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Balanced forces do not result in any change in motion. Unbalanced forces: forces applied to an object in opposite directions that are not equal in size. Unbalanced forces result in a change in motion. Friction: the force that opposes the motion or tendency toward motion of two objects that are in contact.

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Nikita Soni 3 years ago

Balanced forces do not result in any change in motion. unbalanced. forces: forces applied to an object in opposite directions that are not equal in size. Unbalanced forces result in a change in motion. friction: the force that opposes the motion or tendency toward motion of two objects that are in contact.

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Abin Anto Benny 3 years ago

At 0 force both balanced and unbalanced forces are equale

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Pranay R 3 years ago

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Praveen Kumar 3 years ago

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What are polyatomic elements and polyatomic ions

Posted by Chetan Katara 3 years ago

CBSE > Class 09 > Science

1 answers

Isha 1260 3 years ago

The elements that have more than two atoms bonded by a covalent bond are referred to as polyatomic elements. Ex- P4,S8,ClO2 Polyatomic ions are ions which consist of more than one atom. For example, nitrate ion, NO3-, contains one nitrogen atom and three oxygen atoms.

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Speed and velocity are same

Posted by Shaikh Insha Ashhad 3 years ago

CBSE > Class 09 > Science

5 answers

Aditya Sharma 3 years ago

Speed is scalar quantity but velocity is vector quantity

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Deepak Saini 3 years ago

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Abhishek Pandit 3 years ago

I am not happy

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Yogesh Sain 3 years ago

Yes they are same but speed is scalar quantity and velocity is vector quantity.

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Shruti Kumari 3 years ago

True

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Why mitochondria have folds

Posted by Ravi Sharma 3 years ago

CBSE > Class 09 > Science

2 answers

Pranay R 3 years ago

Increase the surface area for ato molecules to work

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Akshiti Dugar 3 years ago

It provides increased surface area for synthesis of ATP molecules.

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What is the definition of inertiya

Posted by Sandeep Kumar 3 years ago

CBSE > Class 09 > Science

4 answers

Nikita Soni 3 years ago

It is that property of body due to which it resist a change in its state of rest and motion. Larger will be mass. Larger will be the inertia

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Abin Anto Benny 3 years ago

I think you mean inertia - inertia the object will countinue to be in rest or uniform motion

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Pranay R 3 years ago

A tendency of a body to resist motion in rest or in uniform motion in straight line until acted upon by some external force

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Yogesh Sain 3 years ago

a property of matter by which it remains at rest or in uniform motion in the same straight line unless acted upon by some external force

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What is the physical state of 100 degree Celsius

Posted by Shivang Tiwari 3 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Shruti Kumari 3 years ago

Both in liquid as water and gas as steam

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Deepak Kumar Paswan 3 years ago

Gas

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Raja Mondal 3 years ago

Liquid

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Sonam Rani 3 years ago

Either liquid or vapour

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Tushar Singh 3 years ago

Both liquid state and gaseous state

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A bus starting from rest moves with a uniform acceleration of 0.1ms-2 for 2 minute find the speed acqcired

Posted by Basu Jha 3 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Pragyansh Sharma 3 years ago

u=0m/s a=0.1m/s² t=2min=120sec By formula of acceleration a=v-u/t 0.1=v-0/120 0.1*120=v-0 ( the star symbol means multiply). 12=v v=12m/s

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Ujjwal Kumar 3 years, 1 month ago

u=0. (bus initially was at rest) a=0.1m/s² t=2 mins =120 sec. v=? According to 1st equation of motion........ v=u+at =0+0.1×120 =12m/s

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Ujjwal Kumar 3 years, 1 month ago

12m/s

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Find the force when mass has 13 kg and acceleration has 12 m/s²

Posted by Tanishka Tyagi 3 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Pranay R 3 years ago

156 N

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Ravi Sharma 3 years ago

156N

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Pragyansh Sharma 3 years ago

The less the surface area the more the pressure.That is why thin strap means less area thus more pressure and it is difficult to hang it.

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Ujjwal Kumar 3 years, 1 month ago

m=13kg a=12m/s² F=ma =13×12 =156N

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Manisha Devi 3 years, 1 month ago

why is it difficult to hold a school bag having a strap made of a thin and strong string

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Weeds

Posted by Dhanammagari Lakshmi Chaithanya Kumar 3 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Shruti Kumari 3 years ago

Weeds are unwanted plant which grow with the main crops. they take up space and nutrients

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Dhanammagari Lakshmi Chaithanya Kumar 3 years, 1 month ago

The person who answer the question was intelligent

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What is ploughing

Posted by Dhanammagari Lakshmi Chaithanya Kumar 3 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Shruti Kumari 3 years ago

The loosening and turning of a few inches of the top soil is known as ploughing

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Nishant Choudhary 3 years ago

Ploughing means when we plough our field with the help of tractors by spreading the seeds the process of spreading seeds with the helps of Machine like tractors,etc.

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Dhanammagari Lakshmi Chaithanya Kumar 3 years, 1 month ago

The person who answer the question was intelligent

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Velocity is equal to average velocity?

Posted by Swarnima Dixit S.D 3 years, 1 month ago

CBSE > Class 09 > Science