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Limitations of J.J Thomson's model of an atom: Thomson’s model failed to explain the results of the alpha particle scattering experiment that was given by Rutherford. One of the major drawbacks of his model is that there were no experimental pieces of evidence provided by him. He failed to explain the stability of atoms.

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Pratyush Sinha 1 year, 7 months ago

Limitations of J.J Thomson's model of an atom are :- 1)Thomson’s model failed to explain the results of the alpha particle scattering experiment that was given by Rutherford. 2)One of the major drawbacks of his model is that there were no experimental pieces of evidence provided by him. 3)He failed to explain the stability of atoms.

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ANSWER

What is movement

Posted by Abhimanyu Singh 1 year, 7 months ago

CBSE > Class 09 > Science

2 answers

Deban Chakraborty 1 year, 7 months ago

Is there any other name of movement like voluntary or involuntary

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Pratyush Sinha 1 year, 7 months ago

Are you in class 1 or 2 ? why are you asking this stupid question?

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ANSWER

Distinguish between loudness and intensity of sounf

Posted by Dakshika Rathor 1 year, 7 months ago

CBSE > Class 09 > Science

1 answers

Krishna Naik 1 year, 7 months ago

Loudness is a measure of response of our ear to the sound. It depends on the amplitude. It's S.I unit is decibel(dB) Intensity of sound is the energy passing per second per unit area normal to the direction of energy flow. It's S.I unit is watt/m².

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ANSWER

What is principal of conservation of momentum?

Posted by Koyna Tulshyan 1 year, 7 months ago

CBSE > Class 09 > Science

1 answers

Srishti Singh 1 year, 7 months ago

The principle of conservation of momentum states that if two objects collide, then the total momentum before and after the collision will be the same if there is no external force acting on the colliding objects.

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ANSWER

1 horse power is equal to :-

Posted by Sudhir Kumar 1 year, 7 months ago

CBSE > Class 09 > Science

5 answers

Smriti Gupta 1 year, 7 months ago

746 watt

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Raunak Yadav 1 year, 7 months ago

746 watt

1Thank You

Vivek Wayam 1 year, 7 months ago

746 watt

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Koyna Tulshyan 1 year, 7 months ago

746 watt

1Thank You

Vishnu Barnwal 1 year, 7 months ago

786watt

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ANSWER

What is vermicompost

Posted by Srajan .. 1 year, 7 months ago

CBSE > Class 09 > Science

3 answers

Lubhash Patel 1 year, 7 months ago

The process in which the waste material like livestock excreta, vegetables waste, animal refuse is decomposed in pits and put earthworms in it to compost it is called vermi - compost

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Hari Shva 1 year, 7 months ago

The process in which form waste material like lives stock excreta( cow dung etc..) vegetable waste, animal refuse domestic waste sewage waste, straw eradicated weeds etc.. is decomposed in pits is known as vermi- composting

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Vansh Goyal 1 year, 6 months ago

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What do you mean by vermicompost

Posted by Srajan .. 1 year, 7 months ago

CBSE > Class 09 > Science

2 answers

Saksham Joshi 1 year, 6 months ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
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Ask specific question which are clear and concise.

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Hari Shva 1 year, 7 months ago

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A person takes concentrated solution of salt after sometime he starts vomiting what is the phenomenon are responsible for such situations?explain

Posted by Lovejot Kaur 1 year, 7 months ago

CBSE > Class 09 > Science

1 answers

Koyna Tulshyan 1 year, 7 months ago

the person's body leaves the water(cells in the body because of hypertonic solution) due to being in a hypertonic solution. This phenomenon result into vomiting.

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ANSWER

All the formulae of class 9 phy

Posted by Ananya M 1 year, 7 months ago

CBSE > Class 09 > Science

1 answers

Sudhir Kumar 1 year, 7 months ago

Already in book

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ANSWER

If an atom contains one electron and one proton, will it carry any charge or not?

