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Name the inventers of electron ,proton ,newtron respectively ???

Posted by Palak Pandey 5 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Yerrabolu Chakradhar 5 years, 3 months ago

Proton - J J Thomson Electron - Gold Estein Neutrons - James Chadwick

Bhumika Sharma ✓ 5 years, 3 months ago

Sir William crookes invented all three- electron, proton , as well as Neutron........ Feeling nice to help you ?.

ANSWER

What is the contribution of Louise pasture in the study of microorganisms?

Posted by Badshah Ankit 5 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Bhumika Sharma ✓ 5 years, 3 months ago

His contributions are - *His discoveries of principal of vaccination, microbial fermentation, and pasteurization. *Pasture developed practices that are still used today as - for preventing desiases in silkworm, using his germ theory of disease , he invented vaccines for chickens , cholera , anthrax , and rabies.

ANSWER

English determiners is not there

Posted by Bhakti Jugani 5 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Gurleen Kaaur 5 years, 3 months ago

It's very easy . If there is a problem then u can ask from ur teacher or from you tube everything is possible

ANSWER

Difference between Gravity and Gravitational?

Posted by Utkarsh Dhiman 5 years, 3 months ago

CBSE > Class 09 > Science

3 answers

Hdm . 5 years, 3 months ago

Gravity is noun and gravitational is adjective. *Both means to the same thing*

Yogita Ingle 5 years, 3 months ago

Gravitation is the attractive force existing between any two objects that have mass. The force of gravitation pulls objects together. Gravity is the gravitational force that occurs between the earth and other bodies. Gravity is the force acting to pull objects toward the earth.

Manisha Kumari 5 years, 3 months ago

2x+3x

ANSWER

What is the definition of solid

Posted by Akib Khan 5 years, 3 months ago

CBSE > Class 09 > Science

3 answers

Pragati Agrawal 5 years, 3 months ago

A state of matter which have both fixed shape as well as volume also..

Bhumika Sharma ✓ 5 years, 3 months ago

A solid is a state of matter characterized by particles arranged such that their shape and volume are relatively stable.......... A solid is one of the four fundamental states of matter along with liquids, gases , and plasma. Feeling good to help you ?.

Yogita Ingle 5 years, 3 months ago

Solid: Matters which have fixed volume and shape are called solids. For example - stone, wood, brick, ice, sugar, salt, coal, etc. All metals are solid except mercury and gallium.

Properties of solids

Solid has fixed volume.
Solid has fixed shape.
Solid has high density.
Solids are heavy.
Solid does not flow.

ANSWER

Distinguish between solid, liquid and gas in tabular form

Posted by Akash Patil 5 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

Differences between solid, liquid and gas.

ANSWER

The odometer of a car reafs

Posted by Syed Ezan 5 years, 3 months ago

CBSE > Class 09 > Science

4 answers

Prag Rawat 5 years, 3 months ago

Distance Speedometer speed

Mannat Thukral 5 years, 3 months ago

The odometer of a car measures the distance travelled by the car The SI unit of distance is m/s

Vishal Bansal 5 years, 3 months ago

Distance travelled

Aashish Kumar 5 years, 3 months ago

Distance traveled

ANSWER

Discuss in brief Rutherford model of atom

Posted by Deepanshi Kaushik 5 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Deepanshi Kaushik 5 years, 3 months ago

Thanku for this lovely answer

Yogita Ingle 5 years, 3 months ago

Thomson’s model revealed that atom has spherical structure, with positive charge spread all over the sphere and electrons are embedded in it. Also there is equal number of positive and negative charge i.e. atom is electrically neutral.

Ernest Rutherford carried out experiments by taking consideration in Thomson’s model and presented more accurate model i.e. Rutherford’s model. Rutherford bombarded ⍺ particles i.e. He2+ ions on gold foil. Gold foil has very thin thickness of about 1000 atoms thick. Observations of Rutherford’s experiment are
- Most of ⍺ particles passes through gold foil
- Some ⍺ particles get deflected with very small angles from their path
- Very few i.e. 1/ 12000 were reflected back on same path

ANSWER

What is friction what react its in our daily life???

Posted by Palak Pandey 5 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

Friction is the force that resists motion when the surface of one object comes in contact with the surface of another. It is also defined as the resistance offered by the surfaces that are in contact with each other when they move over each other.

