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Diffrence between homogeneous and heterogeneous mixture?

Posted by Priyanka Varindani 4 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Arohi Chakote 4 years, 1 month ago

Homogenous mixtures are also called solutions. They mix with each other but we cannot see the substances in it. It forms single phase. It does not scatter light. For example salt water Heterogeneous mixtures are also called suspensions. They mix with each other but solute settles at the bottom. It forms 2 phases. It scatters the light For example chalk and water

Varun Tyagi 4 years, 1 month ago

What is matter?

Muskan Mishra 4 years, 1 month ago

Homogeneous mixture = A mixture which has the same appearance and chemical composition throughout . Example = air ; mixture of gases etc . Heterogeneous mixture = Heterogeneous mixture is a mixture with a non - uniform composition . When you mix two components that remain seperate from each other, that mixture is called a heterogeneous mixture. Example = A mixture of cement , sugar and water . etc.

ANSWER

What is the difference between speed, velocity and acceleration. Explain with examples

Posted by Meenu Gupta 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Roshan Chand 4 years, 1 month ago

Speed is the distance travelled per unit time and it is a scalar quantity but Velocity is the displacement travelled per uni time and it is a vector quantity whereas acceleration is the rate of change of velocity per unit time and it is a vector quantity

ANSWER

From which process of separation we can separate milk and sugar if sugar is dissolved in milk

Posted by Roshan Chand 4 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Muskan Mishra 4 years, 1 month ago

Destillation process

Meenu Gupta 4 years, 1 month ago

The mixture of milk and sugar can be separated by distillation process because the sugar dissolves in it and becomes misscible liquid which are separated by distillation process

ANSWER

What is potential in current electricity

Posted by Palak Lakhotiya 4 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Palak Lakhotiya 4 years, 1 month ago

Thank you ☺️

Meghna Thapar 4 years, 1 month ago

An electric potential (also called the electric field potential, potential drop or the electrostatic potential) is the amount of work needed to move a unit of charge from a reference point to a specific point inside the field without producing an acceleration. The electric potential, or voltage, is the difference in potential energy per unit charge between two locations in an electric field.

ANSWER

What is the function of blood (5 points)

Posted by Divya Gupta 4 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Yogita Ingle 4 years, 1 month ago

The various functions of Blood include :

It supplies oxygen and carbon dioxide between the lungs and rest of the body.
It supplies essential nutrients to cells such as Amino acid, Fatty acid, Glucose etc.
It transports waste products to be removed by kidney.
It transports hormones.
It has role in inflammation. Eg. leucocytes destroys microorganisms, Platelets initiate blood clotting etc.
It regulates our body temperature.
It regulates pH by interacting acids and bases.

Ash Greninja 4 years, 1 month ago

Blood has many different functions, including: transporting oxygen and nutrients to the lungs and tissues. forming blood clots to prevent excess blood loss. carrying cells and antibodies that fight infection. bringing waste products to the kidneys and liver, which filter and clean the blood. regulating body temperature.

ANSWER

Give the examples of vertical motion (Any 2)

Posted by Trishla Jain 4 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

What is Science? Explain .

Posted by Mohd Faizan 4 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Trishla Jain 4 years, 1 month ago

Science is a subject in which we have to study about those things which are happening in nature or in universe

Mohit Agrahari 4 years, 1 month ago

Science is a Greek word (scientia) meaning to know. Science depends upon experiment and observations which happening around us.

ANSWER

difference between bone and cartilage.

Posted by Jiya Pasare 4 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Jiya Pasare 4 years, 1 month ago

at least five points are needed

Nitika Vatta 4 years, 1 month ago

Cartilage are soft, elastic and flexible tissue that protects bones from rubbing each other

Nitika Vatta 4 years, 1 month ago

Bones are hard , inelastic and tough organ that forms part of vertebral skeleton.

ANSWER

What is tydial effect

Posted by Gamer Ayush 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Gaurav Seth 4 years, 1 month ago

The phenomenon by which the colloidal particles scatter light is called Tyndall effect. If light is passed through a colloid the light is scattered by the larger colloidal particles and the, beam becomes visible. This effect is called Tyndall effect.

ANSWER

What is maristimatic tissue??