Posted by Tanvi Kapasiya 1 year, 7 months ago

CBSE > Class 09 > Science

4 answers

Varshika Ganesh Babu 1 year, 7 months ago

There is no charge it will be neutral

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Koyna Tulshyan 1 year, 7 months ago

It will carry

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Sudhir Kumar 1 year, 7 months ago

No, it will carry no charge because it is full fill

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Yuvika Yuvika 1 year, 7 months ago

It will carry

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ANSWER

दो वस्तुएं एक साथ उधवार्धर दिशा में क्रमशः 10 मीटर प्रति सेकंड तथा 15 मीटर प्रति सेकंड के वेग से फेंकी जाती है उनकी मातम ऊंचाई में अनुपात ज्ञात कीजिए

Posted by Vipul Singh 1 year, 7 months ago

CBSE > Class 09 > Science

1 answers

Prasanna V.Prasanna 1 year, 7 months ago

Idk

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ANSWER

Air mixture of effects

Posted by Thanziya Tanziya 1 year, 7 months ago

CBSE > Class 09 > Science

1 answers

Koyna Tulshyan 1 year, 7 months ago

The air in Earth's atmosphere is made up of approximately 78 percent nitrogen and 21 percent oxygen. Air also has small amounts of other gases, too, such as carbon dioxide, neon, and hydrogen

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ANSWER

How to pass in exam

Posted by Harsh Dubey 1 year, 7 months ago

CBSE > Class 09 > Science

5 answers

Akanksha Shah 1 year, 7 months ago

Padh le bhai

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Sudhir Kumar 1 year, 7 months ago

Bada honhar bacha ha

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Sudhir Kumar 1 year, 7 months ago

Ya Tejasvi balak kaha ka ha bahi

1Thank You

Sagar Dhage 1 year, 6 months ago

Padh le madarchod

4Thank You

Krishna Agrawal 1 year, 7 months ago

Just make some chits of answers and hide them in your pocket or the easier way is to solve a sample paper

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ANSWER

The kinetic energy of an object of mass M moving in a velocity of 5 M per second in 23 joules

Posted by Jisso Kim 1 year, 7 months ago

CBSE > Class 09 > Science

2 answers

Krishna Agrawal 1 year, 7 months ago

Mass is 1.84 kg

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Harsh Dubey 1 year, 7 months ago

Lanoda

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ANSWER

What are the important point to remember in physics?

Posted by Siddhi Asawara 1 year, 7 months ago

CBSE > Class 09 > Science

5 answers

Pratham Ojha 1 year, 7 months ago

S:I units, formulas, numerical, practice, and the most important is read the book again and again.

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Sudhir Kumar 1 year, 6 months ago

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

1Thank You

Krishna Agrawal 1 year, 7 months ago

Just do some sample papers and you will find out

1Thank You

Vishesh Yadav 1 year, 7 months ago

Are Google par sirch

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Dilbag Singh Singh 1 year, 7 months ago

What is given that and find and most important is si unit

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ANSWER

How can you check the purity of solids ?

Posted by Unnati Verma 1 year, 7 months ago

CBSE > Class 09 > Science

1 answers

Krishna Agrawal 1 year, 7 months ago

By their boling point

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ANSWER

What is evaporation? How can the evaporation of a liquid be made faster

Posted by Fatima Zafar 1 year, 7 months ago

CBSE > Class 09 > Science

2 answers

Sudhir Kumar 1 year, 7 months ago

It is change of state from liquid into vapour known as evaporation. It can be increased by increase in temperature, increase in surface area

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Krishna Agrawal 1 year, 7 months ago

Evaporation is a surface phenomenon. It is change of state of liquid below it's boiling point . It can be increased by increase in surface are , temperature etc

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ANSWER

Xanthium and parthineium are example ok

Posted by Aakash Yadav 1 year, 7 months ago

CBSE > Class 09 > Science

4 answers

Keshav Kumar 1 year, 7 months ago

Weeds

0Thank You

Princy Kumari 1 year, 7 months ago

They are examples of weeds( weeds are unwanted plants which grow on an open field and they are not valued where it growing)..

