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A force of 10N acting on a body at an angle of 60 degree wit h the horizontal direction displaces the body through a distance of 2m along the surface of a floor.Calculate the work done.now let the force or pull acting on the body makes an angle

Posted by Hrishikesh Kotian 7 years, 1 month ago

CBSE > Class 09 > Science

0 answers

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Tell me something about Phylum coelenterata

Posted by Hrishikesh Kotian 7 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Richa Singh☺️ 7 years, 1 month ago

These animals have the marine habitat Presence of body cavity Asexual reproduction Presence of tentacles Nutrition is holozoic i.e they ingulf food through mouth Examples:hydra, jelly fish and sea anemones

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Utkarsh Kushwaha 7 years, 1 month ago

They are radical symmetrical

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Hrishikesh Kotian 7 years, 1 month ago

Thank you for your help arthi

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Arti Singh 7 years, 1 month ago

Cylendrical body

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How AIDS are spread

Posted by Mohit Talmale 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Pramita Chopra 7 years, 1 month ago

AIDS is spread by :-- Used syringes ; Blood transfusion ; Sexual contact and mother to unborne child .

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What is catanation

Posted by Rohan Yadav 7 years, 1 month ago

CBSE > Class 09 > Science

0 answers

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What are the functions of lignin and suberin?

Posted by Bhuvi Shetty 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Mohit Talmale 7 years, 1 month ago

The walls of screnchyma are thickend due to lignin & sberin is used to stain plantcell

2Thank You

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What is the chemical formula of water?

Posted by Amazing Videos 7 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Richa Singh☺️ 7 years, 1 month ago

H2o, where 2atoms of hydrogen and one atom of oxygen is present

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Arti Singh 7 years, 1 month ago

H2o

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Lavanya Sondhi 7 years, 1 month ago

H2O

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Differnce between speed and velocity

Posted by Mayank Chauhan 7 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Anup Dani 7 years, 1 month ago

Speed is distance travelled by an object is called as speed. And velocity is distance travelled by object per unit time in a given direction is known as velocity.

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Harsh Sanwal 7 years, 1 month ago

Speed is scaler .Velocity is vector. Speed is eqaul to distance/time.vilocity is equal to diplacement/time.speed si unit is....

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Abhyanand 7 years, 1 month ago

Speed have only magnitude and velocity have both magnitude and direction

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Derive a formula of kinetic energy

Posted by Mayank Chauhan 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Anup Dani 7 years, 1 month ago

Kinetic energy = 1/2 mv²

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Khushvant Chouhan 7 years, 1 month ago

1/2mv²

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What is a mixture

Posted by Azlan Khan 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Harsh Sanwal 7 years, 1 month ago

Any substance having more than 2 compOund is called so

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What is sloution

Posted by Nishant Shukla 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Bhuvi Shetty 7 years, 1 month ago

A solution is a homogeneous mixture of two or more substances.

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Which of the following is green gas

Posted by Anshu Devda 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Hrishikesh Kotian 7 years, 1 month ago

Carbon di oxide,Methane etc are the green gas

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Easy method to learn nitrogen Cycle

Posted by Kawdu Tikle 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Hrishikesh Kotian 7 years, 1 month ago

Just recol the diagram of nitrogen cycle.further you can write easily by recoling.

1Thank You

Khushvant Chouhan 7 years, 1 month ago

By helping of book

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to the last character on current screen

Posted by Mansi Meena 7 years, 1 month ago

CBSE > Class 09 > Science

0 answers

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What is the kingdom of animalia

Posted by Mukesh Gond 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 7 years, 1 month ago

The animal kingdom is classified into different phyla.
1. Porifera: These animals have pores all over their body. The pores lead into the canal system. Water flows through the canal system and facilitates entry of food and exchange of other materials. The animal is not differentiated into tissues. The body is covered with a hard outer skeleton. These are commonly known as sponges. They are marine animals. Examples: Sycon, spongilla, euplectelea, etc.
2. Coelenterata: The body is made up of a coelom (cavity) with a single opening. The body wall is made up of two layers of cells (diploblastic). Some of the species live a solitary life while others live in colonies. Examples: Hydra, Jelly fish, Sea anemone, etc.
3. Platyhelminthes: The body is flattened from top to bottom and hence the name platyhelminthes. These are commonly known as flatworms. The body wall is composed of three layers of cells (triploblastic). Because of three layers, it is possible to form some organs as well. But a proper ceolom is absent in platyhelminthes and hence proper organs are absent. They are free-living or parasitic animals. Examples: Planaria, liver fluke, tapeworm, etc.
4. Nematohelminthes: The body is bilaterally symmetric and there are three layers in the body wall. Animals are cylindrical in shape. A pseudocoelom is present and hence organs are absent. Examples: Roundworms, pinworms, filarial parasite (Wuchereria), etc.
5. Annelida: True body cavity is present in these animals. The body is divided into segments and hence the name annelida. Each segment is lined one after another and contains a set of organs. Examples: Earthworm, leech, etc.
6. Arthropoda: Animals have jointed appendages which gives the name arthropoda. Exoskeleton is present which is made of chitin. This is the largest group of animals; in terms of number of species. Circulatory system is open, which means blood flows in the coelomic cavity. Examples: cockroach, housefly, spider, prawn, scorpion, etc.
7. Mollusca: The animal has soft body; which is enclosed in a hard shell. The shell is made of calcium carbonate. Circulatory system is open and kidney like organ is present for excretion. The body has well developed muscular feet for locomotion. Examples: Snail, mussels, octopus, etc.

