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Write 3 example of distance and displacement

Posted by S . 3 years, 4 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Ch 6

Posted by Naman Kasnia 3 years, 4 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Write 5 examples of Newton's second law

Posted by S . 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

If you use the same force to push a truck and a car, the car will have more acceleration than the truck because the car has less mass.
It is easier to push an empty shopping cart than a full one, because the full shopping cart has more mass than the empty one. This means that more force is required to push the shopping cart.
When a person kicks a ball the person exerts force in a specific direction, that is the direction in which it will travel. In addition to this, the stronger the ball is kicked, the stronger the force we put on it and the further away it will travel.
Suppose two people are walking and among the two people, if one is heavier than the other, then the one weighing heavier will walk slower because the acceleration of the person weighing lighter is greater.
When riding a bicycle, the bicycle acts as mass and our leg muscles pushing on the pedals of the bicycle is the force.

ANSWER

How do substances like carbon dioxide and water move in and out of the cell ? Discuss.

Posted by Anjali Setia 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Sia ? 3 years, 4 months ago

The substances like CO₂ and water move in and out of a cell by diffusion from the region of high concentration to low concentration. When the concentration of CO₂ and water is higher in external environment than that inside the cell, CO₂ and water moves inside the cell. When the concentration outside the cell becomes low and it is high inside the cell, they moves out.

Anmol Preet 3 years, 4 months ago

[?] Carbon dioxide moves across the cell membrane by diffusion. When CO2 concentration in the cell increase in comparison of the CO2 concentration outside the cell there is spontaneous movement of CO2 from region of higher concentration to a region of its low concentration. [?] Water molecules move through selectively permeable plasma membrane by osmosis. Dissolved substance present in water affect the movement of water across plasma membrane.

ANSWER

An object moves along a rectangular path of sides 20m and 40m respectively. It takes 30 minutes to complete two rounds. What is the speed of the objects?

Posted by Risvithan S.R. 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

Distance = Length of path travelled
= AB + BC
= 15 + 9
= 24 km
Displacement = Shortest path from initial to final position
= AC
= (AB)² +(BC)² {Pythagoras Theorem}
= 225 + 81
= 17.5 km

ANSWER

Physics: make a good working model . Please tell me

Posted by Pallavi Pallavi 3 years, 4 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Why chromosomes are called hereditary vehicles

Posted by Anjali Setia 3 years, 4 months ago

CBSE > Class 09 > Science

3 answers

Dikshita Bohra 3 years, 4 months ago

Because they have genes

Nikhil Raj 3 years, 4 months ago

Because chromosomes help to know the offspring is belong to which family or genes that's why we say that chromosomes are called hereditary vehicles

Affan Bahadur Shah 3 years, 4 months ago

O

ANSWER

What is metalloids

Posted by Vinit Patel 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Mahesh Kumar 3 years, 4 months ago

A metalloid is a substance which shows some properties of metals and some properties of non metal.

Shreyash Shelke 3 years, 4 months ago

A metalloid is an element that has properties that are intermediate between those of metals and nonmetals. Metalloids can also be called semimetals.

ANSWER

What is the example of uniform circular motion

Posted by Manan Gulati 3 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Mahesh Kumar 3 years, 4 months ago

Moon moving around the earth and tyres rotating in a car

Srishti Sajal 3 years, 4 months ago

1. Planet moving around the Sun. 2. Satellites moving around the Planet. 3. Athletes moving in circular path.

Seyed Zayaan 3 years, 4 months ago

Fan rotating and tyre rotating

Ashutosh Shukla 3 years, 4 months ago

Moon moving around sun Tyres rotating in car

Girdhar Arora 3 years, 4 months ago

Moon moving around sun Tyres rotating in car

ANSWER

Convert the temperature given below into Kelvin scale. a) -50°C b) 145°C

Posted by Dattatrey Mangavati 3 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Seyed Zayaan 3 years, 4 months ago

273 is kelvin is 0°C Then a) -50°C is 273-50=223 kelvin b)273+145=418kelvin

Abhishek Chaudhary 3 years, 4 months ago

223k and 418k

Manoj Kumar 3 years, 4 months ago

What is metal

Rupam Devi 3 years, 4 months ago

Short note answer

Nildip De 3 years, 4 months ago

(a)223k and (b)418k

ANSWER

Is the birth of light visible in a suspension? Give reason.

Posted by Nancy Guraiya 3 years, 4 months ago

CBSE > Class 09 > Science

3 answers

Girdhar Arora 3 years, 4 months ago

Yes I think

Princi Kumari 3 years, 4 months ago

Cluster of cell is known as tissue

Monalisha Jena 3 years, 4 months ago

What is tissue

ANSWER

Defferentiate scalars and vectors

Posted by Mehak Jahangir 3 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Anmol Preet 3 years, 4 months ago

?????? ???????? :- 1) They have only magnitude not direction. 2) This quantity can be a number and unit. 3) Scalar can divide another scalar. ?????? ???????? :- 1) They have both magnitude and direction. 2) This quantity must need specify the direction along with the magnitude. 3) Vectors cannot divide each other.