We see friction in our day to day activities. Following are the ten examples of friction in daily life:

Walking –It is impossible to walk on the ground without friction. Friction is what holds your shoe to the ground. The friction present on the ice is very little, this is the reason why it is hard to walk on the slippery surface of the ice.
Writing – A frictional force is created when the tip of the pen comes in contact with the surface of the paper. Rolling friction is what comes into play while writing with a ballpoint pen while sliding friction arises when one writes with a pencil.
Skating – A thin film of water under the blade is necessary to make the skate slide. The heat generated by the skate blade rubbing against the surface of ice causes some of the ice to melt right below the blade where the skater glides over the ice. This water acts as a lubricant reducing friction.
Lighting a matchstick – When the head of the matchstick is rubbed against a rough surface, heat is generated and this heat converts red phosphorous to white phosphorous. White phosphorous is highly inflammable and the match stick ignites. Sometimes, matchsticks fail to ignite due to the presence of water. Water lowers friction.

ANSWER

Differentiate between Parenchyma, Collenchyma and Sclerenchyma on the basis of their cell Wall ?

Posted by Sakshi Kumari 5 years, 3 months ago

CBSE > Class 09 > Science

3 answers

Virendra Kumar Singh 5 years, 3 months ago

Parenchyma had thin cell wals so they are loosly packed and intracellular space present on them Collenchyma the cell wall of this tissue is very soft so it helps in the flexibility of plants. Ex.tendrils Sclerenchyma tissue is very hard and stiff which gives the mechanical support to plants.

Sakshi Kumari 5 years, 3 months ago

Parenchyma has a thin cell wall of their cells, and are made up of cellulose. Whereas collenchyma cells have an uneven cell wall made up of pectin and hemicellulose. There is a hard and thick cell wall present of the sclerenchyma cells, which is made up of the lignin.

Sakshi Kumari 5 years, 3 months ago

Parenchyma: The cells of parenchyma have thin walls made of cellulose Collenchyma: The cells of this tissue have cell walls thickened at the corners due to cellulose deposition Sclerenchyma: The walls of sclerenchymotous cells are thinkened due to lignin deposition.

ANSWER

What are vachale?What are the substance stored in it?

Posted by Shubham Sonu 5 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Sakshi Kumari 5 years, 3 months ago

The substances that are present inside a vacuole are water, enzymes, organic acids and carbohydrate molecules. Vacuoles store amino acid, sugars, various organic acids and some potiens.

ANSWER

What are bachate?What are the substance stored in it?

Posted by Shubham Sonu 5 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Shubham Sonu 5 years, 3 months ago

Vacuoles lekha hai

ANSWER

Name the two types of plastids found in plant cell and also write their function.

Posted by Shubham Sonu 5 years, 3 months ago

CBSE > Class 09 > Science

5 answers

Deepanshi Sharma 5 years, 3 months ago

What is commission report in brief

Shivani Sinha 5 years, 3 months ago

Cloroplast & chromoplast

Divya Gupta 5 years, 3 months ago

Chromoplast and leucoplast

Shubham Sonu 5 years, 3 months ago

And their function.

Rakshit Jain 5 years, 3 months ago

Chromoplast and leucoplast

ANSWER

WHAT IS HOMOGENEOUS?

Posted by Daksh Mittal 5 years, 3 months ago

CBSE > Class 09 > Science

4 answers

Poonam Anand 5 years, 3 months ago

Homogeneous is a mixture they can be mixed them properly

Virendra Kumar Singh 5 years, 3 months ago

Homogeneous is a mixture in which particles are uniformly distributed . It is also known as the solution.ex......sugar +water

Vahi Vahi 5 years, 3 months ago

The mixture that can mix completely and appear in one form is called homogeneous mixture..ex-..sugar water, salt water

Yogita Ingle 5 years, 3 months ago

Mixtures which have uniform composition throughout are called Homogeneous Mixture. For example – mixture of salt and water, mixture of sugar and water, air, lemonade, soda water, etc.

Mixture of salt in water is an example of homogeneous mixture. In this mixture, the boundary of salt and water cannot be differentiated. When a ray of light is passed through the mixture of salt and water, the path of light is not seen.

ANSWER

Capter 4

Posted by Sundri Devi Sundri Devi 5 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Sandeya Kazal Chettri 5 years, 3 months ago

Structure of atom

Palak Pandey 5 years, 3 months ago

Structure of atom???