Posted by Anushka Singh 4 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Divya Gupta 4 years, 1 month ago

The growth of plants occurs only in certain specific regions.This is because the dividing tissue also known as meristematic tissue,is located at on the top of the plant

Vansh Kesharwani 4 years, 1 month ago

thoseTissue which have ability to divide called meristimetic tissue

Unnati Sharma 4 years, 1 month ago

Tip of plant

Unnati Sharma 4 years, 1 month ago

Meristimatic tissue is found in plants and it helps plant to grow more faster and it is located on the top of plant

ANSWER

Add a few drops of ink to the water and review your results,why did this happei

Posted by Vishal Sharma 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Dabber Dab 4 years, 1 month ago

The color of water will change

ANSWER

Give at least two examples of uniform motion

Posted by Ashvin Kharadi 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 4 years, 1 month ago

Example of Uniform Motion:

If the speed of a car is 10 m/s, it means that the car covers 10 meters in one second. The speed is constant in every second.
Movement of blades of a ceiling fan.

ANSWER

A bus is moving with a speed 72 kilometre per hour can be stopped by breaks after at least 10 metre . what will be the minimum stopping distance if the same bus is moving at speed of 144 kilometre per hour

Posted by Indrani Sahu 4 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Anushka Singh 4 years, 1 month ago

20 min

Roshan Chand 4 years, 1 month ago

The minimum stopping distance of the bus would be 20 metre

ANSWER

Find the angular velocity of satellite which revolves in a circular orbit of radius 35000 kilometre and completes one round in 12 hour.

Posted by Indrani Sahu 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 4 years, 1 month ago

Radius of the circular orbit = 35,000 km.
Time taken to complete one round = 12 hours.
Angle subtended at the centre = 360° [ ∵ Earth is approx circular].
∵ 360° = 2π rad.
∴ Angle subtended at the centre = 2π

Now, Using the Formula,
Angular Velocity (ω) = Angle subtended at the centre in radians/Time taken to complete 1 round.
∴ ω = 2π/12
⇒ ω =(44/7) ÷ 12
⇒ ω = 0.524 rad/hr.
∴ Angular velocity of the satellite is 0.524 rad/hr.

ANSWER

Koi humko puri nayi education policy bata plz

Posted by Kartikeya Srivastav 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Alok Gupta 4 years, 1 month ago

