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Friction force is a force that slow down things or prevent from moving.This force acts between two objects.Friction force acts more in rough surface and less in smooth surface.

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Vinit Kumar Dubey 5 years, 11 months ago

It is a type of force which acts between the surface of the two object. Without this force it is nearly impossible to move

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An object of mass 50 kg is accelerated uniformly from a velocity e 20 metre per second to 25 metre per second in in 10 second calculate the u and v of the object also find the magnitude of the force

Posted by Sonu Kumar 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Namrata Jindal 5 years, 11 months ago

u = 20m/s v = 25m/s a = (v-u)/t =(25-20)/10 =5/10 =0.5 Force = Mass * a = 50 * 0.5 = 25 N

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An object of mass 50 kg is accelerated uniformly from a velocity of 20 metre per second to 25 metre per second in 10 second calculate the u and v of the object also find the magnitude of the force

Posted by Sonu Kumar 5 years, 11 months ago

CBSE > Class 09 > Science

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Accompound is regarded as a pure substance while a mixture is not give reason

Posted by Shashti Kapgate 5 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Vinit Kumar Dubey 5 years, 11 months ago

A mixture doesn't have uniformly distributed particles but a compound has uniformly distributed particles

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Rashi Kumawat 5 years, 11 months ago

In mixture, there are two or more than two things are mixed or dissolved

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If ep is 588 j h is 8m g is 9.8 find m

Posted by Umang Shukla 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Vinit Kumar Dubey 5 years, 11 months ago

M=588j/8m*9.8=7.5

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Why the earth does not change it's path

Posted by Ansh Mishra 5 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Renjith Mr 5 years, 11 months ago

Due to centripetal force

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Vahan Be There 5 years, 11 months ago

Because of cetripetal and centrifugal force

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Chapter14notes

Posted by Naresh Bhati 5 years, 11 months ago

CBSE > Class 09 > Science

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describe the water cycle in detail

Posted by Alok Saxena 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Alok Saxena 5 years, 11 months ago

describe the water cycle in detail

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How can we find the mass number of an atom

Posted by Harini Maheswari 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Laxman Yadav 5 years, 11 months ago

We can find mass nunber by adding the number of proton and neutron of an element

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Why hydrogen do not have any neutrons?

Posted by Aryan Arya 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Vinit Kumar Dubey 5 years, 11 months ago

Because it has only one proton in the center so ther is no need of a neutron

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How many moles are there in 76.8g of copper

Posted by Kissu Gupta 5 years, 11 months ago

CBSE > Class 09 > Science

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What is second law of motion ?explain mathmaically that(f=ma)

Posted by Tensingh Vijauriya 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Lux Man 5 years, 11 months ago

The rate of change of momentum of an object is proportional to applied force. F=ma

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Explain archemedies principal?with help of daigram.

Posted by Tensingh Vijauriya 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Tensingh Vijauriya 5 years, 8 months ago

Hw6eutHzO5ene7tSsKEUirct

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when sugar obtained from sugarcane and beetroot are mixed together will it be a mixture or pure substance? Explain.

Posted by Asmita Belapurkar 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Namrata Jindal 5 years, 11 months ago

Mixture

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What is law of constant prapotion

Posted by Aman Kumar 5 years, 11 months ago

CBSE > Class 09 > Science

4 answers

Vinesha Nair 5 years, 11 months ago

In a chemical substance the elements are always present in a definite proportion by mass

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Priyanshu Jha 5 years, 11 months ago

Every thing is matter

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Priyanshu Jha 5 years, 11 months ago

Glat hai

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Khushi Jain 5 years, 11 months ago

Atoms of an element always combine in a fixed proportion by mass..

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What is colloidal solution?

Posted by Shubh Patel 5 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Ujjawal Verma 5 years, 11 months ago

Colloidal solutions are heterogeneous mixture in which the particles size is too small to be seen with naked eyes . The particles of colloids are uniformly spread throughout the solution.

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Harshit R 5 years, 11 months ago

Colloid

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Write an experiment to suggedt that the fluid also exert a presaure

Posted by Prakash Kumar 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Meghna Thapar 5 years, 7 months ago

All the liquids exert pressure on the base and the walls of their containers. The pressure exerted by a liquid increases with increasing depth inside the liquid.

If we take a transparent glass tube or a plastic pipe of length about 15 cm and its diameter should be 5-7.5 cm. Also take a rubber balloon and stretch it tightly over one end of the pipe. Hold the pipe at the middle, keeping it in vertical position, pour some into it. We find that the rubber balloon stretches and bulges out which demonstrates that the water poured in the pipe exerts a pressure on the bottom of its container. Now, if we pour some more water in the plastic pipe that its water column increases, the bulge of the rubber balloon also increases, showing that the pressure of water on the bottom of its container has increased.

This shows that:

A liquid exerts pressure on the bottom of its container.
The pressure exerted by a liquid depends on the height of the liquid column.

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What is mean by cell diffiriscet

Posted by Gaurav Thombre 5 years, 11 months ago

CBSE > Class 09 > Science

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Define SER

Posted by Krishna Solanki 5 years, 11 months ago

CBSE > Class 09 > Science

4 answers

Shekhar Thakur 5 years, 11 months ago

Smooth endoplasmic reticilum is a site of proteins and lipids

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Shubh Patel 5 years, 11 months ago

Smooth endoplasmic reticulum

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Srishti Kumari 5 years, 11 months ago

It is smooth endoplasmic reticulum type of endoplasmic reticulum and it is made up of protein and lipid.

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Sanavi Choudhary 5 years, 11 months ago

Smooth endoplasmic reticulum which makes protein used in making plasmamembrane

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What is Ser define

Posted by Krishna Solanki 5 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Sam Khan Khan 5 years, 11 months ago

Jjhhhjjj

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Khushi Jain 5 years, 11 months ago

Smooth endoplasmic reticulum....it help in synthesis of lipids and protiens...they are soft because they donot bear ribosomes on their body

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How we start to take snoring when we sleep?

Posted by Shaili Shree 5 years, 11 months ago

CBSE > Class 09 > Science

2 answers

Jhalakdeo Kumar 5 years, 11 months ago

Due to roughness of cheek

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Jhalakdeo Kumar 5 years, 11 months ago

Due to roughness of cheek

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In an experiment to establish the relationship between weight of a wooden cuboid with face A of area 2 30 20 × m , face B of area 2 20 10 × m and face C of area 2 30 10 × m lying on the horizontal surface and the minimum force required to move it, which of the three faces of cuboid should be in contact with the surface?

Posted by Gaurav Thombre 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Jyoti Sonune 5 years, 11 months ago

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What is adsorption?

Posted by Rajesh Deval 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 5 years, 11 months ago

Adsorption is defined as the deposition of molecular species onto the surface.

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How is the ER important for membrane biogenesis

Posted by Asifa Naaz 5 years, 11 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 5 years, 11 months ago

It helps in manufacturing of lipids and fat molecules. Endoplasmic reticulum synthesizes lipids (smooth endoplasmic reticulum) and proteins (rough endoplasmic reticulum) which are responsible for formation of membrane. Thus, they help in membrane biogenesis.

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Nuclei of atoms is which type of energy give their name .

Posted by Rahul Dangi 5 years, 11 months ago

CBSE > Class 09 > Science