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particles of matter have space between them particles of matter are continuously moving particles of matter are very small particles of matter attract each other

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Mathematical formulation of second law of motion. Explain.

Posted by Rohini Chaudhary (Desi Jaatni) 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Jp Soni 7 years, 6 months ago

It states that rate of change in momentum is equals to the applied force ..................as we know that force is equals to F=M×a.........(1)(here accelaratiin is defined as a=v-u/t) so putting the value of a in the equ. 1 we have .........F=M(v-u)/t or (Mv-Mu)/t here Mv and Mu are the final and initial momentum of the body so now we have F=(Pf-Pi)/t ....wow this is the newtons second law in mathematical form derived by the definition of force

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Yogita Ingle 7 years, 6 months ago

Let mass of an moving object = m

Let the velocity of the object changes from 'u' ; to 'v' in the interval of time 't'

This means, Initial velocity of the object = u.
Final velocity of the object = v
We know that momentum (p) = Mass x velocity
Therefore,
Momentum (p) of the object at its initial velocity u = m × u = mu
Momentum (p) of the object at its final velocity v = m × v = mv
The change in momentum = mv − mu
Rate of change of momentum = (mv−mu)/ t

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When a carpet is beaten with a stick, dust comes out of it. Explain.

Posted by Rohini Chaudhary (Desi Jaatni) 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 7 years, 6 months ago

Beating of a carpet with a stick; makes the carpet come in motion suddenly, while dust particles trapped within the carpet, however, have the tendency to remain in rest, and in order to maintain the position of rest they come out of the carpet. This happens because of the application of Newton’s First Law of Motion which states that any object remains in its state unless any external force is applied over it.

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What is the first equation of motion

Posted by Harsh Tiwari 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 7 years, 6 months ago

The final velocity (v) of a moving object with uniform acceleration (a) after time, t.

Let, the initial velocity = u.
Final velocity = v.
Time = t
Acceleration = a
We know that, Acceleration (a) =Change in velocity/Time taken
⇒a = (Final velocity-Initial velocity)/Time taken
⇒ a = (v − u)/t
⇒ at = v − u
⇒ at − v = −u
⇒ −v = −u − at
⇒ v = u + at ---(i)
This equation is known as first equation of motion.

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What is phospho and bialayer

Posted by Wasim Khan 7 years, 6 months ago

CBSE > Class 09 > Science

0 answers

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What is mitochrondia

Posted by Shaurya Rajput 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Deekshant Singhal 7 years, 6 months ago

Mitochondria has the double layer around it the inner surface of Mitochondria have deep in folds called cristae. It is a site of cellular respiration. It is called SEMI AUTONOMUS CELL because it has its own ribosomes and DNA ( DEOXYRIBONUCLEIC ACID) It is also called powerhouse of cell because the cristae has oxysomes on its body which trap the oxyzen and breaks the stored glucose which produces energy in form of ATP (ADENOSINE TRIPHOSPATE)

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Harsh Tiwari 7 years, 6 months ago

A cell organelle which stores energy in the form of ATP which is used to bring energy requiring activities of the cell

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How much time child take to come outside from stomach

Posted by Krishna Jindal 7 years, 6 months ago

CBSE > Class 09 > Science

5 answers

Jp Soni 7 years, 6 months ago

For a perfect mature delivery it is 9month 9days and 9hours

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Amanvir Yadav 7 years, 6 months ago

9 months for mature snd 7to 8 months for imature

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Rahul Soni 5 years, 11 months ago