नई शिक्षा नीति 2020: पीएम मोदी ने बताया, क्यों स्कूलों में 10+2 की जगह लाया जाएगा 5+3+3+4 सिस्टम पीएम मोदी ने शुक्रवार को बताया कि नई शिक्षा नीति के तहत स्कूली शिक्षा व्यवस्था में क्यों 10+2 सिस्टम को खत्म कर 5+3+3+4 सिस्टम को लाया जा रहा है। मानव संसाधन विकास मंत्रालय और यूजीसी की ओर से नई राष्ट्रीय शिक्षा नीति पर आयोजित सम्मेलन में अपने संबोधन के दौरान उन्होंने कहा कि बदलते समय के साथ एक नई विश्व व्यवस्था खड़ी हो गई है। एक नया ग्लोबल स्टैंडर्ड भी तय हो रहा है। बदलते ग्लोबल स्टैंडर्ड के हिसाब से भारत के एजुकेशन सिस्टम में बदलाव करने भी बहुत जरूरी है। स्कूल से 10+2 को बदलकर 5+3+3+4 कर देना इसी दिशा में उठाया गया कदम है। हमें अपने स्टूडेंट्स को ग्लोबल सिटीजन बनाना है। हमें इस बात का भी ध्यान रखना है कि वह ग्लोबल स्टूडेंट्स बनने के साथ-साथ अपनी जड़ों से भी जुड़े रहें। नयी शिक्षा नीति में ऐसा प्रावधान किया गया है कि छात्रों को ग्लोबल सिटीजन बनाने के साथ साथ उनको अपने जड़ों से भी जोड़कर रख जाएगा। गौरतलब है कि नई शिक्षा नीति में 10+2 के फार्मेट को पूरी तरह खत्म कर दिया गया है। अभी तक हमारे देश में स्कूली पाठ्यक्रम 10+2 के हिसाब से चलता है लेकिन अब ये 5+ 3+ 3+ 4 के हिसाब से होगा। इसका मतलब है कि प्राइमरी से दूसरी कक्षा तक एक हिस्सा, फिर तीसरी से पांचवीं तक दूसरा हिस्सा, छठी से आठवीं तक तीसरा हिस्सा और नौंवी से 12 तक आखिरी हिस्सा होगा। यहां समझें कि क्या है 5+3+3+4 फार्मेट का सिस्टम- नई शिक्षा नीति- स्कूल शिक्षा का नया ढांचा, 5+3+3+4 फार्मूला फाउंडेशन स्टेज पहले तीन साल बच्चे आंगनबाड़ी में प्री-स्कूलिंग शिक्षा लेंगे। फिर अगले दो साल कक्षा एक एवं दो में बच्चे स्कूल में पढ़ेंगे। इन पांच सालों की पढ़ाई के लिए एक नया पाठ्यक्रम तैयार होगा। मोटे तौर पर एक्टिविटी आधारित शिक्षण पर ध्यान रहेगा। इसमें तीन से आठ साल तक की आयु के बच्चे कवर होंगे। इस प्रकार पढ़ाई के पहले पांच साल का चरण पूरा होगा। प्रीप्रेटरी स्टेज इस चरण में कक्षा तीन से पांच तक की पढ़ाई होगी। इस दौरान प्रयोगों के जरिए बच्चों को विज्ञान, गणित, कला आदि की पढ़ाई कराई जाएगी। आठ से 11 साल तक की उम्र के बच्चों को इसमें कवर किया जाएगा। मिडिल स्टेज इसमें कक्षा 6-8 की कक्षाओं की पढ़ाई होगी तथा 11-14 साल की उम्र के बच्चों को कवर किया जाएगा। इन कक्षाओं में विषय आधारित पाठ्यक्रम पढ़ाया जाएगा। कक्षा छह से ही कौशल विकास कोर्स भी शुरू हो जाएंगे। सेकेंडरी स्टेज कक्षा नौ से 12 की पढ़ाई दो चरणों में होगी जिसमें विषयों का गहन अध्ययन कराया जाएगा। विषयों को चुनने की आजादी भी होगी। पहले यह थी व्यवस्था पहले सरकारी स्कूलों में प्री-स्कूलिंग नहीं थी। कक्षा एक से 10 तक सामान्य पढ़ाई होती थी। कक्षा 11 से विषय चुन सकते थे। नई शिक्षा नीति पर पीएम मोदी के भाषण की अन्य अहम बातें पीएम ने कहा कि राष्ट्रीय शिक्षा नीति 21वीं सदी के भारत की और नए भारत की नींव तैयार करने वाली है। प्रधानमंत्री ने इस बात पर संतुष्टि जताई की देश के किसी भी क्षेत्र या वर्ग से भेदभाव संबंधी कोई शिकायत नहीं आई। उन्होंने कहा, ''हर देश अपनी शिक्षा व्यवस्था को अपने राष्ट्रीय मूल्यों के साथ जोड़ते हुए, अपने राष्ट्रीय ध्येय के अनुसार सुधार करते हुए चलता है। मकसद ये होता है कि देश की शिक्षा प्रणाली अपनी वर्तमान औऱ आने वाली पीढ़ियों का भविष्य तैयार रखे और तैयार करे।'' उन्होंने कहा, ''भारत की राष्ट्रीय शिक्षा नीति का आधार भी यही सोच है। राष्ट्रीय शिक्षा नीति 21वीं सदी के भारत का और नए भारत की नींव तैयार करने वाली है।'' मोदी ने कहा कि राष्ट्रीय शिक्षा नीति की आज देश भर में व्यापक चर्चा हो रही है। अलग-अलग क्षेत्र के लोग, अलग-अलग विचारधाराओं के लोग, अपने विचार प्रकट कर रहे हैं और इसकी समीक्षा कर रहे हैं। उन्होंने कहा कि ये एक स्वस्थ चर्चा है, ये जितनी ज्यादा होगी, उतना ही लाभ देश की शिक्षा व्यवस्था को मिलेगा।

ANSWER

What is vessels

Posted by Hem Kiran Gantla 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Anushka Singh 4 years, 1 month ago

Blood vessel, a part of the circulatory system and function to transport blood throughout the body. Lymphatic vessel, a thin walled, valved structure that carries lymph. Vessel element, a narrow water transporting tube in plant.

ANSWER

Who is responsible for vertical motion and horizontal motion ??

Posted by Trishla Jain 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Trishla Jain 4 years, 1 month ago

There is "what" in place of who

ANSWER

What is vascular tissue?

