CBSE > Class 09 > Science | CBSE Board | Homework Help

Chromatin material present in nucleus and when cell is about to divide we can see chromatin material change into chromosomes... But,chloroplasts are green-coloured Plastids

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Atharva Shukla 2 years, 1 month ago

Their spelling starts with "c". 😂😂just kidding Actually chromatin and chromosomes are related to each other because they are found in animal cells. But, chloroplast is found in plant cells. Hence they are not similar

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Explain hypotonic, hypertonic and isotonic solution

Posted by Gagan Goyal 2 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Priyanka Devi 2 years, 1 month ago

Hypotonic solution- A cell has less osmotic concentration as that of another. A cell placed in hypotonic solution will swell up and become turgid Hypertonic solution- A cell has same concentration as that of another. A cell placed in hypertonic solution will neither gain or lose water. Isotonic solution- A cell has osmotic concentration higher as that of another. A cell placed in isotonic solution will lose water and become flaccid

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Explain the cell division and their type.

Posted by Siddharth Ugare 2 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Sanvi Mishra 2 years, 1 month ago

Cell division is a process in which mother cell dive into two doughter cell Cell division is of two type mitosis and meiosis

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Priyanka Devi 2 years, 1 month ago

Cell division is of two types mitosis or mieosis

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ANSWER

food resources and chemical in Andhra Pradesh

Posted by Sayantani Karmakar 2 years, 2 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

please provide notes for matter in our surroundings

Posted by Pratiksha Jain 2 years, 2 months ago

CBSE > Class 09 > Science

5 answers

Aman Kumar 2 years, 1 month ago

I have notes of matter in our surrounding

1Thank You

Atharva Shukla 2 years, 1 month ago

Go to class notes website

0Thank You

Gagan Goyal 2 years, 1 month ago

Anything which occupies space and have mass is known as matter

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Astha Upadhyay 2 years, 2 months ago

What is the matter

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Shakti Gohil 2 years, 2 months ago

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ANSWER

Mention some characteristics of cells

Posted by Saniya Warsi 2 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Mayank Jain 2 years, 1 month ago

It's a structural, basic, fundamental, functional unit of life

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ANSWER

To make a saturated solution 36g of....

Posted by Aditi Rana 2 years, 2 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Write any process of separating two mixtures

Posted by Neeraj Chauhan 2 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Deshna Jain 2 years, 1 month ago

Filtration, centrifugation

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ANSWER

GIVE any two example unsaturated solution?

Posted by Kanak Patidar 2 years, 2 months ago

CBSE > Class 09 > Science

0 answers

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List the uses of isotopes

Posted by Thanu T 2 years, 2 months ago

CBSE > Class 09 > Science

3 answers

Prisha . 2 years, 2 months ago

Two types of cell

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Kanak Patidar 2 years, 2 months ago

0Thank You

Minni Bunga Mrithi 2 years, 2 months ago

How many types of cells

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Homogenous mixtures

Posted by Shaurya Chavan 2 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Aafiya Usmani 2 years, 1 month ago

The solution which cannot dissolve

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Vyshnodevi H G S 2 years, 2 months ago

The mixtures that have a uniform composition throughout the mixture is called a homogenous mixture. For example : A solution of salt in water or sugar solution

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ANSWER

What are homogenous mixtures

Posted by Shaurya Chavan 2 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Mayank Jain 2 years, 1 month ago

Homogenous mixture are those which can't separate easily Ex is sugar solution and salt solution

1Thank You

Minni Bunga Mrithi 2 years, 2 months ago

Homogeneous mixtures all dossiloved in water example sugar are dissolved in water

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Example 8.3 A motorcar is moving with a velocity of 108 km/h and it takes 4 s to stop after the brakes are applied. Calculate the force exerted by the brakes on the motorcar if its mass along with the passengers is 1000 kg.

