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What do you mean by free fall ?

Posted by Ganesh P 7 minutes ago

CBSE > Class 09 > Science

3 answers

Ganesh P 29 seconds ago

When an object fall from high.there should act only one type of force that is gravitation force of earth.except gravitation force of earth no other force should have applied on the object

Ganesh P 3 minutes ago

It is the object falling towards earth under the influence of attraction force of earth or gravity.

Ganesh P 4 minutes ago

Gravity of the earth attracts every object towards its center. When an object is dropped from a certain height,it begins to fall towards earth's surface under the influence of gravitational force.such a motion of object is called free fall

ANSWER

How I make project file on topic animal and plant cell ??

Posted by Sayli Mane 2 hours ago

CBSE > Class 09 > Science

0 answers

ANSWER

Cell is a dynamic place justify

Posted by Janvi Tyagi Tyagi 6 hours ago

CBSE > Class 09 > Science

1 answers

Jyotishna Rajawat 5 hours ago

The living cell can be considered as a dynamic state because it interacts with the outer living world. Cell consists of many organelles like ribosome, mitochondria, golgi apparatus, lysosome, endoplasmic reticulum, etc. These organelles have their own functions.

ANSWER

MCQ want

Posted by Sunny Singh Sunny Singh 9 hours ago

CBSE > Class 09 > Science

0 answers

ANSWER

Bowman, s capsule

Posted by Manju Kanwar 2 hours ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 2 hours ago

Bowman's capsule is a part of the nephron that forms a cup-like sack surrounding the glomerulus. Bowman's capsule encloses a space called “Bowman's space,” which represents the beginning of the urinary space and is contiguous with the proximal convoluted tubule of the nephron.

ANSWER

60mcqs questions of physics

Posted by Pinki Kumari 21 hours ago

CBSE > Class 09 > Science

2 answers

Sunny Singh Sunny Singh 5 hours ago

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Sahil Rajput 21 hours ago

Maam

ANSWER

Define Endoplasmic Reticulum.

Posted by Riju R 1 day, 18 hours ago

CBSE > Class 09 > Science

1 answers

Sayli Mane 2 hours ago

Endoplasmic reticulum is a network of membranes inside a cell through which proteins and other molecules move. ✨ There are two type of Endoplasmic reticulum : 1 smooth endoplasmic reticulum 2 rough endoplasmic reticulum

ANSWER

The cell appear elongated, tapering at ends as observed under a microscope. It is a. sclerenchyma fibre b. striped muscle c. parenchyma d. nerve cell

Posted by Rishika Agawal 2 days ago

CBSE > Class 09 > Science

3 answers

Aarya . an hour ago

Nerve cell

D K 1 day, 7 hours ago

D

Priyanshu Anand 1 day, 21 hours ago

D

ANSWER

Explain mass

Posted by Rishipal Singh 2 days, 2 hours ago

CBSE > Class 09 > Science

2 answers

Priyanshu Anand 1 day, 21 hours ago

1) The S.I unit of mass is "kg" 2) Mass of any object doesn't change in any condition 3) mass is measured by balance and spring balance .

Sarthak Gupta 2 days ago

Mass is the quantity of matter present in a substance its formula is W/g

ANSWER

36g of sodium chloride is dissolved in 100g of water at 293k .find its concentration at this temperature

Posted by Anjali Yadav 2 days, 7 hours ago

CBSE > Class 09 > Science

2 answers

Sarthak Gupta 2 days ago

36/136 * 100 = 26.4%

Sanchita Soni 2 days, 5 hours ago

36/136×100 =>9/34×100 =>900/34

ANSWER

Why is chemistry a subject

Posted by Arpit Singh 2 days, 19 hours ago

CBSE > Class 09 > Science

2 answers

D K 1 day, 7 hours ago

Because in chemistry you are study about properties and behaviors matter

Rishipal Singh 2 days, 2 hours ago

Something which we need to study it becomes a subject

ANSWER

Bark of tree is made up of which tissue

Posted by Nothing Is Best 3 days, 3 hours ago

CBSE > Class 09 > Science

5 answers

Sweety Yadav 3 days ago

Cork

Sweety Yadav 3 days ago

Bark (protective tissue )

01_Aadeet Pataliya_Ix-B 3 days ago

Scalernchyma

Shiva Singh 3 days ago

Photosynthesis

Shivam Kumar 3 days, 2 hours ago

Scleranchyma

ANSWER

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Posted by A Jasmitha 1 day, 1 hour ago

CBSE > Class 09 > Science

0 answers

ANSWER

What is the difference between 18g of CH4 and 18 g of CO4

Posted by Parineeti Singh 4 days, 2 hours ago

CBSE > Class 09 > Science

1 answers

Vishal Singh 2 days, 7 hours ago

No of moles in 18g of CH4 has more than CO2

ANSWER

What is air ?? Mixture or compound.