Posted by Piyu Patil 4 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Anushka Singh 4 years, 1 month ago

Vascular tissue are phloem and xylem they are also known as conducting tissues as the conduct food and water and minerals.

Danni Singh 4 years, 1 month ago

Vascular tissue are phloem and xylem they are also known as conducting tissues as the conduct food and water and minerals.

Yogita Ingle 4 years, 1 month ago

Vascular Tissues – involved in transporting fluid and nutrients internally.

Raziyah Shaikh 4 years, 1 month ago

Vascular Tissue is a complex conducting tissue,formed of more than one cell type,found i vascular plants

ANSWER

What is Brownian motion???

Posted by Ash Greninja 4 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Anushka Singh 4 years, 1 month ago

Brownian movement or motion is zigzag, random movement of microscopic particles suspended in a liquid or gas, caused by collisions between these particles and the molecules of the liquid or gas. The zigzag random movement of collodial particles in a collodial solution is called Brownian movement.

Gaurav Seth 4 years, 1 month ago

Brownian movement or motion is zigzag, random movement of microscopic particles suspended in a liquid or gas, caused by collisions between these particles and the molecules of the liquid or gas.

The zigzag random movement of collodial particles in a collodial solution is called Brownian movement.

Ash Greninja 4 years, 1 month ago

Wrong answer manisha.

Manisha Thakur 4 years, 1 month ago

It is a body typically

ANSWER

What is dispersed phase and dispersion medium

Posted by Roshan Chand 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sanskar Tiwari 4 years, 1 month ago

Despersion medium is solvent like substance in which dispersed phase disolve in colloid and dispersed phase is solute like substance.

ANSWER

State the difference between nucleus and nucleoid ?

Posted by Sumedh Rajurkar 4 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Piyu Patil 4 years, 1 month ago

Thanks

Yogita Ingle 4 years, 1 month ago

Nucleus	Nucleoid
A nucleus is a membrane-bound structure in which eukaryotes assemble their genetic materials.	Nucleoid is a particular area in which prokaryotes assemble their genetic materials.
A nucleus is well organised and is large.	Nucleoid is poorly organised and is small.
A nucleus is engirdled by a double layer membrane known as nuclear membrane which separates the nucleus from other organelles.	Nucleoid lacks a protective membrane.
A nucleus comprises several chromosomes.	Nucleoid usually contains only one chromosome.
A nucleus is a spherically shaped organelle.	Nucleoid is an irregularly shaped organelle.
Nucleoplasm and Nucleolus are present in the nucleus.	Nucleoplasm and Nucleolus are not found in a nucleoid.
It is composed of DNA, RNA, enzymes, dissolved ions, histones and other subnuclear bodies.	It is composed of DNA, RNA, histones and other proteins.

Parima Tendulkar 4 years, 1 month ago

It is given on google you can check

ANSWER

A certain force exerted for 1.2s raises the speed of an object from 1.8m/s to 4.2m/s . Later , the same force is applied for 2 second . How much does the speed change in 2s?

Posted by Ajay Dak 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 4 years, 1 month ago

Here, t=1.2s,u=1.8m/s,v=4.2m/s
acceleration, a=(v−u)/ t = (4.2−1.8)/ 1.2 = 2.4/1.2 = 2m/s²
Now, a as force applied is the same, it will produce the same acceleration.
Change in speed=accelerationxxtime for which force is applied =2×2=4m/s

ANSWER

What is the difference between cytoplasm and protoplasm?

Posted by Pratibha Baghel 4 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Mannat Thukral 4 years, 1 month ago

Cytoplasm is a jelly like substance present between the cell membrane and inner side of nucleus and it contains the organelles which performs various functions in the body of an organism whereas protoplasm is the living substance of the cell which is made by nucleus and cytoplasm

Soumya Mishra 4 years, 1 month ago

Cytoplasm is a jelly like structure present inside the cell in which all organelle are embedded. Cytoplasm and nucleus together are termed as protoplasm. You can understand protoplasm as Nucleus+Cytoplasm=Protoplasm

Trishla Jain 4 years, 1 month ago

Cytoplasm is a also a jelly like substance which is present outside the nucleus

Trishla Jain 4 years, 1 month ago

Protoplasm is a jelly like structure which is classified into two types: Cytoplasm and nucleoplasm

Rahul Thomas 4 years, 1 month ago

It is jelly like substance

ANSWER

Describe the modes of cytokinesis

Posted by Satyam Kumar 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Yogita Ingle 4 years, 1 month ago

Cytokinesis, on the other hand, is defined as the division of the cytoplasm during the M phase of the cell cycle. It is the second step in M phase. This process depends on karyokinesis and cannot occur without karyokinesis. It is the final stage of mitosis, where the cytoplasm and other cell organelles divides between the two daughter cells.