Fnfhchchuccjjcbcbfvct????????????????????????????????????????cjchxhxh gt t?????????????????????????????????????️??????️?????????????????????????????????????????????????????????????????️???️???✨?✨?????????????✨?✨?✨??️???️?️???️?️????????????✨✨?✨?✨?✨?✨?️✨?️??️?????️??????????????????????????????✨✨?️✨?✨??✨✨?✨?️✨?️✨?️??✨✨?✨?✨?✨?✨?✨✨?✨?✨?✨?✨✨?✨?✨?✨✨?✨?✨?✨?✨?✨?✨?️✨✨?️?✨?✨?️✨?️✨??✨?️✨?✨?✨?✨?✨?✨?️✨?️✨✨?️✨?️✨✨?️✨?️✨?️✨?️✨✨?️✨?️✨?️✨✨?️✨?️✨?️✨✨?️✨?️✨?️✨?️✨?️✨✨?️✨?️✨?️✨?️✨?️✨✨?️✨?️✨?️✨?️✨✨?️✨?️✨?️✨?️✨?️✨✨?️✨?️✨?️✨?️✨✨?️✨?️✨?️✨✨?️✨?️✨?️✨✨?️✨?️✨

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Hanshika Nishad 7 years, 6 months ago

It took 9 months for a child to come outside from stomach

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Talika Chouhan 7 years, 6 months ago

9 months

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What Is Retardation?

Posted by Nakul Jain 7 years, 6 months ago

CBSE > Class 09 > Science

5 answers

Jp Soni 7 years, 6 months ago

When speed of object decreases with time then then it is called retardation

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Anshika Prakash 7 years, 6 months ago

When the initial velocity is more than the final velocity, the acceleration gets a negative sign. This is also called retardation.

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Deekshant Singhal 7 years, 6 months ago

Retardation is the acceleration in opposite direction. Car when applies brakes we say it is retarding

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Harsh Tiwari 7 years, 6 months ago

Retardation is actually acceleration with the negative sign .

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Vishal Sharma 7 years, 6 months ago

Acceleration in negative

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What is a matrix of a bone

Posted by Varshini M 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 7 years, 6 months ago

The deposition of calcium and phosphorus makes the matrix of the bone hard.

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What causes motion

Posted by Divyanshu Gupta 7 years, 6 months ago

CBSE > Class 09 > Science

3 answers

Anshika Prakash 7 years, 6 months ago

External unbalanced force

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Harsh Tiwari 7 years, 6 months ago

Motion cause movement in th body

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Nakul Jain 7 years, 6 months ago

Unbalanced force

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What is the function of ER

Posted by Himanshu Rathi 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Arjun Singh 7 years, 6 months ago

1. Place for Ribosome attachment 2. Protien and Lipid synthesis

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Nityam Ayush 7 years, 6 months ago

1.it helps in intracelular transport. 2.it helps in cell division.

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What is plasma membren

Posted by Sachin Kumar 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Disha Sharma 7 years, 6 months ago

Plasma membrane is the outer covering of the cell also known as the selectively permeable membrane .it allows only some materials to enter and exit the celland also protects the cell

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Sachin Kumar 7 years, 6 months ago

Plasma membrean protect the cell

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Why Clouds were does not come down

Posted by Shivam Pandey 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Himanshu Rathi 7 years, 6 months ago

Because the clouds are too light

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Can someone give me the question paper of science???

Posted by Sakshi Tomar 7 years, 6 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Guys today us my last exam let me know who need the question paper

Posted by Anand Dubey 7 years, 6 months ago

CBSE > Class 09 > Science

3 answers

Chirag Goyal 7 years, 6 months ago

Bhai mere paper chal rahe hai mujhe dede

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Khushi Kumari 7 years, 6 months ago

I also need question papers..