Nikhil Raj 3 years, 4 months ago

Scalar quantity are those quantity in which it has only magnitude and vector quantity are those those quantity in which direction and magnitude both involved

Manan Gulati 3 years, 4 months ago

Scaler quantities are the quantities which have magnitude not direction . Vector quantities are the quantities which have both magnitude and direction .

Abhishek Chaudhary 3 years, 4 months ago

Scaler quantities are the quantities which have only magnitude not direction . Vector quantities are the quantities which have both magnitude and direction .

Girdhar Arora 3 years, 4 months ago

Scalar means that quantity that have only magnitude not a specific directions whereas vector quantity have both magnitude and specific direction. E.g= distance is scalar quantity while displacement is a vector quantity .

ANSWER

What is the advantage of having deeply folded membrane in mitochondria?

Posted by Saumya Rwt 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Priyanka Kushwaha 3 years, 4 months ago

It increases the space for atp generation

ANSWER

What will happen when a plant cell is kept in different kind of solution. explain in detail?

Posted by Vraj Patel 3 years, 4 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Why Chromatin material condenses to form chromosomes when the cell is about to divide?

Posted by Sahitya Rathore 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Eva Nayak 3 years, 4 months ago

In mitotic phase it divides

ANSWER

I want the notes of second chapter

Posted by Suryansh Pratap Singh 3 years, 4 months ago

CBSE > Class 09 > Science

3 answers

Taneesha D Patel 3 years, 4 months ago

Which subject tell me I will send

Tausif Khan 3 years, 4 months ago

Kon se sub ka

Saumya Rwt 3 years, 4 months ago

Which subject??

ANSWER

Make a mind maps of the following chapter first matter in our surrounding

Posted by Pandya Urvashi 3 years, 4 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

What are the functions of cell membrane

Posted by Gorika Mahajan 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Abhishek Chaudhary 3 years, 4 months ago

It is the slectevely permeable membrane

Girdhar Arora 3 years, 4 months ago

1)Outermost coving 2)Facilities movement of some materials because it is selective permeable 3 )it is thin and flexible 4) flexibility enables the cell to energy 5) hold the contents of cell 6 )composed of organic molecules(lipid +protein ) 7) living 8) usually present in all cells {including eukaryotic and prokaryotic } 9) provides a definate shape to cell

ANSWER

How gases and liquids are compressible substances ?

Posted by Riti Mehta 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Nibir Mahanta 3 years, 4 months ago

Gases are compressible because the intermolecular space is very large in gases, whereas liquids are not compressible because in liquids, the intermolecular space is less.

ANSWER

The rate of evaporation of a liquid increase on heating . Explain

Posted by Rupsa Mal 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

Evaporation basically means the surface liquid gets enough kinetic energy to change into gaseous state. Definition: when the surface pressure of a liquid is equal to the vapour pressure of the atmosphere, it evaporates.
When we heat a liquid, we give it energy, n hence, the (kinetic) energy of the liquid increases, (so consequently the kinetic energy of the surface liquid also increases.

ANSWER

Which characteristic of a gas is used in supplying oxygen cylinders to hospital??

Posted by Saumya Rwt 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

High compressibility is used in supplying oxygen cylinders to hospitals . Gases have large intermolecular spaces between them and can be easily compressed. The gases can be compressed to liquids and can be stored & transported in cylinders.

ANSWER

Differentiate between mass and weight And what is magnitude?

Posted by Priyanka Kushwaha 3 years, 4 months ago

CBSE > Class 09 > Science

3 answers

Priyanka Kushwaha 3 years, 4 months ago

What is gravitational pull can anyone explain this once more

Aryan Yadav 3 years, 4 months ago

Mass is the material contained in the body. Weight is the gravitational pull acting on the body.

Riti Mehta 3 years, 4 months ago

Mass :- Occupying space Weight :- Volume or vajan or bhar

ANSWER

What happens when a liquid is heated?

Posted by Uttam Prasad 3 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Abhishek Verma 3 years, 4 months ago

When liquid is heated it evaporatesin form of gases

Riti Mehta 3 years, 4 months ago

When a liquid is heated , it changes its state from liquid to gaseous

Srishty Kumari 3 years, 4 months ago

When a liquid is heated , it change its state from liquid to gas .

Priyanka Kushwaha 3 years, 4 months ago

When a liquid is heated Its vaporate

Arastu Maurya 3 years, 4 months ago

It evaporated to form of gas

ANSWER

Name the three states of matter?

