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What is the need of sustainable practices in agriculture and animal husbandry?Explain.

Posted by Abhi Kumar 1 year, 8 months ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 1 year, 8 months ago

Agriculture and the animal husbandry are very important economical sectors in any country.That's why we have to take several measures to develop these sectors. We should apply sustainable method in these sectors to maintain the proper preservation of the natural resources for these sectors need for our future generation. If we ruthlessly expand these sectors the natural resources will be depleted soon. That's why sustainable practices are becoming very important nowadays in the agriculture and animal husbandry.

ANSWER

How your social health affects your personal hygiene? Explain.

Posted by Abhi Kumar 1 year, 8 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Notes of force and law of motion

Posted by Raj Dixit 1 year, 8 months ago

CBSE > Class 09 > Science

1 answers

Aakriti Gupta 1 year, 8 months ago

A body push or pull is called force There are 3types of force

ANSWER

What is the Latin name of Iron

Posted by Anushka Rajput 1 year, 8 months ago

CBSE > Class 09 > Science

5 answers

Saumya Gaur 1 year, 8 months ago

Ferrum

Sushamita Singh 1 year, 8 months ago

Ferrum

Sushamita Singh 1 year, 8 months ago

Ferrim

Abhi Kumar 1 year, 8 months ago

Ferrum

Rallo Anjali 1 year, 8 months ago

Ferrum

ANSWER

If we are having a periods ,at that time we can do *** yes or no ?Explain why?

Posted by A.R.L Chaudhary 1 year, 8 months ago

CBSE > Class 09 > Science

4 answers

Tapashya Sharma 1 year, 7 months ago

no

A.R.L Chaudhary 1 year, 8 months ago

Yes we can do it , it is normal

A.R.L Chaudhary 1 year, 8 months ago

Why

Prince Chaudhary 1 year, 8 months ago

No

ANSWER

Which organelle is called "Powerhouses of the cell"?

Posted by Abhi Kumar 1 year, 8 months ago

CBSE > Class 09 > Science

5 answers

Saumya Gaur 1 year, 8 months ago

Mitochondria

Shreya Pandey 1 year, 8 months ago

Mitochondria

Sushamita Singh 1 year, 8 months ago

Mitochondria, which gives energy in the form of ATP (Adenosine Triphosphate),

Rallo Anjali 1 year, 8 months ago

Mitochondria

Nirupama Varma P. K 1 year, 8 months ago

Mitochondria, Because it helps in generating energy for the cell.

ANSWER

Write briefly on 1. Isotopes 2. Isobars 3. Isotones

Posted by Smriti Gupta 1 year, 8 months ago

CBSE > Class 09 > Science

2 answers

Smriti Gupta 1 year, 7 months ago

Isotones have different mass no.and different atomic no. but same no. of neutrons

__ Shashwat__ 1 year, 7 months ago

Isotopes have different atomic mass but have same atomic number and isobars have save mass number but have different atomic number

ANSWER

What happened when slank a piece of cloth

Posted by Ali Talib 1 year, 8 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Phosphorus atomic number And atomic mass

Posted by Swati Yadav 1 year, 8 months ago

CBSE > Class 09 > Science

5 answers

Pawan Pandey 1 year, 8 months ago

Atomic no. 15 and Atomic mass 31

Pawan Pandey 1 year, 8 months ago

Atomic no. 15 and Atomic mass 31

Smriti Gupta 1 year, 8 months ago

Atomic no. 15 Atomic mass 31

Ayush Katheriya 1 year, 8 months ago

Atomic no. 15

Shriraj Shriraj 1 year, 8 months ago

Madarchod

ANSWER

A sound has 13 crests and 15 troughs in 3 seconds. When the second crest is produced the first is 2cm away from the source? Calculate a. The wavelength c. The wave speed b. The frequency

Posted by Kanha Gupta 1 year, 8 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

What is the work done by the force of gravity on a satellite moving round the earth? justify your answer

Posted by Mohit Mehmi 1 year, 8 months ago

CBSE > Class 09 > Science

2 answers

Preeti Dabral 1 year, 8 months ago

When a satellite moves around the Earth in a circular path, then the force of gravity acts on it directed towards the centre. The motion of the satellite is in the horizontal plane. Therefore, the force of gravity of Earth on the satellite and the direction of motion of satellite are perpendicular to each other. Therefore, net work done = Fs cos 900 = 0. That is, the work done by the force of gravity on a satellite moving around the Earth is zero.

Vaibhav Verma 1 year, 8 months ago

Work done would be 0 Since, satellite orbits earths in a circular path and from every point earth's radius to satellite is always perpendicular. Also, Since, work done Perpendicularly = Fd cos theeta. (Ø)Where cos theeta (ø) =90°= 0 Henceforth work done = 0 J

ANSWER

What is the frequency of sound of wavelength 50cm?