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Prashank Yadav 7 years, 6 months ago

Bro i need

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What is function of stratified epithelial tissue

Posted by Aman Choksey 7 years, 6 months ago

CBSE > Class 09 > Science

3 answers

Lavanya Jain 7 years, 6 months ago

It's main function is to protect our body but it present in the internal organ covering

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Shreeya Gupta 7 years, 6 months ago

To give protection in area that undergoes wear and tear

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Himanshu Rathi 7 years, 6 months ago

To protect our smooth part of body lotion like linning of mouth

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Calculate acceleratiom due to gravityon the surface of satellite havung a mass of 7.4x10power 22kg and radius 1.74x10power6 m

Posted by Anand Dubey 7 years, 6 months ago

CBSE > Class 09 > Science

0 answers

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Have you ever experienced that the train in which you are sitting appears to move while it is rest ?Explain

Posted by Nidhi Verma 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Devansh Chauhan 7 years, 6 months ago

velocity

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Why cell requires oxygen.if it has mitoxhondria to give energy

Posted by Shivam Mishra 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Mohd Faaiz 7 years, 6 months ago

Mitochondria have their own DNA and ribosomes so it is able to produce some of their own proteins mitocondria does not produce oxygen as oxygen is very important in the survival of a cell . Status Allah require oxygen

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Relation between chromosone and chromatin

Posted by Arihant Malu 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Mohd Faaiz 7 years, 6 months ago

Nucleus contain chromosomes which are the unit of Inheritance of features of their parents to the next generation. Chromosomes contain DNA functional segments of DNA are genes but in a Cell when the cell is not dividing the DNA is present as a part of chromatin material in the cell but when the cell is about to divide chromatin material get organised into the chromosomes chromatin material look like and Tangled mass of the thread like structures

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What are theain characters of gymnosperm ?

Posted by Mohit Thakur 7 years, 6 months ago

CBSE > Class 09 > Science

0 answers

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Lpg full form

Posted by Yadav Yadv 7 years, 6 months ago

CBSE > Class 09 > Science

3 answers

Nityam Ayush 7 years, 6 months ago

Liquified petroleum gas

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Chanchal Mittal 7 years, 6 months ago

Liquified petroleum gas

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Yadav Yadv 7 years, 6 months ago

Haj

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What is free fall.........plz tell me the ans. Fast........ I have to prepare for exam..........

Posted by Sakshi Mishra 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Diksha . 7 years, 6 months ago

When an object falls from certain height under the influence of gravitational force with no other force acting on it is known as free fall

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Talika Chouhan 7 years, 6 months ago

An object is fall from the height it is known as free fall

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A force of 4.0N acts on a body of mass 2.0 kg for4.0s . Assuming the body to be initially at rest, find

Posted by Abhay Sharma 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Nityam Ayush 7 years, 6 months ago

Find what

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Krishana Singh 7 years, 6 months ago

What

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Send me images of your schools question paper then I will send you mines. Thank you very much

Posted by Jay Chaturvedi 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Jay Chaturvedi 7 years, 6 months ago

Science

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Garvita Kothari 7 years, 6 months ago

Which question paper

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Difference between merismatic and permanent

Posted by Ashishpanday Akash 7 years, 6 months ago

CBSE > Class 09 > Science

4 answers

Piyush Gupta 7 years, 6 months ago

Meristematic tissues: 1. These tissues have the capacity to divide. 2. They have thin cellulose wall. 3. They do not have intercellular spaces. 4. They contain dense cytoplasm with prominent nucleus. 5. They contain many small vacuoles in their cytoplasm. 6. They produce permanent tissues. 7. They are responsible for the primary and secondary growth of the plants. Permanent tissues: 1. These tissues have lost the capacity of division. 2. They have thick cellulose wall. 3. They have large intercellular spaces. 4. They contain thin cytoplasm with normal nucleus. 5. They contain a single large vacuole in their cytoplasm. 6. They are produced by meristemic tissues. 7. These tissues add to the various growths.

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Jay Chaturvedi 7 years, 6 months ago

When meristematic tissue come under the process of differentiation they form permanent tissue

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Pridiksha Suresh Reddy 7 years, 6 months ago

permanent don't divide

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Pridiksha Suresh Reddy 7 years, 6 months ago

Meristematic are dividing tissue while permanent don't dibid8

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Which precaution should be taken while preparing slide of onion peel?