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Shreshth Shukla 1 year, 7 months ago

Weeds

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Naman Yadav 1 year, 7 months ago

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ANSWER

Note is a

Posted by Aakash Yadav 1 year, 7 months ago

CBSE > Class 09 > Science

1 answers

Aanya Sharma 1 year, 7 months ago

Mixture of several frequencies

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ANSWER

What is the different between noise and music? Can music become noise sometimes?

Posted by Pratibha Tyagi 1 year, 7 months ago

CBSE > Class 09 > Science

3 answers

Satish Kumar 1 year, 7 months ago

Yes

1Thank You

Rahul Patel 1 year, 7 months ago

Noise is unpleasant to ears. Where sound is soft melodious and pleasant to ears. Yes sometimes by increasing pitch, frequency,and some other factors the sound can also become noise.

2Thank You

Bishakha Padhi 1 year, 7 months ago

Doubt in this chapter

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ANSWER

Important topic of diversity in living organisms

Posted by Anshika Negi 1 year, 7 months ago

CBSE > Class 09 > Science

2 answers

Raunak Yadav 1 year, 7 months ago

Animal Kingdom and Plant Kingdom

1Thank You

Hrishika Garsa 1 year, 7 months ago

1. Classification and Evolution 2. The Hierarchy 3. Fungi 4. Plantae 5. Animalia 6. Thallophyta 7. Pteridophyta 8. Gymnosperm 9. Angiosperm 10. Pisces 11. Cyclostomata 12.Reptilia 13. Mammalia

1Thank You

ANSWER

Notes of sound chapter

Posted by Raj Raj 1 year, 7 months ago

CBSE > Class 09 > Science

1 answers

Anshika Negi 1 year, 7 months ago

There are some important topic - ~what is sound ~how do we produce sound ~ propagation of sound ~characteristics of sound waves ~reflection of sound ~. range of hearing ~ application of ultrasound ~ structure of human ear

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ANSWER

You want to wear your favorite shirt to a party, but the problem is that it is still wet after wash. What steps would you take to dry it faster

Posted by Lakshay Gupta 1 year, 7 months ago

CBSE > Class 09 > Science

1 answers

Rahul Patel 1 year, 7 months ago

To dry it faster first you have to find area where wind is blowing fast. Secondly,sun rays should be on it so water evaporate faster.

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ANSWER

Difference between high pitch and low pitch

Posted by Krishna Vishwakarma 1 year, 7 months ago

CBSE > Class 09 > Science

3 answers

Vishesh Yadav 1 year, 7 months ago

High pitch is high Low pitch is low

0Thank You

Rahul Patel 1 year, 7 months ago

Hight pitch more sound low pitch less sound because of frequency is more and less.

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N P 1 year, 7 months ago

High pitch sound is more movement of particles and low pitch is less movement of particles

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ANSWER

What is the purpose of bee keeping

Posted by Kshitij Sharma 1 year, 7 months ago

CBSE > Class 09 > Science

2 answers

Princy Kumari 1 year, 7 months ago

For the production of honey and wax.

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Srijit Singh 1 year, 7 months ago

Production of honey.

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ANSWER

What are molecule

Posted by Kunal Singh 1 year, 7 months ago

CBSE > Class 09 > Science

5 answers

Aashish Kumar 1 year, 7 months ago

Group of atom is called molecule

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Siddharth Singh 1 year, 7 months ago

The smallest entity of a compound Now, all these reactions and combinations were going on , so we needed to find some laws that can govern the chemical reaction.

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Harshit Kumar 1 year, 7 months ago

Molecules is a smallest part of any substance which do not takes part in chemical reaction but exist in free state

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Manya Khorana 1 year, 7 months ago

A molecules is a smallest particles of a substance which has the properties of that substances and can exist in the free state

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Shreya Bhatt 1 year, 7 months ago

A molecules is a smallest particles of a substance which has the properties of that substances and can exist in the free state

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ANSWER

If the velocity of the body is 7 cm/s. Then find the velocity after 10 sec .