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

No products in the cart.

Ask questions which are clear, concise and easy to understand.

Ask Question

What is called sublimation?

Posted by Yeswanth Mass 5 years, 1 month ago

CBSE > Class 09 > Science

3 answers

M U 5 years, 1 month ago

Sublimation is the conversion between the solid and the gaseous phases of matter, with no intermediate liquid stage. For those of us interested in the water cycle, sublimation is most often used to describe the process of snow and ice changing into water vapor in the air without first melting into water.

Akshat Kumar 5 years, 1 month ago

Sublimation refers to the change of a solid to gas without going through liquid state.

Yogita Ingle 5 years, 1 month ago

Sublimation

The phenomenon of change of solid directly to gas or conversion of gas directly to liquid without changing into liquid state is called sublimation. For instance, camphor also called capoor when kept for a long time vanishes. This is due to the sublimation of camphor.

ANSWER

Neuron looks like?

Posted by Yeswanth Mass 5 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Rashi Gaur 5 years, 1 month ago

Neuron look like a big tree

Khushi Gupta 5 years, 1 month ago

Neuron looks like badminton

Neeraja D 5 years, 1 month ago

Neurons have a large number of extensions called dentries. They often look likes branches or spikes extending out from the cell body........

ANSWER

Gd evening friends

Posted by Neha Jangid ??? 5 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Neha Jangid ??? 5 years, 1 month ago

Ohhhhh!

ANSWER

A 10 g bullet traveling at 200m/s strikes and remain embedded

Posted by Anshika Yadav 5 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Neeraja D 5 years, 1 month ago

Given, m1=10g=10/100kg m2=2kg u1=200m/s u2=0 m/s Here we use formula m1u1+m2u2=(m1+m2) By using this formula we get, 10/1000×200+2×0=(10/1000+2)v =2+2×0=(10+2000/1000)v 2=(2010/1000)v 2=201/100× v 2×100=201× v 200/201=v V=0.99m/s So the target will move at the speed of 0.99m/s

ANSWER

How is melting point related to intermolecular forces of attraction? Why is latent heat of fusion.

Posted by Mehak Kumari 5 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Mehak Kumari 5 years, 1 month ago

The intermolecular forces of attraction are the bonds that the particles in the matter form with each other. The stronger the bond, the stronger are the intermolecular forces of attraction between them. When the intermolecular forces of attraction are strong, a higher amount of heat energy will be needed to breaks these bonds and hence the melting point of strong intermolecular forces of attraction will be higher. The latent heat of vaporization is higher than latent heat of fusion because the intermolecular space between gas particles is the greatest and the intermolecular forces of attraction are almost negligible. Hence more energy is needed to convert liquid into a gas. The transition of solid into liquid requires less energy because the energy used for this is only needed to decrease the intermolecular attraction between the particles.

ANSWER

Why cell membrane called plasma membrane ?

Posted by Siddhi Jain 5 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Kani Mozhi 5 years, 1 month ago

https://meet.google.com/scc-gevp-xab

Aryan Roy 5 years, 1 month ago

Kddjdfkg

ANSWER

Name any five unicellular organisms?

Posted by Sumit Kumar 5 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Shashank G .B 5 years, 1 month ago

Bacteria , fungi, algae, protozoa, archea

R Sanjeev Sanjeev 5 years, 1 month ago

Fungi , algae and bacteria

Kakku Nononono 5 years, 1 month ago

Bacteria, Protozoa, Fungi, Algae, Archea

Mohit Chauhan 5 years, 1 month ago

Fungi, Algae, Archea

Mohit Chauhan 5 years, 1 month ago

Bacteria, Protozoa

ANSWER

Other name of RBC? Who can answer this question?

Posted by Sumit Kumar 5 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Kartik Gupta 5 years, 1 month ago

Erythrocytes

Himanshi Gill 5 years, 1 month ago

Erythrocytes

R Sanjeev Sanjeev 5 years, 1 month ago

Red Blood cell

Kakku Nononono 5 years, 1 month ago

Thrombocytes

ANSWER

What is haversain system?

Posted by Sumit Kumar 5 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 5 years, 1 month ago

The osteon or Haversian system is the fundamental functional unit of much compact bone. Osteons are roughly cylindrical structures. Each Haversian canal generally contains one or two capillaries and nerve fibres. The channels are formed by concentric layers called lamellae. ... These canals are called Haversian canals. Haversian canals are contained within osteons, which are typically arranged along the long axis of the bone in parallel to the surface.

ANSWER

We know that Newton's first law says that a body at rest will remain at rest or a body at motion will remain at motion untill or unless an external force is applied. Than how a dog moves when it's at rest without any external force?