Posted by Lakshita Arora 1 year, 8 months ago

CBSE > Class 09 > Science

3 answers

Swati Yadav 1 year, 8 months ago

Lambda 50 cm and frequency 5kHz

Anand Chaudhary 1 year, 8 months ago

Show the times of animal tissue using flow chart

Rajkumari Patidar 1 year, 8 months ago

A sound wave has frequency of 5kHz and wavelength 50 cm.

ANSWER

What is sound and how it is produced?

Posted by Sarthak Mittal 1 year, 8 months ago

CBSE > Class 09 > Science

3 answers

Dipti Suryawanshi 1 year, 8 months ago

Sound is a form of energy which creates distubance. Sound is produced and propogated through vibrations. Vibration plays a important role in propogation and production of sound

Daksh Gupta 1 year, 8 months ago

Sound is a form of energy which produces sensation of hearing in our ears. Sound is produced through vibrations caused by vibrating objects

Om Tulsyan 1 year, 8 months ago

It is a type of energy which produces when an object vibrates.

ANSWER

Mahesh moving on a road with a uniform acceleration covers 20 m/s in one second and 40 m in 2 second . what is the acceleration?

Posted by Abhijeet Sharma 1 year, 8 months ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 1 year, 8 months ago

distance travelled in 1st second=20m

time taken to travel this distance=1s

So speed in first second is dist/time = 20m/s

Similarly speed in 2nd second is 40m/s

Now acceleration = dv/dt

Here dv means change in v, where v is velocity and dt means change in t where t is time interval.

Change in velocity = final vel. — initial vel.

That is, 40-20 = 20m/s

And change in time = 2 — 1 = 1s

So acceleration is 20m/s / 1s = 20m/s^2 Ans.

Metre per second square is the standard unit of acceleration.

ANSWER

Why are cells called structural and basic unit of life ?

Posted by Nishit Agarwal 1 year, 8 months ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 1 year, 8 months ago

Living cells have certain specific components within it known as cell organelles. Each kind of cell organelle performs a specific function, such as making new materials in the cells, release of waste, transportation, etc. Thus, a cell can perform all its functions with the help of these organelles. That is why the cells are called structural and functional unit of life.

ANSWER

How endoplasmic reticullam and golgi body are interconnected to each other?

Posted by Nimish Srivastava 1 year, 8 months ago

CBSE > Class 09 > Science

2 answers

Preeti Dabral 1 year, 8 months ago

A protein called coat protein II (COPII; green) forms vesicles that transport from the endoplasmic reticulum (ER) to the Golgi. A different protein called coat protein I (COPI; red) forms vesicles for transport in the other direction, from the Golgi to the ER. COPI also forms vesicles for intra-Golgi transport.

Prince Panday 1 year, 8 months ago

Hii

ANSWER

Can we make viruses from DNA 🧬. HOW?

Posted by Shakur Ansari 1 year, 8 months ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 1 year, 8 months ago

The virulent nucleic acid sequence hijacks the cellular machinery to self-replicate, lyse the cell, spread, and infect other cells. Using reverse genetics, the sequence of a viral genome can be identified, including that of its different strains and variants.

ANSWER

Write formula for average power

Posted by Roddy Wrangler 1 year, 9 months ago

CBSE > Class 09 > Science

5 answers

Smriti Gupta 1 year, 8 months ago

W/t

Shreya Shandilya 1 year, 8 months ago

Total work done /total time taken

Kahan Kalsariya 1 year, 8 months ago

W/t

R.Preety Ramaesh 1 year, 9 months ago

W/t

Prarthana Sajayan 1 year, 9 months ago

Average power = w/t

ANSWER

What are macronutrients and why are they called macronutrients

Posted by Bitu Kumar 1 year, 9 months ago

CBSE > Class 09 > Science

2 answers

Nimish Srivastava 1 year, 8 months ago

The nutrients which are needed by the plants in more quantity are known as macronutrients. The plant get these nutrients from soil.

Prarthana Sajayan 1 year, 9 months ago

Some of the nutrients for plants are required in large quantity called the macro-nutrients.As by it's meaning macro means large therefore it is called macro-nutrients.

ANSWER

What is the main function of mitochondria

Posted by K. Tushar 1 year, 9 months ago

CBSE > Class 09 > Science

5 answers

Nimish Srivastava 1 year, 8 months ago

The mitochondria is generally known as the power house of the cell. It is a semi-autonomous organelle which have their own DNA and ribosomes therefore it can synthesize some proteins on their own. It synthesize ATP(Adinoscene triphisphate) which is also known as the energy currency of the cell. It is a double membrane bound cell oraganelle in which external membrane is porous and the internal membrane is deeply folded which increase the surface for ATP production.

