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Proton	Neutron
Protons are present in the nucleus of an atom.	Neutrons are present in the nucleus of an atom.
Protons are positively charged.	Neutrons are neutral.
The mass of a proton is approximately 2000 times as the mass of an electron.	The mass of neutron is nearly equal to the mass of a proton.

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Function of vacuole

Posted by Atique Ahmad 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Yogita Ingle 7 years, 6 months ago

Vacuoles are just like little pockets in the cytoplasm of a cell where a cell stores food.
They are found in both animal and plant cells but are much larger in plant cells. Vacuoles are mostly made of water and amino acids.
They play roles in intracellular digestion and the release of cellular waste products.
They also play a role in turgor pressure. When a plant is well-watered, water collects in cell vacuoles producing rigidity in the plant. When a plant does fails to get adequate amount water, pressure in the vacuole is reduced and the plant wilts.

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Aryan Singh 7 years, 6 months ago

Vacoule are Ergastic body which helps in storage and in some organisms it acts as digestive bag

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Why pressure is a scaler quantity? Prove

Posted by Anubhav Rai 7 years, 6 months ago

CBSE > Class 09 > Science

3 answers

Sakshi Singh 7 years, 6 months ago

Because pressure does not depend on direction.

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Aryan Singh 7 years, 6 months ago

Because Pressure have only magnitude.and for proving pressure=force/area=vector/scalar =Scalar and it has no direction so,it is scalar

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Sonali Singh 7 years, 6 months ago

Because pressure have only magnitude

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what is carbohydrate

Posted by Yogesh Kushwah 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Sakshi Singh 7 years, 6 months ago

Carbohydrate is a product produced by plants during photosynthesis. It is edible to us.

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Aryan Singh 7 years, 6 months ago

Carbohydrate is also called co2.it is.a gas which is present in atmosphere and Human excrete and plant breathe it.

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In class 11 biology chapter structural organisation in animals is it necessary to do all three animals

Posted by Shubha Varma 7 years, 6 months ago

CBSE > Class 09 > Science

0 answers

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Who did classification of kingdom

Posted by Satbik Sudi 7 years, 6 months ago

CBSE > Class 09 > Science

4 answers

Sany Roy 7 years, 6 months ago

Aristotle and Thalopus artificial kingdoms on the basis of the habitat of organisms

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Anubhav Rai 7 years, 6 months ago

Carlous linnaeous-2 kingdom,Ernst haeckel-3 kingdom,Copeland-4 kingdom,R.H.whittaker-5 kingdom

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Harmanjit Singh 7 years, 6 months ago

Carlous linnaeous 2 kingdom and R.H.whittaker 5 kingdom classification

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Satbik Sudi 7 years, 6 months ago

Robert whittaker

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Why does a desret cooler cool better on a hot dry day?

Posted by Ansh Tyagi 7 years, 6 months ago

CBSE > Class 09 > Science

3 answers

Riddhi Dayma 7 years, 6 months ago

Because temperature and surface area ks high Therefore evaporation becomes high and desert cools better on hot dry day

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Neha Panwar 7 years, 6 months ago

The evaporation takes place desert cooler and cool the pad present in the cooler as result the air which comes outside better on a hot dry day.?

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Ajay Panwar 5 years, 11 months ago

Because u have ****

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Two objects of mass •1kg and •2kg are moving along the same line and direction with velocities 2 met/sec and 1 met/sec respectively they collide and after collison the first object moves at a velocity of 1•67 met/sec. Determine the velocity of the second object

Posted by Chandan Singh Thakur 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Chandan Singh Thakur 7 years, 6 months ago

I won solution

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Some Information about cell membrane

Posted by Mahi Khokhar 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Rohit Kumar 7 years, 6 months ago

Cell membrane is also called as semi permeable or selectively permeable membrane it allows or deny the entry of any material .it allow only selectively material through it. It is made up of lipid and protein

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Mahi Khokhar 7 years, 6 months ago

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What is the def. Of atom

Posted by Kumar Sundaram 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Sakshi Singh 7 years, 6 months ago

Smallest unit of a matter is called atom.

