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

A force is an effort that changes the state of an object at rest or motion. It can change an object's direction and velocity. Force can also change the shape of an object.

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Write the steps youwould use for making tea . Use the words solvent , solute, dissolve , soluble , insoluble , filterate , residue

Posted by Lavesh Sharma 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Chirag .S 3 years, 8 months ago

Good

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Recovery of salt solution in water can be done by??

Posted by Pushti Nadkarni 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Hãrjåß Käûr 3 years, 8 months ago

By evaporation or distillation

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Describe microscopic structure of cell..?

Posted by Anjeev Shukla 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Ashu Ashu 3 years, 8 months ago

My q

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Which subject do you like ?

Posted by Praful 7609 3 years, 8 months ago

CBSE > Class 09 > Science

5 answers

Nidhi Kaurav 3 years, 8 months ago

Science ☺️

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Saloni Dixit 3 years, 8 months ago

Maths

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Muskan Malviya 3 years, 8 months ago

Hindi

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Lucky Lion 3 years, 8 months ago

Maths

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Abhinav Patil 3 years, 8 months ago

WASHINGTON SUNDAR ;)

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Define hypertonic and isotonic solution

Posted by Diya Narula 3 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Saloni Dixit 3 years, 8 months ago

When the concentration of water is higher than that of cell the cell swells up this is called hypertonic solution and when the concentration of water and cell are same and cell does not swells up then it is called isotonic solution

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Vidhi Agarwal 3 years, 8 months ago

Isotonic solution is a type of solution where no changes takes place. That cell will stay the same..

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An engine delivers 10kW of power. How much time will it take to lift a mass of 200 kg upto a height of 40 m

Posted by Shivam Kumar 3 years, 8 months ago

CBSE > Class 09 > Science

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Rutherford model What is substance

Posted by Arjun Pandey 3 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Itender Chahal 3 years, 8 months ago

Doubly heavy helium particles are called alpha particle

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Saadhikaa Vp 3 years, 8 months ago

Alpha particles

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Abhinav Patil 3 years, 8 months ago

ALPHA PARTICLES OF H²

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What is meat by aves to

Posted by Anushka Yelpale 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Lathiss Khumar 3 years, 8 months ago

Aves are commonly known as birds they have their forelimbs as wings to fly.they have a streamlined body.

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Why don't monocot produce branches?

Posted by Vathsala Prabhu 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Aman Gupta 3 years, 8 months ago

Very nice

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Is vinegar a suspension?

Posted by Mitali Mousam 3 years, 8 months ago

CBSE > Class 09 > Science

5 answers

Saloni Dixit 3 years, 8 months ago

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Bhumika Singh Raghav 3 years, 8 months ago

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Harshita Narula 3 years, 8 months ago

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Amreen Khilji 3 years, 8 months ago

No.

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Tanya Raj 3 years, 8 months ago

No vinegar is not a suspension ?

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A software that can store, manipulate and create graphical representation of data

Posted by Swapnik Shetty 3 years, 8 months ago

CBSE > Class 09 > Science

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A 10 kg mass is pushed into the air with the velocity of 12/s and it's come back to the ground in 22 sec assuming the air resistance is negligible find out the maximum height attain

Posted by Karishma Sahu 3 years, 8 months ago

CBSE > Class 09 > Science

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A bus starting from rest moves with a uniform acceleration of 0.1 m/s for 2 minutes. Find (a) the speed acquired. (B) the distance travelled.

Posted by Yagvi Gaur 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Muskan Malviya 3 years, 8 months ago

(B) the distance travelled

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What is force?explain the absolute and gravitational units.state the relation between them.

Posted by Krishna Gupta 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Princ Kumar 3 years, 8 months ago

Push or pull

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Formula of work done

Posted by Jaskaran Singh 3 years, 8 months ago

CBSE > Class 09 > Science

5 answers

Harshita Narula 3 years, 8 months ago

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Zainab Tailor 3 years, 8 months ago

W=F×s or W=Fs

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Amreen Khilji 3 years, 8 months ago

W=F×S(work done = force × displacement)

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Somya Sahoo 3 years, 8 months ago

W=F×S(work done = force × displacement)

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Divyansh Gupta 3 years, 8 months ago

W=F×S (Work =force×displacement)

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Diffrence colloidal and suspension

Posted by Yash Tandon 3 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Vishal Singh 3 years, 8 months ago

colloidal particles size - (1nm-1000nm) suspension particles size- ( >1000nm) colloidal show - Tyndall effect suspension show - also Tyndall effect colloidal particles - quite stable particles(particles not settle down) suspension - unstable particles ( particles settel down)

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Divyansh Gupta 3 years, 8 months ago

Suspension it is a heterogeneous solution having a unstable particles its particles are greater than the particles of true solution it does not show tyndall effect. Colloidal solution it is a a heterogeneous solution appears to be true solution its particles are are having a size between suspension and true solution it shows tyndall effect and the particles settle down it is also known as colloidal SOL

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Define distribution of electrons?