Shreya Rai 1 year, 8 months ago

They are semi- autonomous organelle they divide themself. They are double membrane. Have their own DNA. They produce energy using cellular respiration

Kahan Kalsariya 1 year, 8 months ago

This power house of the cell

Harsh Kumar 1 year, 9 months ago

To produce energy

Aryan Patoliya 1 year, 9 months ago

2 equation of motion

ANSWER

A 0.24g sample of compound of oxygen and boron was found by anallysis to contain 0.096g of boron and 0.144 g of oxygen. Calculate the percentage composition of the compound by weight

Posted by Hasya Savaya 1 year, 9 months ago

CBSE > Class 09 > Science

2 answers

Manoj Lohia 1 year, 8 months ago

Sample of compound= 0.24 gram Sample of Boron =0.096 g Sample of oxygen =0.144 gram Percentage of Boron =0.096/ 0.24* 100 = 40% Percentage of oxygen= 0.144/ 0.24* 100 = 60%

K. Tushar 1 year, 9 months ago

No no

ANSWER

How was neutron discovered ?

Posted by Jasnoor Saini 1 year, 9 months ago

CBSE > Class 09 > Science

5 answers

Shreya Shandilya 1 year, 8 months ago

James Chedwik was discovered it but How it is writeen on his exp.

Kahan Kalsariya 1 year, 8 months ago

James chedwick

Raunak Yadav 1 year, 9 months ago

James Chadwik

Kunal Rajput 1 year, 9 months ago

J chadwick

Meenakshi Dasila 1 year, 9 months ago

J.chandwik

ANSWER

If the displacement of an object is proportional to square of time then the object moves with

Posted by Chitralekha Bhati 1 year, 9 months ago

CBSE > Class 09 > Science

1 answers

Barsha Deb 1 year, 8 months ago

Uniformly accelerated motion

ANSWER

Reflection of sound

Posted by Anand Chaudhary 1 year, 9 months ago

CBSE > Class 09 > Science

2 answers

Devika Prajapati 1 year, 8 months ago

The bouncing back of the sound when it strike with a hard surface is called reflection of the sound

Arshpreet Kaur 1 year, 9 months ago

Answer :– Reflection is a phenomenon of reversion of a wave going from one medium to the same medium after striking the second medium. Sound wave also experience reflection like other waves.

ANSWER

Mass of proton is ________ times the mass of an electron

Posted by Neha Srinitya Banoth 1 year, 9 months ago

CBSE > Class 09 > Science

5 answers

Preeti Dabral 1 year, 9 months ago

1836

Smriti Gupta 1 year, 8 months ago

1840

Nimish Srivastava 1 year, 8 months ago

2000 times

Roshni Roshni 1 year, 9 months ago

2000

Prerna Pawar 1 year, 9 months ago

1836

ANSWER

What ix homogeneous

Posted by Anshika Yadav 1 year, 9 months ago

CBSE > Class 09 > Science

5 answers

Raunak Yadav 1 year, 9 months ago

Hio

Kunal Rajput 1 year, 9 months ago

When two substance are uniformly mix

Roshni Roshni 1 year, 9 months ago

When two or more component that just mix together uniformly without any separation boundary with call homogeneus mixture

Shivam Gupta 1 year, 9 months ago

In this type of mixture properties are the same in every portion. Example - cement , milk, e.t.c

Shivam Gupta 1 year, 9 months ago

Hi

ANSWER

List out the postulates of Thomson atomic model

Posted by Sarnika .M 1 year, 9 months ago

CBSE > Class 09 > Science

1 answers

Barsha Deb 1 year, 8 months ago

According to the postulates of Thomson's atomic model, an atom resembles a sphere of positive charge with electrons (negatively charged particles) present inside the sphere. The positive and negative charge is equal in magnitude and therefore an atom has no charge as a whole and is electrically neutral.

ANSWER

Exam me important questions konse hoge

Posted by Mahi Tauk 1 year, 9 months ago

CBSE > Class 09 > Science

3 answers

Shreya Shandilya 1 year, 8 months ago

Question mujhe pata aap khud pe confidence rakhiye

Kunal Rajput 1 year, 9 months ago

Land bta ve

Jassika Goel 1 year, 9 months ago

Hamko kya pta

ANSWER

What type of project we can make on food security?

Posted by Pushpanjali 😗 1 year, 9 months ago

CBSE > Class 09 > Science

1 answers

Ravinder Singh 1 year, 9 months ago

Ration shops

ANSWER

Define pure and impure substances

Posted by Sandeep Yadav 1 year, 9 months ago

CBSE > Class 09 > Science

4 answers

Piyush Singh 1 year, 9 months ago

Pure substance is the made up of only one kind of particles

Saurabh Yadav 1 year, 9 months ago

Mixture is a kind of substance in which two or more than different kind of atom or particle present in it

Saurabh Yadav 1 year, 9 months ago

Impure substance means mixtures

Saurabh Yadav 1 year, 9 months ago

Pure substance is a kind of substance in which only one kind of particles present in it

ANSWER

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