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olution : The cell membrane is a very thin layer of protein and fat. It allows only selective substances to pass through it, hence,it is called a selectively permeable membrane. I hope it help yoy

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Give Two example of controlled motion and uncontrolled motion

Posted by Vedansh Sahu(✖﹏✖) 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

a controlled motion is one in which we can controlled the permanent of the motion like velocity, acceleration etc.
eg .. motion of car is controlled motion.
uncontrolled motion is irregular and which we not controlled .
eg . motion of splinter after the blast.

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Explain the meaning of the following equation v=u+at

Posted by Khushi Aggarwal 3 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Ashutosh Mishra 3 years, 4 months ago

V = velocity U = initial velocity T = time A = acceleration v = u+at means Velocity = initial velocity + acceleration × time

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Navansh Panchal 3 years, 4 months ago

T is the time

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Navansh Panchal 3 years, 4 months ago

A is the acceleration

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Navansh Panchal 3 years, 4 months ago

U is the starting velocity

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Navansh Panchal 3 years, 4 months ago

V is the velocity

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The minute hand of a clock is 7 cm long. Calculate the distance covered and displacement of minute hand of the clock in half an hour.

Posted by Shivam Tiwari 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Shivam Tiwari 3 years, 3 months ago

Please show full solution

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Ashutosh Mishra 3 years, 4 months ago

Distance = 22 Displacement = 7

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What are the characteristics of the Particles of the Matter?

Posted by Samridhi Gupta 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Navansh Panchal 3 years, 4 months ago

1. Particles are attract each other 2. Particles have space between them 3. Particles are in continuous

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Are the three state of Matter inter-convertible? How can they interconnect?

Posted by Alisha Das 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Girdhar Arora 3 years, 3 months ago

Yes the three states of matter and inter - convertible because they can change state Let us take an example which is most common- Ice when heated for some time converted to water (fusion)and water when heated converted to gas (vaporisation )and when liquid is freezes it converted to ice as solid(freezing ) and when gas particles collide with cold substance they converted to liquid (condensation )and when gas is directly converted to solid or vice - versa (shows by only some substance like camphor and ammonium chloride) it is called sublimation This how the states interconnect

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Why does eukaryotic cells found only in animal cell

Posted by Arnav Patial 3 years, 4 months ago

CBSE > Class 09 > Science

0 answers

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What is the function of endoplasmic reticulum

Posted by Pranjal Singh 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.

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What happens when an inflated air balloon is pricked with a pin? Name the property of the gaseous state exhibited by this observation.

Posted by Alisha Das 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Arpit Giri 2 years, 3 months ago

Due to the property of diffusion in gases an inflated air balloon deflates when pricked with a pin. Diffusion property in gases is very fast. The molecules in a balloon are under higher pressure and their concentration is higher (packed more closely together) hence the diffusion from inside to outside takes place, but by the very nature of diffusion outside to inside takes place very fast, when pricked with a pin making the balloon to deflate.

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Sia ? 3 years, 4 months ago

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Name the phenomenon which causes one crystal of Potassium permaganet to turn a beaker of water purple ?

Posted by Mohit Chauhan 3 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Tejashree Urs Mg 3 years, 4 months ago

It is through the diffusion of all the crystals of potassium permanganate to water particles. it get disolve in water

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Yuvraj Gupta 3 years, 4 months ago

The phenomenon is called Diffusion.

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Gaurav Bishaya 3 years, 4 months ago

Diffusion

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Harshit Dhote 3 years, 4 months ago

Also because- particles of matter are continuously moving

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Harshit Dhote 3 years, 4 months ago

This is due to diffusion

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Differentiate between animal cells and plant cells

Posted by Shlok Amruskar 3 years, 4 months ago

CBSE > Class 09 > Science

4 answers

Samridhi Gupta 3 years, 4 months ago

Animal cell:- 1) Cell wall was absent 2) Plasma membrane is the outer layer which provides turbidity to the cell. 3) Vacuoles are small in size. 4) Plastids are absent. 5) Nucleus lies in the centre. Plant cell:- 1)Cell wall was present. 2) Cell wall is the outer layer of the cell which gives which gives rigidity and turgidity to the cell. 3) Vacuoles are big in size. 4) Plastids are present. 5) Nucleus lies in the side. I hope this answer will help to you and Thank you....

