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The neuron is the basic working unit of the brain, a specialized cell designed to transmit information to other nerve cells, muscle, or gland cells. Neurons are cells within the nervous system that transmit information to other nerve cells, muscle, or gland cells. Most neurons have a cell body, an axon, and dendrites.

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Ashvanth Gopal 5 years, 11 months ago

It's functions is to send messages to brain about sensations and body conditions

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what is the difference between plants and animal

Posted by Himanshu Chauhan 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Diya Save 5 years, 11 months ago

plants have chlorophyll animals don't plants are autotrophs animals are heterotrophs plants can't move animals can plants take in co2 and give out o2 whereas animals take in o2 and give out o2 plants donot have sense organs animals have hence plants

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On electrolysis 225gm of water gave 25gm of hydrogen and 200gm of oxygen in another experiment when 10gm of hydrogen burned with 80gm of oxygen. 90gm of water was formed. Show by calculating of the validity of law of constant composition

Posted by Pradeep Khare 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Shivam Pal 5 years, 11 months ago

In case of electrolysis of 225grams water Hydrogen and oxygen is equal to water Hydrogen is 25 gram and oxygen is 200 gram is equal to 225 grams Another example 10 gram of hydrogen + 80 gram of oxygen equal to 90 gram of water It is also equal It show that in law of constant the mass is niether destroyed and neither created

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What is negative work

Posted by Jaskaran Singh 5 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Yogita Ingle 5 years, 11 months ago

If the force and the displacement are in opposite directions, then the work is said to be negative. For example if a ball is thrown in upwards direction, its displacement would be in upwards direction but the force due to earth’s gravity is in the downward direction.

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Sarwar Hussain 5 years, 11 months ago

Work done is negative when the force acts opposite to the direction of displacement.

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Gravitational force kya hota hai

Posted by Sarwar Mohammad 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Harsh Maurya 5 years, 11 months ago

The phenomenon force of attraction between the masses called gravitational force The force exerted by earth to attracted any object to itself is called gravity

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give an example each of monocotyledon and dicotyledon plants?

Posted by Mohit Kumar 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 5 years, 11 months ago

Based on the number of cotyledons present in the seed, all flowering plants are classified into monocots and dicots. Monocots are called as monocotyledonous plants and dicots are called as dicotyledonous plants.
Monocotyledenous seeds have single cotyledon in them whereas Dicotyledenous seeds have two cotyledons in them.
Grains, banana, plam, onions, and grass serve as the examples for monocots whereas legumes, mint, tomato and mango tree serve as examples of dicots.

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Cell as a Basic unit of life notes

Posted by Priyanshu Massey 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Tariq Khan 5 years, 11 months ago

The smallest functional unit of life is cell, discovered by Robert Hooke in 1665. A cell can independently perform all necessary activities to sustain life. Hence cell is the basic unit of life. There are two types of cells → plant cell and animal cell.

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Why plants die when over water?

Posted by Shaili Shree 5 years, 11 months ago

CBSE > Class 09 > Science

2 answers

A A 5 years, 11 months ago

Because when there is more water the air is replaced with water so due to lack of air or oxygen plants die.

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Khushi Jain 5 years, 11 months ago

Due to endoosmosis may be

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Define kinetic energy.

Posted by Atul Prasad Majumder 5 years, 11 months ago

CBSE > Class 09 > Science

3 answers

Gaurav Seth 5 years, 11 months ago

Kinetic energy is the energy possessed by a body by virtue of its motion. All moving bodies have kinetic energy. A body of mass m moving with a velocity v has a kinetic enegy E = ½ mv². Note that kinetic energy is always positive.

Alternately we can define K.E as follows.
The work done by a body by virtue of its motion is called kinetic energy.

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Amayra 1111 5 years, 11 months ago

Motion of the particles are callled kinetic energy

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Usasee Bhattacharya Usasee Bhattacharya 5 years, 11 months ago

The energy poosed by the body at a state of motion is called Kinetic energy. K.E=1/2*m*v*v M is mass V is velocity.

