 2 years, 7 months ago

CBSE > Class 09 > Science

4 answers

Kritika Sharma 2 years, 7 months ago

Yogyata

0Thank You

Mohit Rohilla 2 years, 7 months ago

11 kg

0Thank You

Katyani Kumari 2 years, 7 months ago

0Thank You

Piyushgamer Sharma 2 years, 7 months ago

0Thank You

ANSWER

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

Posted by Sour Abh 2 years, 7 months ago

CBSE > Class 09 > Science

3 answers

Rohit Kumar 2 years, 6 months ago

The particles of hot sizzling food possess large kinetic energy so particles diffuse rapidly in air and reaches several meters away but particles of cold food posses less kinetic energy so particles cannot move rapidly in air

0Thank You

Angel Sharma 2 years, 7 months ago

Because as the temperature of a substance increases the particles of matter starts moving freely

0Thank You

Jahanavi Pandey 2 years, 7 months ago

Reasons behind it- Hot sizzling food have high temperature, so it have high speed and cold food have cold temperature therefore it have low speed

0Thank You

ANSWER

What is universal law of gravitation What is SI unit of m What is positive force

Posted by Aarif Raza 2 years, 7 months ago

CBSE > Class 09 > Science

1 answers

Adrija Saha 2 years, 7 months ago

The universal law of gravitation states that- Every particle attracts every other particle in the universe with a force that is directly proportional to the product of the masses and inversely proportional to the square of the distance between them. SI unit of m is m/sec. POSITIVE WORK: The work done on an object is said to be positive work when force and displacement are in same direction. Example: When an object moves on horizontal surface, force and displacement acts in same direction. So, work done is positive.

1Thank You

ANSWER

What is a homogeneous mixture

Posted by Harsh Singh 2 years, 7 months ago

CBSE > Class 09 > Science