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Explain Force is a vector quantity

Posted by Ishita Singh 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Force is a vector quantity because it depends on both magnitude as well as direction.

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Can u guys define keplers law

Posted by Keerthana Keeru 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Joyeta Mondal 6 years, 10 months ago

Image result for keplers law Image result for keplers law Image result for keplers law Image result for keplers law Image result for keplers law Image result for keplers law Image result for keplers law Image result for keplers law Image result for keplers law Image result for keplers law Image result for keplers law View all In astronomy, Kepler's laws of planetary motion are three scientific laws describing the motion of planets around the Sun. The orbit of a planet is an ellipse with the Sun at one of the two foci. A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time. Wikipedia

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In a winter season Sanjay was heating water in a bucket using and invention brown is so his nephew going to put his hand in the bucket of water arrest and stop this nephew from doing such an accident what value do you learn from Sanjay

Posted by Aditya Sharma 2 years, 11 months ago

CBSE > Class 08 > Science

0 answers

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Can sugar solution conduct electricity

Posted by Prithvi Gowda C 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Arjun Rai 6 years, 10 months ago

When sugar is dissolved in water, the solution does not conduct electricity, because there are no ions in the solution. Some substances that are made of molecules form solutions that do conduct electricity. Ammonia is such a substance. When ammonia dissolves in water, it reacts with the water and forms a few ions.

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Why forest is called green lungs

Posted by Ratnesh Kumar 6 years, 10 months ago

CBSE > Class 08 > Science

3 answers

Mithali Pattanaik 6 years, 10 months ago

Lungs help us to breath that how trees give us oxygen which is essential for living.And trees r green so they r called so

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Rudra Sen Singh 6 years, 10 months ago

Forests also influence climate, water cycle and air-quality. That is why forests are called “green lungs”. ... The plants provide oxygen for animal respiration and also absorb carbon dioxide from the atmosphere. In this way plants help in maintaining the balance of oxygen and carbon dioxide in the atmosphere.

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Geetanand Yadav 6 years, 10 months ago

Because they provide us oxygen that's why they are called lungs and due to their green colour they are called green lungs

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What is operating system?

Posted by Rudra Sen Singh 5 years, 8 months ago

CBSE > Class 08 > Science

1 answers

Anjali Kumari 6 years, 10 months ago

An operating system is system software that manages computer hardware and software resources and provides common services for computer programs.

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An example of non-electrolyte

Posted by Piyush King 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Alia Agarwal 6 years, 10 months ago

Distilled water

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Calorific value of coal

Posted by Enigmatic Aadi 6 years, 10 months ago

CBSE > Class 08 > Science

2 answers

Karan Bora 6 years, 10 months ago

27000 joule/kf

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Keerthana Keeru 6 years, 10 months ago

27000joule/kg

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What is the definition of electrode

Posted by Bijay Kumar Mahapatro 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Manjit Singh 6 years, 10 months ago

Wrap copper wires around the metal caps of the carbon rod and join them to a battery that is called electrode

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Phytoplanktya live near water .why?

Posted by Jalaj Garg 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Gunit Bhardwaj 6 years, 10 months ago

yes

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What is difference between cilia and flagella write any three differences

Posted by Tarun Kumar 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

1. Cilia are short, hair like appendages extending from the surface of a living cell whereas flagella are long, threadlike appendages on the surface of a living cell.

2. Cilia is found in eukaryotic cells whereas flagella is found in both prokaryotic and eukaryotic cells.

3. Cilia are short whereas flagella are long.

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Why comet are visible near the sun?

Posted by Parveen Kumar 6 years, 10 months ago

CBSE > Class 08 > Science

3 answers

Manjit Singh 6 years, 10 months ago

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Raghav Bansal 6 years, 10 months ago

Comets are visible near the sun because of sunlight and heat as the moisture on the comet turns into vapour and is visible to us

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Kanchan Singh 6 years, 10 months ago

Comet are visible near the sun due to the sunlight

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Explain flame

Posted by Vivek Rawat 6 years, 10 months ago

CBSE > Class 08 > Science

2 answers

Lakhan Rajput 6 years, 10 months ago

Because they not have their own light .When they come in the contect of sunlight so,they can visible?

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Tarun Kumar 6 years, 10 months ago

Flame is a region over which gases burn when you burn piece of paper or wax candle a flame is produced

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The process of rusting cannot be called combustion. Give reason.

