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A projectile is an object upon which the only force acting is gravity. There are a variety of examples of projectiles. An object dropped from rest is a projectile (provided that the influence of air resistance is negligible). An object that is thrown vertically upward is also a projectile (provided that the influence of air resistance is negligible). And an object which is thrown upward at an angle to the horizontal is also a projectile (provided that the influence of air resistance is negligible). A projectile is any object that once projected or dropped continues in motion by its own inertia and is influenced only by the downward force of gravity.

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What is differences between monocot and dicot

Posted by Simar Kwatra 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Bhavya Singh 7 years, 6 months ago

Monocot have two parts like almond and dicot is single like mango seed

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Bhavya Singh 7 years, 6 months ago

They are types of seed

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When will the magnitude of speed and velocity of a moving body be equal answer in short

Posted by Shivam Mishra 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Harsh Manaswi 7 years, 6 months ago

When an obj move in straight line with uniform speed

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Oxfords not brogues

Posted by Star Pilot L 7 years, 6 months ago

CBSE > Class 09 > Science

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What is the frog example for

Posted by Ambaresh S 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Ambaresh S 7 years, 6 months ago

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Growth of plant. Is it chemical change or physical change

Posted by Anurag Raj 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Yash Kumar 7 years, 6 months ago

Yes

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Prachi Agrawal 7 years, 6 months ago

Physical change

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Give differences between blood and lymph

Posted by Diwanshi Gupta 7 years, 6 months ago

CBSE > Class 09 > Science

3 answers

Deepika Gupta 7 years, 6 months ago

And lymph has only white blood cells

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Deepika Gupta 7 years, 6 months ago

Blood has red blood cells and white blood cells both.

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Ambaresh S 7 years, 6 months ago

Ffff

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Ramesh look two beakers A and B containing hot water and cold water. In each beaker he dropped a piece of copper sulphate. He kept the beakers undisturbed. After some time what did he observe and why

Posted by Harsh Vardhan Singh 7 years, 6 months ago

CBSE > Class 09 > Science

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If the mass of a body and force acting on it both are doubled, what happens to its acceleration?

Posted by Kashish Garg 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Srishty Verma 7 years, 6 months ago

The acceleration remains same as, f = ma a = f\m a = 2f\2m

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What is the derivation of universal law of gravitation

Posted by Alka Shingewad 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 7 years, 6 months ago

Universal law of gravitation: The universal law of gravitation states that every object in the universe attracts every other object with a force called the gravitational force. The force acting between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centres.
Derivation: For two objects of masses m1 and m2 and the distance between them r, the force (F) of attraction acting between them is given by the universal law of gravitation as:
F ∝ m₁....... (i)
F ∝ m₂ ......... (ii)
F ∝ 1/r² ......... (iii)
Form the above equation we can write them folllowing
F ∝ (m₁m₂)/r²
F = G (m₁ m₂)/r²
The above equation is the mathematical representation of Newton's universal law of fravitation

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Which is thebiggest tree in the world

Posted by Lakshya Agarwal 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

David Soreng 7 years, 6 months ago

Check out the question carefully

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Anushka Parmar 7 years, 6 months ago

Giant sequoia

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During burning both physical and chemical changes take place. Can you distinguish these

Posted by Sneha Duggal 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 7 years, 6 months ago

When a candle burns, both physical and chemical changes occur.
Physical Changes in Burning Candle: On heating, candle wax melts and form liquid wax. It is a physical change. Since it again turns into solid wax on cooling. This is a reversible change.
Chemical Changes in Burning Candle: When you light the candle, the wax present near the wick will melt. Wick absorbs the liquid wax. The liquid wax vaporizes due the heat produced by the flame. This wax vapor near to flame burns and gives new substances like Carbon Dioxide, Carbon soot, water vapours, heat and light. This is an irreversible change.

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Fire is which matter

Posted by Rishu Mauraya 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Rajinder Kumar. 7 years, 6 months ago

Matter are three types of the solid liquid and gas

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Swollen feet and ankle can be naturally cured by dipping them in salt water . Suggest the mechanism involved in this treatment A)diffusion B) osmosis C)plasmolysis D)deplasmolysis

Posted by Khushi Saini 7 years, 6 months ago

CBSE > Class 09 > Science

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Relation between G&g

Posted by Vandana Kumari 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Bhavya Singh 7 years, 6 months ago

We know ma=F so Ma(a=g)=GMeM/R^2 M cancle out from the equation g=GMe/R^2 hence a relation is stablished

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On which force earth is suspended in universe

Posted by Shivam Kumar 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Sweta Yadav 7 years, 6 months ago

because of gravity

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An animal is dorsoventrically flattened, has three embryonic germ layers and is acoelomate. Which phylum does it belong? What are they commonly called?

Posted by Srishti Arya 7 years, 6 months ago

CBSE > Class 09 > Science

0 answers

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What is sumblimation

Posted by Vishal Kumar 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Ushaan Kapoor 7 years, 6 months ago

The process in which gas is directly converted into solid or vica versa without changing into liquid state.

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Pragya Shah 7 years, 6 months ago

The Process by which solid changes into gas by heating and vice versa on cooling is known as sublimation

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Which methds is commonly used for improving cattle breeds and why

Posted by Jainab Aasiya 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Jainab Aasiya 7 years, 6 months ago

Cross breeding indigenous breads with exotic breeds.Foreign or exotic breads have higher milk yield and longer lactation periods as compared to indigenous breads. There are two methods of cross breeding - natural and artifical insemination

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How is Newton's 3rd law of motion similar to law of conservation of momentum?

Posted by Sneha Vij 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Nidhi R Ballal 7 years, 6 months ago

It's completely related How means the third law states about the force and momentum and it also tells us that there is an equal & opposite force acting upon it & in that conservation law you find that when body B falls on body A ,it moves as much as body B does?

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Naman Kumar 7 years, 6 months ago

Netwon third law say that for every action there is a equal and opposite reaction and in conservation of momentum body A apply force on body B and also body B apply equal and opposite force on body A

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Define centrification ?

Posted by Priyanka Badgujar 7 years, 6 months ago

CBSE > Class 09 > Science

5 answers

Ushaan Kapoor 7 years, 6 months ago

Centrifugation is a process by which we can seperate cream from milk etc.The principle is that when we countineously stir a solution the lighter particles come in center in case of cream and heavier particles get on side in case of milk.hope it will help you.???

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Nidhi R Ballal 7 years, 6 months ago

Centrifugation is the process of seperating cream from milk through centrifuge device. It is similar to the churning curd Doctors use it to separate all the components from blood.?

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Ann Mary Joseph 7 years, 6 months ago

Centrifugation???? It is the process of separating cream from milk by stirring with the help of centrifuge by using centrifugal force in which the heavier particles settle down and water floats.

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Star Pilot L 7 years, 6 months ago

Centrifugation is a process of separating cream from milk by stirring continusly the heavier particles (cream) settle down and water floats (milk) . This can also be done by centrifuge stirrer in chemistry lab

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Parthiv Patel 7 years, 6 months ago

Centrifugation in the process to separate the particles which are very small and can easily pass through filter paper. . ????

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