ANSWER

Explain why, we can easily move our hand in air but to do the same through a plank of wood, we need a karate expert

Posted by Astha Prashar 5 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

Particles of air have large spaces between them. On the other hand, wood has little space between its particles. Also, it is rigid. For this reason, we can easily move our hands in air, but to do the same through a solid block of wood, we need a karate expert.

ANSWER

What is connective tissue??

Posted by Navya Navya 5 years, 3 months ago

CBSE > Class 09 > Science

4 answers

Sakshi Kumari 5 years, 3 months ago

It protects and supports the body. The cells are loosely spaced and embedded in an intercellular matrix.

Bhumika Sharma ✓ 5 years, 3 months ago

Tissue that supports, protects, and gives structure to other tissues and organs in the body .

Tannu Gupta 5 years, 3 months ago

Connective tissue helps in binding , supporting , protecting ,transporting substances in the body . There are three types of connective tissues : loose connective tissue ,areolar connective tissue,reticular tissue . It is made up of three main components cells ,protein fibre,extracellular matrix .

Divya Gupta 5 years, 3 months ago

Tissues that supports,protects and give structure to other tissue and organ called connective tissue. It is made up of cells,fibres and gel like substance

ANSWER

What is the meaning of jk

Posted by Karan Patel 5 years, 3 months ago

CBSE > Class 09 > Science

3 answers

Мυѕкαи ? 5 years, 3 months ago

Okay now I am serious jk exactly means just kidding

Мυѕкαи ? 5 years, 3 months ago

Jung kung?of bts

Sandeya Kazal Chettri 5 years, 3 months ago

I dont know but u know the meaning of jk

ANSWER

What is the period mensuration period in girls

Posted by Sarthak Gore 5 years, 3 months ago

CBSE > Class 09 > Science

3 answers

Vaibhav Kumar 5 years, 3 months ago

1 months after mature?

Vaibhav Kumar 5 years, 3 months ago

4 to 6 months

Akhil Sharma 5 years, 3 months ago

?

ANSWER

Heterogeneous mixture have fixed composition . True or false?

Posted by Harsh Snehal Lokhande 5 years, 3 months ago

CBSE > Class 09 > Science

4 answers

Sandeya Kazal Chettri 5 years, 3 months ago

Its true

Aayushi Rawat 5 years, 3 months ago

True

Kumar Mukul 5 years, 3 months ago

True

Usman Sharif X-A 5 years, 3 months ago

True

ANSWER

PDF on food resources and aquatic species of Telangana

Posted by Pragya Punyani 5 years, 3 months ago

CBSE > Class 09 > Science

3 answers

Vaibhav Kumar 5 years, 3 months ago

Yes both are right I am only use this app for checking my knowledge to answer the questions

Ash Greninja 5 years, 3 months ago

Neha malhotra is right?

Neha Malhotra 5 years, 3 months ago

Check it on google instead of wasting time on this app

ANSWER

A horse and a mango tree both are complex living organisms with specialised yet different tissues to perform the basic life process.give two reasons for possessing different tissues.

Posted by Kartik Bhardwaj 5 years, 3 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

What is cell division and why is it necessary

Posted by M. Hoysala 5 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Aayushi Rawat 5 years, 3 months ago

Cell division the process by which new cells are made is cell division . There are two type of cell division mitosis and meiosis

M. Hoysala 5 years, 3 months ago

Cell Division, Mitosis and Meiosis. There are many reasons for the division of cells as cells divide to replace old, dead or damaged cells. Cells divide so that living things can grow. Organisms grow not because cells are getting larger but because cells are dividing to produce more and more cells.

ANSWER

Differentiate between cardiac muscle, smooth muscle, striated muscle.

Posted by Shraddha Namplle 5 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Yogita Ingle 5 years, 3 months ago

1) Skeletal muscles: It is a form of striated muscle tissue, which is under the voluntary control of the somatic nervous system. Most skeletal muscles are attached to bones by bundles of collagen fibres known as tendons.

2) Smooth muscle: Smooth muscle generally forms the supporting tissue of blood vessels and hollow internal organs, such as the stomach, intestine, and bladder.