Posted by Anirudh Nautiyal 5 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

How do substance move out of the cell?

Posted by Chumki Seth 5 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Hetvi Patel 5 years, 1 month ago

Through process called diffusion and osmosis

Kartik Gupta 5 years, 1 month ago

By the process of diffusion and osmosis

Mohit Chauhan 5 years, 1 month ago

In Facilited diffusion into or out of cells down there concertation gradient through protein channel in the membrane. Simple diffusion and Facilited diffusion are similar in that both involve movement down the concertation gradient

Yogita Ingle 5 years, 1 month ago

Diffusion involves the movement of substances from a region of higher concentration to a region of lower concentration. Diffusion is an important process for living things as it helps in moving substances in and out of cells.

ANSWER

Who discovered anode rays ?

Posted by Mohit Chauhan 5 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Khushi Gupta 5 years, 1 month ago

E.Goldstein

Yogita Ingle 5 years, 1 month ago

An anode ray (also positive ray or canal ray) is a beam of positive ions that is created by certain types of gas-discharge tubes. They were first observed in Crookes tubes during experiments by the German scientist Eugen Goldstein, in 1886. Later work on anode rays by Wilhelm Wien and J. J.

ANSWER

Who discovered anad rays

Posted by Mohit Chauhan 5 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Kani Mozhi 5 years, 1 month ago

Robert hocke

Ashna Gurjar 5 years, 1 month ago

Robert hock

ANSWER

What is Latin name of Potassium

Posted by Mohit Chauhan 5 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Rashi Gaur 5 years, 1 month ago

Kelium is Latin name of potassium

Muskan Mishra 5 years, 1 month ago

Kelium

Kartik Gupta 5 years, 1 month ago

Kelium That's why potassium represented by symbol-K

Hetvi Patel 5 years, 1 month ago

Kelium

Vaibhav Jagrit 5 years, 1 month ago

Kelium

ANSWER

How many chapter u have completed in sci

Posted by Aman Rangi 5 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Aman Rangi 5 years, 1 month ago

Tumara exam ho gya

ANSWER

Hii gus

Posted by Aman Rangi 5 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Aman Rangi 5 years, 1 month ago

Fir m kya kru

Aman Rangi 5 years, 1 month ago

Focus on ur study

ANSWER

Hi.........

Posted by Shreya Waghmare 5 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Akshat Holland Minettee 5 years, 1 month ago

Hi

《Aruba》°°° 《Sayed》❤ 5 years, 1 month ago

Hyy

Chaitali .26 5 years, 1 month ago

Hello shreya

Nikhil Verma 5 years, 1 month ago

Hii

Muskan Mishra 5 years, 1 month ago

Hiiiii

ANSWER

25.5km/h= ? cm/s

Posted by Shiishirra Nagapally 5 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Ashna Gurjar 5 years, 1 month ago

Dfddd

Parth Bansal 5 years, 1 month ago

Km/h x 5/18 or 1000/36000 =cm/s So, 255/10 x 5/18 = 7.0833 Here is your answer dude.. You can use both 5/18 and 1000/36000 ..

Yogita Ingle 5 years, 1 month ago

km/h = cm/s x 0.036

cm/s = km/h ÷ 0.036

cm/h = 25.5 ÷ 0.036 = 708.33 cm/s

Preeti Singh 5 years, 1 month ago

Dfddd

ANSWER

Namaste friends ?

Posted by Likhith Liki 5 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Nitish Magesh 5 years, 1 month ago

Namaste

Nandni Jindal 5 years, 1 month ago

Naamaste likhith liki

Muskan Mishra 5 years, 1 month ago

Namaste likhith

《Aruba》°°° 《Sayed》❤ 5 years, 1 month ago

Adab likhith....

ANSWER

I want the notes of gravitation chapter

Posted by Keshav Agrawal 5 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Harshita Kush 5 years, 1 month ago

I have

Muskan Mishra 5 years, 1 month ago

I also

Tanisha Dahiya 5 years, 1 month ago

I also

ANSWER

The flow of materials in Xylem is unidirectional, But in Phloem materials can move in both direction – comment.

Posted by Sujita N B 5 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Meghna Thapar 5 years, 1 month ago

The movement of water and minerals in xylem is unidirectional and the movement of phloem sap in phloem is bidirectional respectively. Plants need water for their growth, and it uptakes water through the roots. Water that is taken by the roots has to reach all the leaves or branches, here the xylem function as transportation of water. Therefore, the movement of water and minerals in xylem is always an unidirectional and always upwards. Whereas, the movement of phloem is bidirectional this is because, once the food is synthesized it is the phloem that transfers the food to all the parts of plants wherever it is necessary. So, movement of materials inside phloem is bidirectional, both upwards and downwards.