Posted by Uttam Prasad 3 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Bhagyashri Patkari 3 years, 4 months ago

Solid, liquid, gas

Saumya Rwt 3 years, 4 months ago

Solid, liquid and gas

Riya Singh 3 years, 4 months ago

Solid, liquid, gas

Srishty Kumari 3 years, 4 months ago

The three states of matter is solid , liquid,gas. Another two is plasma and Bose Einstein Condensate.

Arastu Maurya 3 years, 4 months ago

Solid liquid and gas

ANSWER

Pressure on the surface of a gas is increased.what will happen to the inter particle forces

Posted by Uttam Prasad 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

As pressure is increased the intermolecular forces between the gas molecules are increased. Explanation: Intermolecular forces are the forces of attraction between the molecules of a gas. As the pressure increases the molecules of the gas come closer together and finally form a liquid.

ANSWER

What are the difference between Prokaryotic and Eukaryotic cells

Posted by Sahitya Rathore 3 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Anmol Preet 3 years, 4 months ago

??????????? ???? :- 1) Small in size. 2) Contain single chromosome. 3) Organelles absent. 4) Nucleolus absent. 5) Cell division by fission etc. Examples - bacteria blue green algae etc. ?????????? ???? :- 1) Large in size. 2) Contain more than one chromosome. 3) Organelles present. 4) Nucleolus present. 5) Cell division by mitosis or meiosis. Examples - man etc.

Priyanka Kushwaha 3 years, 4 months ago

We can classify the cell on the basis of their nuclear membrane which is prokaryotic and eukaryotic and prokaryotic cell there is no nucleus and in eukaryotic cell that is a nucleus this is the major difference between prokaryotic cell and eukaryotic cell

Savita Singh 3 years, 4 months ago

Prokaryotic Cells: In some organisms like bacteria, the nuclear material is not enclosed by nuclear membrane and membrane bound cell organelle are absent.Such nucleus is called nucleotid and such cells are known as prokaryotic cell. such cells have single chromosome. Eukaryotic Cells: Cells having well defined nucleus and having membrane bound cell organelle is termed as eukaryotic cell.Such cells have more than one chromosomes.

Priyanshi Maheshwari 3 years, 4 months ago

Sexual reproduction

Priyanshi Maheshwari 3 years, 4 months ago

*** organ

ANSWER

The smell of hot sizzling food reaches you several .etres away but to get the smell from cold food you have to go close

Posted by Mansi Bhoyar 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Jill Pansuriya 3 years, 4 months ago

Particles of matter are continuously moving. They possess kinetic energy. Aa the temperature increases, particles move faster. The particles of aroma diffuse in the air and reach to us several meters away. But to get smell of cold food we need to go closer because the particles of aroma move slowly.

Srishty Kumari 3 years, 4 months ago

At higher temperature molecules diffuse into air at a faster rate and reach longer distances. Hence,the smell of hot sizzling food reaches as quickly even when we are several metres away,but to get the smell of cold food,we have to go close to it.

ANSWER

I can't understand what is inertia

Posted by Hrishi Singh 3 years, 4 months ago

CBSE > Class 09 > Science

3 answers

Anmol Preet 3 years, 4 months ago

The inability of a body to change its state of motion by itself.

Harsh Dubey 3 years, 4 months ago

THE INABILITY TO CHANGE THE STATE OF (REST/MOTION)

Yogendra Kumar 3 years, 4 months ago

Inrtia is pseudo force that act on body , according to Newton second law if a body in rest it will always want to be in its initial condition and same of in motion. If we apply some force on that body which is in rest/motion it opposes the effect of force that's all inertia is .?

ANSWER

What is the reflection

Posted by Anisha Lakra 3 years, 4 months ago

CBSE > Class 09 > Science

3 answers

Riya Singh 3 years, 4 months ago

Reflection is a light image which bounce back from a point to backward.

Sukhandeep Kaur Sukhan 3 years, 4 months ago

It's like a shadow

Abhay Singh 3 years, 4 months ago

Reflection is a conduct light mirror is called reflection

ANSWER

Differentiate between perfume and the perfume smell of perfume following based on the characteristics A) shape B)rigity C) interparticular force of attraction

Posted by Naman Pattanaik 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Girdhar Arora 3 years, 4 months ago

And the last interarticular force of attraction is more in perfume as it is solid .and it is less in smell as it is gas

Girdhar Arora 3 years, 4 months ago

Characteristics of smell of perfume is that it is gas and is highly compressible and it doesn't have fixed volume and fixed shape and it's particles are not closely packed and force of attraction is also very less . Speaking about perfume I think it's bottle of perfume so it's a solid and have fixed shape and volume and can't be compressible and it's particles are closely packed and their kinetic energy is less as diffusion is slow . Smell of perfume is gas so it is not rigid and bottle of perfume is rigid

ANSWER

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