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Vaibhav Sarda 3 years, 4 months ago

Animals cells have small vacuoles while plant cells have large vacuoles.Animal cell does not have cell wall while plant cell have cell wall.Centrosomes are present in animal cell while absent in plant cell.Plastids are absent in animal cell while present in plant cell.

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Bhavana S 3 years, 4 months ago

Animal cells lack cell wall large sized vacuole,plastids etc

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Deepika Mahlawat 3 years, 4 months ago

Animal cell = animal cell do not have cell membrane while plant cell have cell wall

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v=90km/h=90×1000m by 3600s. What is 3600s? Chapter motion

Posted by Sarang Laiju 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

1 m/s = 11000×3600 km/h=185km/h11000×3600 km/h=185km/h
6 m/s = 6×185=21.6 km/h

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v=90km/h=90×1000m by 3600s What is 3600s

Posted by Sarang Laiju 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

1 m/s = 11000×3600 km/h=185km/h11000×3600 km/h=185km/h
6 m/s = 6×185=21.6 km/h

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Chorolopast means what

Posted by Vivek Anand 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Yuvraj Gupta 3 years, 4 months ago

Chloroplast is a green pigment present in plants which is used by plants for the process of photosynthesis.

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HOW RER ANS SER DIFFRENT FORM OTHER

Posted by Tanmai Jadhav 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Bhavana S 3 years, 4 months ago

Rer consists of ribosomes

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Trisha Verma 3 years, 4 months ago

Ser synthesise lipids and ReR synthesise proteins

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WHAT ARE THE TYPES OF PLASTIDS

Posted by Krishna Das 3 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Yuvraj Gupta 3 years, 4 months ago

Chromoplasts Leucoplasts Chloroplasts

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Vivek Anand 3 years, 4 months ago

Chorolopast Chromoplasts Geronotoplats Leucoplats

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Trisha Verma 3 years, 4 months ago

Chloroplast, leucoplasts and chromoplasts

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Sadhana Gupta 3 years, 4 months ago

Chromoplast and leucoplasts

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Krishna Das 3 years, 4 months ago

CHROMOPLASTS & LEUCOPLASTS

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Sodium chloride from it's solution in water

Posted by Leena Jadoun 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Princi Kumari 3 years, 4 months ago

Yes

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Hakmu Khan 3 years, 4 months ago

Matter

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Activity 8.3

Posted by Tirth Purohit 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Hakmu Khan 3 years, 4 months ago

Solid

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Take a metre rope

Posted by Tirth Purohit 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

Please ask question with complete information.

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Explain with the help of labeled diagram,the mayopia defect and how is it corrected by a lens

Posted by Simran Ghumaan 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Yash Chaudhary 3 years, 4 months ago

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Define nucleoid? How many chromosome are found in it

Posted by Dhwani Gupta 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Kanishka Bohra 3 years, 4 months ago

Nucleous nucleous is called nucleiod

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Lakshmi Raj 3 years, 4 months ago

Undefined nuclear region containing only nucleic acids is called a nucleiod . - it is a spherical shaped organ and it usually contain 1 chromosomes

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What is limitation of doberenier triads

Posted by Nfk Nfk 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 4 months ago

The identification of new elements made this model obsolete. Newly discovered elements did not fit into the triads. Only a total of 5 Dobereiner's triads were identified. Even several known elements did not fit into any of the triads.

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What do you mean by scalar and vector?

Posted by Ayush Kumar 3 years, 4 months ago

CBSE > Class 09 > Science