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

Because if you will kick any thing than we will also get any reaction like if you will kick football then you will get some what vibration in your leg

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Write the composition of alpha, beta and gamma rays?

Posted by Nitesh Khulal 7 years, 4 months ago

CBSE > Class 09 > Science

1 answers

. . 7 years, 4 months ago

Alpha particles are released by high mass, proton rich unstable nuclei. The alpha particle is a helium nucleus; it consists of two protons and two neutrons. It contains no electrons to balance the two positively charged protons. Alpha particles are therefore positively charged particles moving at high speeds. Beta particles are emitted by neutron rich unstable nuclei. Beta particles are high energy electrons. These electrons are not electrons from the electron shells around the nucleus, but are generated when a neutron in the nucleus splits to form a proton and an accompanying electron. Beta particles are negatively charged. Gamma rays are electromagnetic waves of very short wavelength and high frequency. Gamma rays are emitted by most radioactive sources along with alpha or beta particles. After alpha or beta emission the remaining nucleus may still be in an excited energy state. By releasing a gamma photon it reduces to a lower energy state. Gamma rays have no electrical charge associated with them.

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What is positive and negetive accleration

Posted by Aryan Tungal 7 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Tanay Falor 7 years, 4 months ago

When the velocity increses then the acclaration is +ve When velocity decreses then accelaration is negative

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what is mixed cropping?

Posted by N D 7 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Rudra Thakkar 7 years, 4 months ago

When the seeds of different crops are mixed and then broadcasted in the soil is called mixed cropping

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Aditya Kumarprasad 7 years, 4 months ago

Where all the crop and patterns are mixed and having in one row wheat second row garlic etc

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Which is the largest cell in the human body?

Posted by Suryakant Kumar 7 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Aryan Tungal 7 years, 4 months ago

Answer is ovum

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Gaurav Seth 7 years, 4 months ago

The largest cell in the human body is the female egg, also known as ovum; it's 1000 micrometres in diameter.

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What is the mean of canadidates

Posted by Chanchal Garg 7 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Kharwil Gopiyani 7 years, 3 months ago

Candidates means an member of the group

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Ajay Panwar 7 years, 4 months ago

The people standing in elections are candidates

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State of matter?

Posted by Hitesh Maan 7 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Kharwil Gopiyani 7 years, 3 months ago

3 solid liquid and gas

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Gaurav T 7 years, 4 months ago

Liqiud,gas,plasma,solid and bose-einstein condensate these r the five states of matter

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Rishita Singh 7 years, 4 months ago

Solid , liqiud , gas , plasma and BEC

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Ansh Namdev 7 years, 4 months ago

There are three state of matter: 1) Solid 2) Liquid 3) Gas

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Pranita Dadhe 7 years, 4 months ago

Solid , liquid , gas

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What is the define od force

Posted by Chanchal Garg 7 years, 4 months ago

CBSE > Class 09 > Science

0 answers

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What is canal rays

Posted by Prakash Kumar Sharma Sharma 7 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Gaurav Seth 7 years, 4 months ago

Canal rays are positively charged radiations. These rays consist of positively charged particles known as protons. They were discovered by Goldstein in 1886.

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A body weighs W1 in air and W2 in water. What is it relative density

Posted by Nihar Agrawal 7 years, 4 months ago

CBSE > Class 09 > Science

0 answers

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What is the difference between pathogens and vectors

Posted by Anusree J 4 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 4 years, 9 months ago

A pathogen is an agent that causes disease, such as a virus, bacterium, protozoan, or parasite. A vector is an organism, often an arthropod, that carries a pathogen to its host.

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what is drawback Of Dlton

Posted by Prashant Rai 7 years, 4 months ago

CBSE > Class 09 > Science

0 answers

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What is the another name of alpha particle.

Posted by Vipin Kumar 7 years, 4 months ago

CBSE > Class 09 > Science

0 answers

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Explain infictious and non infictious causes

Posted by Preet Dhok 7 years, 4 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

What is the melting point of water

Posted by Touseef Akhtar 7 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Aaryan Kathuga 7 years, 4 months ago

0° os the melting and freezing point of water

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Bhavya Singh 7 years, 4 months ago

0°

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Which island made up of clora of south africa or india

Posted by Tejas Kumar 7 years, 4 months ago

CBSE > Class 09 > Science

0 answers

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is fluid contained inside nucleus ?

Posted by Bhupendra Singh 7 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Swaraj Mahto 7 years, 4 months ago

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What is the difference between BOD and COD

Posted by Subhash Chandra 7 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 4 years, 9 months ago

COD is closely related to BOD or Biochemical Oxygen Demand, the difference being that BOD is a test of the level of organic matter that can be biologically oxidised while COD is a test of the amount of organic matter that can be chemically oxidised.

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Why it is said that nitrogen is very important for us

Posted by Laxmi Narayan Dash 7 years, 4 months ago

CBSE > Class 09 > Science

3 answers

Swaraj Mahto 7 years, 4 months ago

It is said because humans are depend on plants and animals and animals are depend upon nitrogen to produce protein which is consumed by animals and then animals and directly plants are consumed by us.

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Aaryan Kathuga 7 years, 4 months ago

The nitrogen is very important for us.if there will be no nitrogen and anyone starts fire at some small place it will spread from there to other places and all the earth catches fire and all thigs will burnt and all will finished and we goes to stone from 21st sanctuary

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Bhavya Singh 7 years, 4 months ago

it is said that nitrogen is very important for us as all human beings depend on plants and plants need nitrogen for preparing their food ultimately nitrogen is important for human beings

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Name four basic features used for classifying living being

Posted by Abhishek Singh 7 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Tejas Kumar 7 years, 4 months ago

Air , water , land according to aristotle but it is not fully right classification is properly divide into class , order , family , genus , species these are basic feature to classifying living being or organisms.....thnx for great ques...

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What is crest

Posted by Anish Kumar 7 years, 4 months ago

CBSE > Class 09 > Science