Posted by Atharva Dum 4 days, 3 hours ago

CBSE > Class 09 > Science

5 answers

Priyanshu Anand 1 day, 21 hours ago

Mixture

Vishal Singh 2 days, 7 hours ago

Mixture

Nitin Sharma 3 days, 3 hours ago

Mixture

Dnyan Khambadkar 4 days, 1 hour ago

Mixture

Rishika Rawat 4 days, 3 hours ago

Solution: Air is a mixture and not a compound because: Air does not have a formula like a mixture, while compounds have a fixed formula. When air is formed by gases, there is no energy change. Properties of air are variable and subjective to time and place.

ANSWER

State law of conservation of momentum. Give examples

Posted by Priyanka Kumari 4 days, 7 hours ago

CBSE > Class 09 > Science

4 answers

Vishal Singh 2 days, 7 hours ago

Total momentum before collision=total momentum after collision.

Dnyan Khambadkar 4 days, 1 hour ago

Mometum. Before Collision =Momentum After Collision

Rishika Rawat 4 days, 3 hours ago

An example of law of conservation of momentum is Newton's cradle, a device where, when one ball is lifted and then let go, the ball on the other end of a row of balls will push upward. ...

Naveen Sharma 4 days, 6 hours ago

Law of conservation of momentum shows that a object will remain in motion until any external force is not applied example : cradle .

ANSWER

What is mean by gravitation

Posted by Usha Suresh 4 days, 7 hours ago

CBSE > Class 09 > Science

3 answers

Abhay Dubey 1 day, 20 hours ago

There is a external force of earth called gravity

Vishal Singh 2 days, 7 hours ago

All the objects in our universe attract each other with a force of attraction called gravitation

Smrity Verma 3 days, 21 hours ago

Every object in the universe attracts every other object with a force of attraction which is known as grarvitation

ANSWER

S=ut+1/2att. By the graph and mathematical process

Posted by Nitish Kumar Nitish Kumar 6 days, 4 hours ago

CBSE > Class 09 > Science

1 answers

Mandeep Kaur 6 days, 3 hours ago

Why do we have to use the s=ut+1/2 at^2 formula? The mathematically proven equations are as follows (1) First equation of Motion: V = u + at soln. Consider a body of mass “m” having initial velocity “u”.Let after time “t” its final velocity becomes “v” due to uniform acceleration “a”. Now we know that: Acceleration = change in velocity/Time taken => Acceleration = Final velocity-Initial velocity / time taken => a = v-u /t =>at = v-u or v = u + at This is the first equation of motion. (2) Second equation of motion: s = ut + 1/2 at^2 sol. Let the distance travelled by the body be “s”. We know that Distance = Average velocity X Time Also, Average velocity = (u+v)/2 .: Distance (t) = (u+v)/2 X t …….eq.(1) Again we know that: v = u + at substituting this value of “v” in eq.(2), we get s = (u+u+at)/2 x t =>s = (2u+at)/2 X t =>s = (2ut+at^2)/2 =>s = 2ut/2 + at^2/2 or s = ut +1/2 at^2 This is the 2nd equation of motion. Hope u got it.

ANSWER

Law of conservation of momentum +verification

Posted by Nitish Kumar Nitish Kumar 6 days, 5 hours ago

CBSE > Class 09 > Science

2 answers

Rishika Rawat 4 days, 3 hours ago

For a collision occurring between object 1 and object 2 in an isolated system, the total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision. That is, the momentum lost by object 1 is equal to the momentum gained by object 2.

Yashi Choudhary 5 days, 21 hours ago

Conservation of momentum, general law of physics according to which the quantity called momentum that characterizes motion never changes in an isolated collection of objects; that is, the total momentum of a system remains constant.

ANSWER

Newton 2nd law of motion

Posted by Nitish Kumar Nitish Kumar 6 days, 5 hours ago

CBSE > Class 09 > Science

5 answers

Balkrishna Mishra 4 days, 6 hours ago

Rate of change of momentum is directly proportional to unbalanced force applied on it

Balkrishna Mishra 4 days, 5 hours ago

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

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.