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ANSWER

list any six character of parenchyma tissue

Posted by Ajay Anjana 5 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Rakshit Goel 5 years, 11 months ago

The characteristics of parenchyma tissue are They are living cells They are the simplest of simple permanent tissues in plant They have dense cytoplasm and nucleus They have in cell walls without anything thickening The main function is to store food They have irregular shape and have intercellular spaces between the cells

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Ashish Raj Samrat 5 years, 11 months ago

See on s. Chand

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What is chemical formula of Lime stone?

Posted by Ashutosh Kumar Sagar 5 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Rakshit Goel 5 years, 11 months ago

Limestone is a type of calcium carbonate, its formula is CaCO³

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Ashutosh Kumar Sagar 5 years, 11 months ago

CaO3

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ANSWER

what is velocity

Posted by Mohammed Firdhouse Mk 5 years, 11 months ago

CBSE > Class 09 > Science

7 answers

Fun With Rishi 5 years, 11 months ago

Velocity is a speed of an object moving in a definite direction and AVERAGE VELOCITY =__V_+__U__ T

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Shubham Shrivastava 5 years, 11 months ago

Rate of change in displacement of body.

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Ashish Raj Samrat 5 years, 11 months ago

Rate of change in displacement of body

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Ajay Anjana 5 years, 11 months ago

the change in time or displacement is called velocity

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Radhe Shyam 5 years, 11 months ago

Velocity = The displacement travelled per unit time is called velocity. • It is vector quantity • Velocity = Speed / Time • Its SI Unit is m/sec

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Suhani Nalwaya 5 years, 11 months ago

Rate of change of displacement

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Neha Verma 5 years, 11 months ago

Velocity of the body is the distance travelled by it per unit time in a given direction.

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What is the C G S of force ?

Posted by Mukta Singh 5 years, 11 months ago

CBSE > Class 09 > Science

5 answers

Shubham Shrivastava 5 years, 11 months ago

Dyne is write

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Shubham Shrivastava 5 years, 11 months ago

Newton

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Ashish Raj Samrat 5 years, 11 months ago

1n=10 to the power 5 dyne

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Aynal Hoque 5 years, 11 months ago

Dyne

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Harsh Mishra 5 years, 11 months ago

The Unit of Force in C.G.S. system is called as Dyne (d). It is the force required to deliver an acceleration of 1 cm/s to a body of mass 1 g.

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What is immunisation in easy way..

Posted by Anjali Tiwari 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Priyanshu Singh 5 years, 11 months ago

Immunisation describes the process whereby people are protected against illness caused by infection with micro-organisms (formally called pathogens)

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Write short note on plastids

Posted by Devraj Parmar 5 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Maakalyani Studio 5 years, 11 months ago

....6..plastids are also known as 'kitchen of the cell'

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Yogita Ingle 5 years, 11 months ago

Plastids

Plastids refer to the double membrane bound organelles found in plant cells.
They are found in the cytoplasm.
Plants make and store food in plastids.
They have their own DNA and Ribosomes.
They can be classified into two types:

Chloroplast
Leucoplast
Chloroplasts are the plastids containing the green pigment called chlorophyll. They are necessary to carry the process of photosynthesis.

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What will be the force of gravity at the center of the earth and why

Posted by Chaitrashree S 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Anushree Kandarkar 5 years, 11 months ago

The force of gravity at the centre of the earth will be zero because the force of gravity goes on decreasing as it moves away from the surface of the earth and ultimately it becomes zero.

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Half yearly model question

Posted by Santhosh Kumar 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Ashish Raj Samrat 5 years, 11 months ago

Total syllabus of half term jo class me teach Kiya gaya hai

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How we suffered from Chicken or Small pox? How is it spread?

Posted by Shaili Shree 5 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Ayush Kumar ? 5 years, 11 months ago

Chickenpox is an infection caused by the varicella-zoster virus. Chickenpox is usually a mild illness in children. Infection in teenagers, adults and people with weakened immune systems can be more serious.

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Archana Sharma 5 years, 11 months ago

By ttetment

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Who is kitchen of cell?