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Write a method to seprate different gases of air

Posted by Amit Verma 7 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Richa Singh☺️ 7 years, 1 month ago

Liquidifaction(by applying pressure and temperature)

1Thank You

Niketan Mehta 7 years, 1 month ago

By pressing them

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Khiladi Bhai 7 years, 1 month ago

By gas chamber

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Itishree Panda 7 years, 1 month ago

Air is a homogeneous mixture and can be separated into its components by fractional distillation

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A stone is dropped from a height of 100m and other stone is thrown up simultaneously with a speed of 25 m/s. After the what time the two stones will meet with each other?

Posted by Hritik Giri 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Hritik Giri 7 years, 1 month ago

I want sum

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Raj Raunak 7 years, 1 month ago

At 21.6m

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State

Posted by Arjun Kumar 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Hrishikesh Kotian 7 years, 1 month ago

I didn't understand your question

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2.Whichpartoftheplantcellpermitsittowithstandverydiluteexternalmediumwithout bursting?

Posted by Hridaya Raj 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Aayush Chandak 7 years, 1 month ago

Cell wall

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Someome plz tell important questions of ch force and law of motion

Posted by Anil Kumar 7 years, 1 month ago

CBSE > Class 09 > Science

0 answers

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What is meristematic tissue and permanent tissue

Posted by Shivam Rai 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Golu Kumar 7 years, 1 month ago

meristematic has ability of division . permanent tissue can't divide.

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What is the types connective tissue

Posted by Shivam Rai 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Golu Kumar 7 years, 1 month ago

Four--- 1.bone 2.cartilage 3.blood 4.lymph

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Justify"dust is a pollution".

Posted by Tina Kalwadia 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Golu Kumar 7 years, 1 month ago

Dust is a pollution.It can be justify by following reasons- 1.It makes difficult to breathe. 2.It has bad smell which irritate us. 3.It has poisonous components which is not good for our health. 4.It also generates irrigation in our eyes which leads many eyes defects.

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Why solids have fixed shape but liquids and gases do not have fixed shape

Posted by Yashraj Dawira 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Sayoni Debnath 7 years, 1 month ago

Because the intermolecular force of attraction is highest in solids and the intermolecular spaces are least in them. So solids having highest density among all other states of matter, have a fixed shape .

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Rohit Das 7 years, 1 month ago

It is because solid have very high density as liquids and gases...

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What is the speed of sound in liquids

Posted by Sarthak Sharma 7 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Rohit Das 7 years, 1 month ago

The speed of sound in liquid is 1498 m/s ( at 20°C )

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Arya Yadav 7 years, 1 month ago

In solids its 5130m/sec In air its 334m/sec

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Arya Yadav 7 years, 1 month ago

1498m/sec

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Explain green house effects

Posted by Shivam Rai 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Arya Yadav 7 years, 1 month ago

In othr wrds==The greenhouse effect is The exchange of incoming and outgoing radiation that warms the Earth is often referred to as the greenhouse effect because a greenhouse works in much the same way.

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Arya Yadav 7 years, 1 month ago

The greenhouse effect is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere.

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How minerals riches in the soil?

Posted by Shivam Rai 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Arya Yadav 7 years, 1 month ago

Soil rich in minerals:- Minerals are formed through natural geological processes that take place over long periods of time. Minerals such as calcium, chromium, copper, iodine, iron, selenium and zinc are important to maintain health. They are known as "trace minerals" or "micronutrients." Minerals are absorbed from soil into vegetable and fruit root systems to become part of the nutritional content of food. Average soil contains 45 percent minerals, according to a U.S. Environmental Protection Agency report on soil.

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How does atmosphere act as a blanket

Posted by Shivam Rai 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Richa Singh☺️ 7 years, 1 month ago

By protecting us from the harmful uv rays

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What is the quality of sound?

Posted by Shivam Rai 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Arya Yadav 7 years, 1 month ago

Either sound is musical or noisy is its quality

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Plzz give me detail about disease measles....

Posted by Arya Yadav 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Pramita Chopra 7 years, 1 month ago

Measles is also known as red measles. It is a highly contagious respiratory infection caused by a virus which causes a rash all over the body. Measles could be spread through infected mucus and saliva.Measles is the primary disease that leads to the death of children. Symptoms generally appear within 14 days General symptom of the measles is body rash but before that, there are few more symptoms which could help to detect measles. Fever Hacking cough Red eyes Muscle pains Running nose Sore throat etc..

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Arya Yadav 7 years, 1 month ago

Is thete no one fr hlp...

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Is cell wall is available in animal cell

Posted by Armaan Narang 7 years, 1 month ago

CBSE > Class 09 > Science