Posted by Sagar Chavhan 2 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Jagruti Mohanta 2 years, 2 months ago

108×5/18=6m/s Acceleration=v-u/t 6-0/4=7.5 F=m×a F=1000×7.5=75000

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ANSWER

How does the water kept in an earthen pot matka become cool during summer in short answer

Posted by Utkarsh Kumar 2 years, 2 months ago

CBSE > Class 09 > Science

3 answers

Deshna Jain 2 years, 1 month ago

In earthen ports there are small pores due to which the water seep out and this water takes the latent heat of earthen pot and evaporates,keeping the pot cool .

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Sanvi Mishra 2 years, 1 month ago

Due to the phenomenon of latent heat .

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Shubha Pathak 2 years, 2 months ago

Because the there is evaporation happen that's why it becomes cold

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ANSWER

Science questions

Posted by Prachi Gupta 2 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Prachi Gupta 2 years, 2 months ago

a car is moving with a constant velocity of 500 km and the mass of the car is 1000 kg find the net force acting on it

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ANSWER

Jermaine in absent in blood anchors

Posted by Sahil Mondol 2 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Sahil Mondol 1 year, 9 months ago

Teetar ke bare mein likhen

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ANSWER

Why blood is heterogeneous mixture ?

Posted by Revati Bidgar 2 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Mayank Jain 2 years, 1 month ago

Because it has different composition of it's constituents and we can't separate it's components

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Purnima Rani Das Bengoli 2 years, 2 months ago

Bengoli for science class 9 ka

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Which of the following are matter? Chair, air, love, smell,hate, almonds, thought, cold, lemon water, smell of perfume

Posted by Asit Yadav 2 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Yashika Tyagi 2 years, 1 month ago

Chair, almonds,lemon,

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Anuj Gajare 2 years, 2 months ago

Chair, air, almonds, lemon, water, smell of perfume

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ANSWER

Similarity between electrostatic and magnetic force

Posted by 25-Hridyanshi Singh 8D 2 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Asit Yadav 2 years, 2 months ago

Which of the following are matter? Chair,air,love,smell,hate,almonds,thought,cold,lemon water,smell of perfume

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25-Hridyanshi Singh 8D 2 years ago

Both are non contact forces , both are attractive and repulsive in nature.

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ANSWER

Why we can observe water droplet outside of a tumbler containing ice cold water

Posted by Sharmila Senthilkumar 2 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Gagan Goyal 2 years, 1 month ago

When water vapour present in the atmosphere come in the contact with ice cold water it loses energy and converts from gas to liquid

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Shweta Rai 2 years, 2 months ago

Due to evaporation

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what is a slice of a cork ?

Posted by Seema Seervi 2 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Akshi Singh 2 years, 2 months ago

Cork is a bark of tree and slice means piece that means piece of bark

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Mohammad Noushad Shaik Mohammad Noushad 2 years, 2 months ago

It made up of tree

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Two objects A and B of masses 100 gram and 200 gram are moving along the same line in the same direction with velocity of 2 m per second and 1 m per second respectively.They collide and after the collision the object B moves at a velocity of 1.67 m per second. Determine the velocity of the object A

Posted by Devalina Hazarika 2 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Parismita Kalita 2 years, 2 months ago

Mass of one of the objects, m1 = 100 g = 0.1 kg Mass of the other object, m2 = 200 g = 0.2 kg Velocity of m1 before collision, v1=2m/s Velocity of m2 before collision, v2=1m/s Velocity of m1 after collision, v 3Mass of one of the objects, m1 = 100 g = 0.1 kg Mass of the other object, m2 = 200 g = 0.2 kg Velocity of m1 before collision, v1=2ms−1 Velocity of m2 before collision, v1=1ms−1 Velocity of m1 after collision, v3=1.67ms−1 Velocity of m2 after collision = v4 According to the law of conservation of momentum: Total momentum before collision = Total momentum after collision ∴m1v1+m2v2=m1v3+m2v4 0.1(2)+0.2(1)=0.1(1.67)+0.2(v4) 0.4=0.167+0.2v4 v4=1.165ms−1 Hence, the velocity of the second object becomes 1.165 m/s after the collision.

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ANSWER

Acceleration state sl unit

Posted by Priya Priya 2 years, 2 months ago

CBSE > Class 09 > Science