Posted by Kumar Savan 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Yash Gupta 3 years, 8 months ago

Distribution of electrons or arrangement of electrons in an atom(in shell or orbit) of an element is called electronic configuration. It is denoted by the 2(n)square. For example, k shell is the 1st shell so here n=1. Therefore, 2(1)square=2 It means that k shell or first shell has the capacity to hold 2 electrons. Similarly by this formula we can find the distribution of electrons in each shell. L shell or second can hold 8 electrons. M shell or third shell can hold 18 electrons. N shell or fourth shell can hold 32 electrons.

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What is defination of tissue

Posted by Dupad Dhanush M 3 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Kumar Savan 3 years, 8 months ago

Tissue is a group of cells similar in structure and function.

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Aayushi Pandey 3 years, 8 months ago

A group of cells that perform a specific function are known as tissues

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Define simple tissue?

Posted by Kumar Savan 3 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Md Faizan Faizan 3 years, 8 months ago

A group of cell combine together is called tissues

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Aayushi Pandey 3 years, 8 months ago

Simple tissue are tissue have only one type of cell

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Ravi Kumar 3 years, 8 months ago

tissue which is made up of one type of cell is called simple.

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What do you mean by scalar quantity?

Posted by Óm Upadhyay 3 years, 8 months ago

CBSE > Class 09 > Science

4 answers

Saadhikaa Vp 3 years, 8 months ago

Only magnitude

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Princ Kumar 3 years, 8 months ago

Only magnitude

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Ravi Kumar 3 years, 8 months ago

scalar quantities are those quantity which has magnitude. example:-time, length,mass, second,

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Kumar Savan 3 years, 8 months ago

Scalar quantity is defined as the physical quantity with magnitude and no direction. Ex.- mass, speed, etc.

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If a stone reaches the ground in 3s what is the height of the ground ?

Posted by Parneet Kaur 3 years, 8 months ago

CBSE > Class 09 > Science

2 answers

Princ Kumar 3 years, 8 months ago

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Satyam Bhatt 3 years, 8 months ago

Initial velocity=0 a=10m/s^2 T=3sec By using 2nd eq. Of motion s=ut+1/2at^2 s=0*3+1/2*10*3*3 s=45m Hence displacement is 45m

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Posted by Nasir Khan 3 years, 8 months ago

CBSE > Class 09 > Science

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ASK asking my question first question asking atom and molecules second question MS is equal to a l please solve the answer tell me ok thanks

Posted by Ravinder Butola 3 years, 8 months ago

CBSE > Class 09 > Science

3 answers

Ravinder Butola 3 years, 8 months ago

???

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Nasir Khan 3 years, 8 months ago

Hvc

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Ravinder Butola 3 years, 8 months ago

????

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Differentiate between impulsive and Non impulsive force and understand the use of these force in our day to day life

Posted by Shilpa Maheshwari 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Suzanne Smitha 3 years, 8 months ago

The process of minimizing an impact force can be approached from the definition of the impulse of force: If an impact stops a moving object, then the change in momentum is a fixed quantity, and extending the time of the collision will decrease the impact force by the same factor. Non-impulsive Force: A constant force acting on a body is an example of non-impulsive force Why does cricketer move his hand backwards while catching a fast moving cricket ball ?? Because, While catching a fast moving cricket ball,afielder in the ground gradually pulls his hand backward with the moving ball,In doing so, the fielder increases the time during which the high velocity of the moving ball decrease to zero. Thus, the acceleration of the ball is decreased and therefore the impact of catching the fast moving ball is also reduced. If the ball stopped suddenly then its high velocity is decreased to zero in a very short interval of time. Thus, the rate of change of momentum ofthe ball will be large. Therefore, a large force would have to be applied for holding the catch that may hurt the palm of the fielder.

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Which energy shell has higher eney L shell or N shell? Explain in detail.

Posted by Tanishq Pandya 3 years, 8 months ago

CBSE > Class 09 > Science

1 answers

Anjali Hedda 3 years, 8 months ago

N shell has most higher energy bcuz in that more electron present this is bcuz to find the capacity 9f the shell the formula is 2nsquare and N is 4 shell so it's capacity is 9f 32 shells

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Explain how L shell radiates more energy than M shell.

Posted by Tanishq Pandya 3 years, 8 months ago

CBSE > Class 09 > Science