ANSWER

Define the phloem

Posted by Satyam Kumar 4 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Pratibha Baghel 4 years, 1 month ago

In simple language phloem means part of tree or plant

Gaurav Seth 4 years, 1 month ago

Sol:

Transportation in plants is brought about by vascular tissues. These are permanent tissues and include xylem and phloem.

Phloem is the vascular tissue which transports food molecules to the place of necessity in the plant. The elements in the phloem are sieve elements, fibres, phloem parenchyma and companion cells. The transport in the phloem tissue is bidirectional. It forms vascular bundles in association with xylem .Phloem occupies the edges of the vascular bundle.

ANSWER

What is Tyndall effect class 9 chemistry

Posted by Gurman Jeet 4 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Gurman Jeet 4 years, 1 month ago

Thanks

Gaurav Seth 4 years, 1 month ago

This scattering of a beam of light by the particles of a colloid is called the Tyndall effect. When we apply torch light on a galss of milk then the path of the light becomes visible but it is not so in case of water because in milk light is scattered by its very fine particles. See the following diagram:

Tyndall effect can be observed when sunlight passes through the canopy of a dense forest. In the forest, mist contains tiny droplets of water, which act as particles of colloid dispersed in air.

ANSWER

What is velocity???

Posted by Ritika Negi 4 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Palak Lakhotiya 4 years, 1 month ago

Displacement/ time = velocity m/s = unit derived from Units of displacement and time

Pushpendra Mishra 4 years, 1 month ago

Displacement upon time ?

Ravina Gill 4 years, 1 month ago

Displacement upon time

Fatimank1976 Kanchargatti 4 years, 1 month ago

* Displacement of an object in unit time is velocity. * Velocity has both magnitude and direction so, it is vector quantity. * The formula to calculate velocity is displacement /time. * The S. I unit of velocity is meter per second.

Gaurav Seth 4 years, 1 month ago

Velocity: Velocity is the speed of an object moving in a definite direction.
The SI unit of velocity is also metre per second.
Velocity is a vector quantity; it has both magnitude and direction.
In most cases, objects will be in non-uniform motion. Therefore, we describe the rate of motion of such objects in terms of ‘average’.
Example: Consider yourself going to a shop on a cycle, you stop cycle many times on the way and then you come from the shop to your home. Distance from shop to home = 3 km, time taken from home to shop = 1 hour and time taken from shop to home = 2 hour.
Average speed = total distance / total time
= (3+3) / (1+2) = 2 km/hr
Average velocity = displacement / total time
= (3-3) / (1+2) = 0 km/hr

ANSWER

Which plastids are colourless

Posted by Shweta Shweta 4 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Soumya Mishra 4 years, 1 month ago

Leucoplast are the colourless plastids in plants.

Sirajmalik Sirajmalik 4 years, 1 month ago

Leucoplast

Gurman Jeet 4 years, 1 month ago

Leucoplast

Ritika Negi 4 years, 1 month ago

Leucoplast is the correct answer

Rakshikaa Narayana Kumar 4 years, 1 month ago

Leucoplast

ANSWER

d/dx 5

Posted by Suba Shree 4 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

Convert the following temperature to the Celsius scale 293k

Posted by Sarvuday Nirman 4 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Rishabh Jain 4 years, 1 month ago

Celsius=kelvin-273. Celsius=293-273=20

Shreya Singh 4 years, 1 month ago

Celsius = kelvin - 273. ⚫ Celsius = 293-273=20

Sidra Khan 4 years, 1 month ago

293-273 =20

Yogita Ingle 4 years, 1 month ago

Remember the relationship:Temperature in Kelvin = Temperature in °C + 273
Substitute the given value in the equation and then calculate the other unknown value.
293 K = (293 – 273)
= 20 °C

Satish Babu Satish Babu 4 years, 1 month ago

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