Nivethitha Maheswaran 5 days, 21 hours ago

The rate of change of momentum is directly proportional to the applied unbalanced force in the direction of force

Sanket 😜 6 days, 2 hours ago

F = m × a

Saloni Sharma 21 hours ago

The applied force is directly proportional to the rate of change of linear momentum

ANSWER

Explain the modern cell theory

Posted by Pal Shah 6 days, 4 hours ago

CBSE > Class 09 > Science

2 answers

Sia 🤖 6 days, 4 hours ago

Theory that cells are the basic structural, functional, and organizational units of both single-celled and multicellular organisms; cells divide and pass on hereditary information; and energy flows within cells.

Vishal Singh 2 days, 2 hours ago

All living organisms made up of cell. Cell is structural and functional unit of life. All cells arises from pre existing cell.

ANSWER

What is the difference between seclarenchyma and collenchyma

Posted by Bismanpreet Singh 6 days, 19 hours ago

CBSE > Class 09 > Science

2 answers

Vishal Singh 2 days, 2 hours ago

The cell wall of collenchyma is composed for the deposition of extra cellulose at corner. It provide elasticity to the plant. The cell wall of sclerenchyma is made up of extra deposition of lignin at corner. It provide mechanical strength to the plant.

Alice Soreng 6 days, 8 hours ago

Collenchyma; .Consist of cell .Intercellular space is not present. .Cell tightly packed. .Deposition of pectin in cell. .Provide flexibility. Sclerenchyma; . Consist of dead cell. .Intercellular space is not present. .cell tightly packed. .Deposition of liginin in cell. . provide hardness.

ANSWER

Assertion: to every action there is an equal and opposite reaction Reason: thrust on a rocket depends upon exhaust speed of the gases Are both true??

Posted by Gagandeep Kaur 6 days, 20 hours ago

CBSE > Class 09 > Science

2 answers

Alka Darade 6 days, 11 hours ago

Answer is) Both assertion and reason are true but reason is not correct explaintion of assertion

Kumkum Sharma Kumkum Sharma 6 days, 18 hours ago

Yes

ANSWER

Flexibility in plants is due to

Posted by Satyam Singh 1 week ago

CBSE > Class 09 > Science

4 answers

D K 1 day, 7 hours ago

Collenchyma

Vishal Singh 2 days, 2 hours ago

Collenchyma

Chandana Kumari 5 days, 7 hours ago

Collenchyma

Sanchit Sharma 1 week ago

Collenchyma

ANSWER

Which one of the following will result in the formation of a mixture?

Posted by Satyam Singh 1 week ago

CBSE > Class 09 > Science

1 answers

Sia 🤖 6 days, 4 hours ago

Where are the options?

ANSWER

An athletic does not come to rest immediately after crossing the winning line due to the (a) inertia of motion (b) inertia of rest (c) inertia of direction (d) none of these

Posted by Dipika Kumari 1 week ago

CBSE > Class 09 > Science

5 answers

Vishal Singh 2 days, 1 hour ago

Inertia of motion.

Chandana Kumari 5 days, 7 hours ago

(a) inertia of motion

Ashvini Pandey 6 days, 6 hours ago

Inertia of motion

Md Zaid Ali 1 week ago

À

Dipika Kumari 1 week ago

(a) inertia of motion

ANSWER

The principle of conservation of linear momentum states that linear momentum of a system:

Posted by Ananya Kathpalia 6 days, 23 hours ago

CBSE > Class 09 > Science

1 answers

Sia 🤖 6 days, 23 hours ago

Cannot be changed

ANSWER

Is Silver bromide is a pure substance.

Posted by Anisha Choudhary 6 days, 23 hours ago

CBSE > Class 09 > Science

1 answers

Sia 🤖 6 days, 23 hours ago

silver bromide is a pure substance because it is made up of silver and bromine and free from another kind of mixtures.

ANSWER

Activities 11.1ch11

Posted by Aayu Agastya 1 week ago

CBSE > Class 09 > Science

0 answers

ANSWER

calculate the mass of sodium sulphate required to prepare its 20% ( mass percent ) solution in 100 g of water ?

Posted by Praveen Bhargav 1 week ago

CBSE > Class 09 > Science

1 answers

Sia 🤖 1 week ago

Let the mass of sodium sulphate required be 'x' g
The mass of water = 100 g
The mass of solution =(mass of sodium sulphate + mass of water) = (x + 100)g
Percentage of sodium sulphate in solution {tex}=\;\frac{Mass\;of\;sodium\;sulphate}{Mass\;of\;solution}\times100{/tex}
{tex}20=\frac{x}{x+100} \times 100{/tex}
20x + 2000 = 100x
80x = 2000
x = {tex}\frac{2000}{80}{/tex}
= 25 g
Therefore, the mass of sodium sulphate required is 25 g.

ANSWER

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