3) Cardiac muscle: The cardiac muscle function has a movement of contraction, which moves the blood into the heart and the circulatory system that goes throughout the body. The cardiac muscle function is important because it keeps the blood flowing within the heart so that it can continue to pump.

Harshit Kumar 5 years, 3 months ago

Cardiac muscle:- (i)

ANSWER

What is plasma in chemistry

Posted by Harsh Pratap Singh Singh 5 years, 3 months ago

CBSE > Class 09 > Science

5 answers

Usman Sharif X-A 5 years, 3 months ago

Plasma is the 4th state of matter mainly composed of positively and negatively charged in particles.

Badshah Ankit 5 years, 3 months ago

Plasma is the fourth state matter

Yogita Ingle 5 years, 3 months ago

A plasma is a hot ionized gas consisting of approximately equal numbers of positively charged ions and negatively charged electrons.

Specifically, plasma is ionized gas. That is gas that has been given an electrical charge by being stripped of electrons. Such ionized gas is the most abundant observable form of matter in the universe, being the main ingredient in stars and nebulas.

Manish Rawat 5 years, 3 months ago

Plasma is the fourth state of matter which was discovered by S.N Bose and Albert einstein. 99 percent of universe is made up of this matter .

Narendra Soni 5 years, 3 months ago

Fourth state of matter

ANSWER

What is the univeral gravitational constant states?

Posted by Sarita Panda 5 years, 3 months ago

CBSE > Class 09 > Science

3 answers

Yerrabolu Chakradhar 5 years, 3 months ago

The universal law of gravitation states that every object in the universe attracts each other object with a force which is directly proportional to the product of their masses and indirectly proportional to the square of distance between them.

Yogita Ingle 5 years, 3 months ago

To calculate the value of g, we should put the values of G, M and R in Eq. (9), namely, universal gravitational constant,
G = 6.7 × 10^–11 N m² kg^-2, mass of the earth,
M = 6 × 10²⁴kg, and radius of the earth,
R = 6.4 × 10⁶ m.

g=G M/R²

6.7 10^-11 N m² kg^-2 6 10²⁴ kg / (6.4 10⁶ m)² = 9.8 m s^–2.

Thus, the value of acceleration due to gravity of the earth, g = 9.8 m s^–2.

Mukul Kumar 😎 5 years, 3 months ago

The universal law of gravitation states that every object in the universe attracts each other object with a force which is directly proportional to the product of their masses and indirectly proportional to the square of distance between them.

ANSWER

How much litre of 15% sugar solution would it take to get 75g of sugar?

Posted by Pari Kansal 5 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 5 years, 3 months ago

let the no. of litres of water be x
Therefore the solution=75+x
15% (75+x)=75
75+x=75*100/15
x=500-75
x=425 litres.

ANSWER

How can velocity be zero or negative

Posted by Meenu Gupta 5 years, 3 months ago

CBSE > Class 09 > Science

4 answers

Navya Navya 5 years, 3 months ago

Velocity can be zero when displacement is zero as velocity is displacement per unit time and velocity is negative when displacement is negative as velocity is displacement per unit time. Hope this help!

Yerrabolu Chakradhar 5 years, 3 months ago

Velocity can be zero when we throw a stone or ball vertically than its final velocity will be zero but it cannot be negative.

Mukul Kumar 😎 5 years, 3 months ago

When a body is in rest its velocity will be zero When the displacement of an object is negative then its velocity will be negative

Manish Rawat 5 years, 3 months ago

Velocity can be zero when we throw a stone or ball vertically than its final velocity will be zero but it cannot be negative.

ANSWER

Write the formula of compounds formed 1)Ag+and S2- 2)Cr3+ and O2- 3)AI3+ and SO2-4

Posted by Prajwal P 5 years, 3 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Find the molecular mass of the following 1.O2 2.CI2 3.C2H6 4.PCI3

Posted by Prajwal P 5 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Yerrabolu Chakradhar 5 years, 3 months ago

1 . O2 = 2( A of O ) = 2( 16 ) = 32 U 2 . Cl2 = 2 ( A of Cl ) = 2 ( 35.5 ) = 71U 3 . C2H6 = 2( A of C ) + 6(A of H) = 2(6) + 6(1) = 12 + 6 = 18U 4. PCl3 = 1( Aof P ) + 3( A of Cl ) = 1(30) + 3(35.5) = 30 + 106.5 = 136.5U

ANSWER

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