Posted by Vivek Rawat 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Manjit Singh 6 years, 10 months ago

The process of rusting is called combustion because in this oxygen is involved

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Please explane friction

Posted by Mujeeb Khan 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Pushp Raj 6 years, 10 months ago

The force acting along the two surfaces in contact with opposes the force is called friction

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What is the full form of LED?and describe about LED.

Posted by Bijay Kumar Mahapatro 6 years, 10 months ago

CBSE > Class 08 > Science

2 answers

Yogita Ingle 6 years, 10 months ago

Light emitting diodes are none other than the highest widely used standard source of light in electrical equipment. A light releasing diode is none other than an electric component that would emit light when the current of electricity would be passing through it.

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Chinmay P 6 years, 10 months ago

Lea is light emitting diode. It takes less energy to work compared to CFL

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what are the different ways in whichwater gets contaminated

Posted by Ankitĺlĺl Kumar Singh 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Lakhan Rajput 6 years, 10 months ago

This is very useless question

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A and B are two fuelsm A has calorific value 110 kj/kg and ignition temperature 25°C. B has calorific value 40 kj/kg and ignition temperature 120°C. Which fuel is better and why?

Posted by Arshdeep Singh Gill 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

The amount of heat energy produced on complete combustion of 1 kg of a fuel is called its calorific value. Fuel A has high calorific value than B so it is a better fuel.

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How to convert celcius in fahrenheit

Posted by Mahesh Sharma 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Yogita Ingle 6 years, 10 months ago

In converting the temperature from Celsius to Fahrenheit the formula is F = (9/5)C + 32.

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What is H2SO4

Posted by Vedant Jagtap ? 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Mahesh Sharma 6 years, 10 months ago

Sulphuric acid

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What are astroids

Posted by Samu Pandagle 6 years, 10 months ago

CBSE > Class 08 > Science

3 answers

Kanchan Singh 6 years, 10 months ago

It was question or answer

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Bijay Kumar Mahapatro 6 years, 10 months ago

There is a large gap between the orbits of Mars and Jupiter. this gap is occupied by a large number of small objects that revolve around the sun.these are called asteroids.asteroids can only be seen through large telescope's.

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Yogita Ingle 6 years, 10 months ago

Asteroids can also be called minor planets of the inner solar system. There are millions of asteroids in the asteroid belt. More than, 750,000 are found in the asteroid belt, which is located between Jupiter and Mars. Asteroids can be as wide as hundreds of kilometres. Most asteroids are made of rocks, but with the latest explore some are found to be composed of iron and nickel.

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Explain how electrolysis of water is done

Posted by Khush Shah 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 10 months ago

Electrolysis of water is its decomposition to give hydrogen and oxygen gases due to the passage of an electric current.

Electrolysis of water :-

2H₂O + electrical energy --> O₂ + 2H₂

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Do all stars move?

Posted by Devesh Jain 6 years, 10 months ago

CBSE > Class 08 > Science

4 answers

Isha Isha 6 years, 10 months ago

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Lakhan Rajput 6 years, 10 months ago

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Manjit Singh 6 years, 10 months ago

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Yogita Ingle 6 years, 10 months ago

No. The earth rotates from west to east on its axis. So, all the stars in the sky (except pole star) appear to move from east to west. With reference to earth, the pole star does not appear to move in the sky because it is located above the axis of rotation of the earth in the north direction. It appears to remain stationary at a point in the sky.

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Males secretes which harmone

Posted by Sunandini Sharma 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Gaurav Seth 6 years, 10 months ago

Leydig cells of testes produce sperms and secrete a hormone called testosterone.

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How will you trace image formation in plane mirror?

Posted by Ushma Sinha 6 years, 10 months ago

CBSE > Class 08 > Science

1 answers

Meghna Thapar 5 years, 6 months ago

The image formed by a plane mirror is always virtual (meaning that the light rays do not actually come from the image), upright, and of the same shape and size as the object it is reflecting. A virtual image is a copy of an object formed at the location from which the light rays appear to come. A mirror image (in a plane mirror) is a reflected duplication of an object that appears almost identical, but is reversed in the direction perpendicular to the mirror surface. As an optical effect it results from reflection off of substances such as a mirror or water.

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Daigram of electroscope

Posted by Aman Sharma 6 years, 10 months ago

CBSE > Class 08 > Science

2 answers

Yogita Ingle 6 years, 10 months ago

Structure of Electroscope: It is made of a glass jar. A vertical brass rod is inserted into the jar through a cork. The top of the brass rod has a horizontal brass rod or a brass disc. Two gold leaves are suspended from the brass rod; inside the jar.