Posted by S Pandey 5 years, 11 months ago

CBSE > Class 09 > Science

10 answers

Neha Verma 5 years, 11 months ago

Plastids

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Harsh Maurya 5 years, 11 months ago

Chloroplast is kitchen of the cell because it cotain green pigments called chlorophyll that can tap the solar energy and help to make their own food through photosynthesis

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Ram Kishore Roy 5 years, 11 months ago

Chloroplast

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Mukta Singh 5 years, 11 months ago

Plastids

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Palak Yadav 5 years, 11 months ago

Chloroplast

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Ayush Kumar ? 5 years, 11 months ago

Chloroplast

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Mohamed Arshath 5 years, 11 months ago

Chloroplast

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Avni Kumari 5 years, 11 months ago

Chloroplast

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Swagat Sourav Mohapatra 5 years, 11 months ago

cytoplasm

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Krishna Gaud 5 years, 11 months ago

Plastids and chloroflast

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Define buoyancy.

Posted by Prince Sah 5 years, 11 months ago

CBSE > Class 09 > Science

3 answers

Prasanna Badiger Prasu 5 years, 11 months ago

Appilled force acting on an object in water

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Anuj Tech 5 years, 11 months ago

Simple anwser is the force that cause objects to float.

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Ayush Kumar ? 5 years, 11 months ago

The force that causes objects to float. According to the principle of Archimedes, when a solid is placed in a fluid (a liquid or a gas), it is subject to an upward force equal in magnitude to the weight of the fluid it has displaced.

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What is space station?

Posted by Ghh Kumawat 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Vikrant Singh 5 years, 11 months ago

a place where situations for life are provided in space. there scientists live and do researches

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Describe bohars midel of an atom

Posted by Khushi Jain 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 5 years, 11 months ago

Neils Bohr, a Danish physicist, in 1913 proposed model of atom which rectified the problems left by Rutherford’s Model. He proposed that

Electrons revolve round the nucleus in a fixed orbit.
He called these orbits as ‘stationary orbit’.
Each stationary orbit is associated with fixed amount of energy, thus electrons do not radiate energy as long as they keep on revolving around the nucleus in fixed orbit.

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Write the postulates and drawback of rutherford theory

Posted by Khushi Jain 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 5 years, 11 months ago

Postulates of Rutherford Atomic model are:
1. There is a positively charged centre in the atom called the nucleus. All the mass of an atom reside into the nucleus.
2.The electrons revolve around the nucleus in circular paths.
3.The size of the nucleus is very small as compared to that of the atom.
Failure or Drawbacks:
Although Rutherford model of the atom explained the nucleus in the atom. He could not explain the revolution of electrons in circular paths. An object in a revolution would radiate energy and thus the electrons would lose energy and fall toward the nucleus. Thus the atom should collapse very quickly and the matter should not be in state as we know today.We know that atoms are quite stable.

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How is valency of atom related to its electronic configration...

Posted by Khushi Jain 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 5 years, 11 months ago

Valency is the combining capacity of an atom. Valency is calculated by using number of valence electrons present in an atom. The number of electrons present in the last shell of an atom and take part in chemical bond formation are known as valence electrons.The number of electrons which an atom has in its last orbit can be found out by writing the electronic configuration of an atom. So, electronic configuration expresses the valence electrons which are related to the valency of an atom.

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Diff btwn carrier and vector

Posted by Khushi Jain 5 years, 11 months ago

CBSE > Class 09 > Science

3 answers

Divyansh Goel 5 years, 11 months ago

Vector : they are the intermediaries which carry infectious agents from an infected person to a healthy person. Example : sandfly is the vector of kala azar Carrier: they are thethe organisms which causes diseases from their body itself to a healthy person Example :HIV carrier

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Khushi Jain 5 years, 11 months ago

Ok.. no problem..

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❌Vivek Kumar Vdy❌ 5 years, 11 months ago

Mujhe nahi malum

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Why do stars twinkle

Posted by Khushi Jain 5 years, 11 months ago

CBSE > Class 09 > Science

3 answers

Samruddhi Br 5 years, 11 months ago

Stars shine because they contain plasma state. This helps them to shine. Refer Bose Einstein condensate.

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Bro . 5 years, 11 months ago

Star are very far from our earth its light come on the earth by passing through atmosphere and due to gases in atmosphere the light of stars come on earth by taking some some time and that is why we see stars twinkling

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Namrata Jindal 5 years, 11 months ago

Due to refraction by the atmosphere

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What are isotopes ... write two isotopes of carbon

Posted by Khushi Jain 5 years, 11 months ago

CBSE > Class 09 > Science