So, the correct answer is option B.

ANSWER

Holaaaaaa ?

Posted by Asmi . 5 years, 1 month ago

CBSE > Class 09 > Science

3 answers

《Aruba》°°° 《Sayed》❤ 5 years, 1 month ago

Hiiiiiii

Sarah Mariyam 5 years, 1 month ago

Hello in german language Hello! What can i do for you

Muskan Mishra 5 years, 1 month ago

Heyy

ANSWER

Is school is opened in your area or State

Posted by Likhith Liki 5 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Silent King 5 years, 1 month ago

Yes

Muskan Mishra 5 years, 1 month ago

No

Chaitali .26 5 years, 1 month ago

No

C Abbi 5 years, 1 month ago

No

ANSWER

#dare to answer ............q)consider there is a place like antartica & its temparature is -2degrees celius& at that place one table is kept & on that table the big cubiodal block of ice is kept and on that ice one rope is kept and to the rope of its both ends two big stones are tied now my question is what will happen to that rope and that block of ice \

Posted by Tiger$ Praful Jawale 5 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Tiger$ Praful Jawale 5 years, 1 month ago

THE THREAD WILL GO DOIWN AND THRE BLOCK OF ICE WILL NOT BREAK IT'S TRUE

Tiger$ Praful Jawale 5 years, 1 month ago

UR ANS IS WRONG

Sarah Mariyam 5 years, 1 month ago

I think after some time the table will break or the cuboidal block will break due to heaviness of stones tied on the both ends of rope

ANSWER

Mention the name of the organisms which obtain their food from decaying organic matter. What are those organisms at least 3 Not , those organisms were called I know those are called saprophytes I am asking examples of saprophytes (atleast 3 organisms plz)

Posted by Santosh Terli 5 years, 1 month ago

CBSE > Class 09 > Science

3 answers

P C 5 years, 1 month ago

Indian pipe. Corallorhiza orchids. Mushrooms and molds. Mycorrhizal fungi

P C 5 years, 1 month ago

Hope it helps

P C 5 years, 1 month ago

*cheese mold, and yeast *fungi like mushrooms and bacteria like Lactobacillus.

ANSWER

Evaporation causes?

Posted by Yeswanth Mass 5 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Arshad Khan 5 years, 1 month ago

Cooling

Akshat Holland Minettee 5 years, 1 month ago

Evaporation causes cooling.

Nadeem Khan 5 years, 1 month ago

Hi

Sujita N B 5 years, 1 month ago

Vapour

Yogita Ingle 5 years, 1 month ago

During evaporation process the particles of liquid gain energy from their surroundings in order to overcome the force of attraction between them. This causes loss of heat energy in the surroundings that is why evaporation causes cooling.

ANSWER

what is a length of *****

Posted by Soham Gholap 5 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sarah Mariyam 5 years, 1 month ago

The length of ******is #######

ANSWER

A farmer moves along the boundary of a rectangular field of side 10 m in 40 sec .what will be the magnitude of the displacement of the farmer at the end of 2 minutes 20 sec from his intial position?

Posted by Srujan Desai 5 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 5 years, 1 month ago

Total distance covered 10m in 40sec
Total time taken= 2min 20sec= 140sec
Total round completed = 140/40=3.5 rounds

So If an object moves from A to D, the shortest path will be from A to C. So displacement is AC, that we will find by Pythagoras theorem.
AC²= AB² +BC²
AC²= (10)² +(10)²
AC²= 100+100
AC²=200

AC = (200)1/2

AC= 10× (2) ½

ANSWER

Cell is discovered by ?

Posted by Yeswanth Mass 5 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Aaroh Gupta 5 years, 1 month ago

Robert hooke in 1665

Hriday Saha 5 years, 1 month ago

Robert Hooke

Harmeet Kaur 5 years, 1 month ago

Robert Hooke in 1655

🖤 🖤 5 years, 1 month ago

Robert Hooke in 1665

P C 5 years, 1 month ago

Robert Hooke in 1665

ANSWER

A 10kg mass at rest explodes such that it splits into two parts such that the heavier part weighs 4 times the lighter one. If the heavier mass goes due west with velocity of 5 metres per second , find the velocity of the lighter part. Also specify the direction in which it goes.

Posted by Samiksha Mehta 5 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

Page 153 of 1369

myCBSEguide App

myCBSEguide

Trusted by 1 Crore+ Students

Test Generator

Test Generator

Create papers online. It's FREE.

CUET Mock Tests

CUET Mock Tests

75,000+ questions to practice only on myCBSEguide app

Google Play

Download myCBSEguide App