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What is difference between evolution and variation?

Posted by Hritik Raushan 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Sany Roy 7 years, 6 months ago

Origin of the organisms is called evolution and their varieties is called variations.

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Who descover neutons

Posted by Kunal Kishore 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 7 years, 6 months ago

In the year 1932, James Chadwick discovered neutrons, another subatomic particle. He bombarded a thin sheet of beryllium by α-particles and found that electrically neutral particles with a mass slightly greater than that of the proton were being emitted. Chadwick called these particles as neutrons.

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List two condistion the need to be salisist fide for the work to be done on an object

Posted by Anurag Bordoloi 7 years, 6 months ago

CBSE > Class 09 > Science

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Why the pressure on the ground is more when a man is walking then he is standing.

Posted by Safwan Khan 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Sany Roy 7 years, 6 months ago

As surface area is less?

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Give some examples of thrust.

Posted by Safwan Khan 7 years, 6 months ago

CBSE > Class 09 > Science

0 answers

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The volume of 50 gram of substance is 20 cm cube is the density of water is 1 cm per cube will be the substance float or sink?

Posted by Dhruv Sharma 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Sany Roy 7 years, 6 months ago

Density of the substance =mass /volume. So the density of the substance is 2.5 gm/cm cube

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Sany Roy 7 years, 6 months ago

The substance will sink

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Why does a block of plastic released under water come up to the surface of water?

Posted by Dhruv Sharma 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Jainish Prajapati 7 years, 6 months ago

Due to bouyancy

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In what direction does the bronze force on an object immersed in a liquid act?

Posted by Dhruv Sharma 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Sany Roy 7 years, 6 months ago

The buoyant force will act upwards

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विच टाइप ऑफ सलूशन इनफॉर्म्ड वैन चालक एंड वाटर आर्मी स्ट टूगेदर

Posted by Abhishek Yadav 7 years, 6 months ago

CBSE > Class 09 > Science

2 answers

Aman Mangat 7 years, 6 months ago

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Abhishek Yadav 7 years, 6 months ago

Gbkink

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Explain why diffusion occurs more quickly in a gas than in a liquid .

Posted by Rishabh Yadav 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Rebel Guy 7 years, 6 months ago

Because force of attraction is very less in gases and their particles flow easily

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State the universal law of gravitational plz fast ?

Posted by Somya Soni 7 years, 6 months ago

CBSE > Class 09 > Science

3 answers

Rithvika Reddy 7 years, 6 months ago

According to the universal law of gravitation every object in the universe the every other object with a force which proportional to the product of mass and square of the distance between them

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Jimi Jamatia 7 years, 6 months ago

According to universal law of gravitation every particularin the naiverse attract every other particle with a force which is directly proportional to the product of their masses and inversely propartional to the square of the distance between .

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Aman Salmani 7 years, 6 months ago

The universal law of gravitation States that every object in the universe attracts every other object with the force called the gravitational force. The force acting between two object is directly proportional to product of their masses and inversely proportional to the square of the distance between their centres.

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what is illness

Posted by Kaniga Kaniga 7 years, 6 months ago

CBSE > Class 09 > Science

0 answers

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Define Sublimation.Name two solids that sublime on heating.Expalin how dry ice is formed?

Posted by Priyanka Pal 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Aman Mangat 7 years, 6 months ago

The changing of solid to gas without changing into liquid is called sublimation. Ammonium chloride and camphor.

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What is universal law of gravitation?

Posted by Anushka Jain 7 years, 6 months ago

CBSE > Class 09 > Science

1 answers

Sany Roy 7 years, 6 months ago

Force is directly proportion to the masses of the two bodies and inversely proportion to the square of the distance between the two bodies. That force attracts two bodies?

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What are the charecteristics used for a hierarcial classification

Posted by Riya Anan.V Riyachinnu 7 years, 6 months ago

CBSE > Class 09 > Science