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what is colloidal solution.

Posted by Natania Parihar 3 years, 2 months ago

CBSE > Class 09 > Science

3 answers

Niva Nishka 3 years, 2 months ago

The particles of a colloid are uniformly spread throughout the solution. Due to the relatively smaller size of particles, as compared to that of a suspension, the mixture appears to be homogeneous.But actually, a colliodial solutions heterogeneous. Example – Milk.

Varun Vaid 3 years, 2 months ago

collidal solution is a solution in which small particles are suspended which cannot be seen with naked eyes and they scatter beam of light

Pushkar Tanwar 3 years, 2 months ago

Food additives are chemicals that are added to food in small quantities for example, preservatives are added to food to prevent the growth of microorganisms so that the food can be stored for a longer period. Examples of preservatives are sodium sulphite(Na2SO3) and benzoic acid (C6H5COOH). In ancient times, honey was used as a natural preservative. Antioxidants are also added to food to prevent the oxidation of fats and oils by oxygen in the air. Dyes are added to food to improve its appearance. Classify the substances in the paragraph above into three categories: elements, compounds and mixtures

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Posted by Khushi Phogat 3 years, 2 months ago

CBSE > Class 09 > Science

0 answers

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An object is travelling at 40 m in 8 min and then it covers 18m in 10 mins so what is the average speed of the object

Posted by Vanshika Tanwar 3 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Sid Gha 3 years, 2 months ago

it cover 40m then 18m 40+18=58 it take 8min first then 10mins 8+10= 18 Average speed = distance/time =58÷18 =3.22

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Write a short note on Nucleus

Posted by Srihari Parakkal 3 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Astha Verma 3 years, 2 months ago

It is known as the brain of the cell or controller of cell and is spherical in shape darkly stained structure it lies usually in centre in animal cell but in plant cell it is displaced due to development of vacuoles it is normally found in eukaryotic cells.

Rishika Rawat 3 years, 2 months ago

The nucleus is an organelle found in eukaryotic cells. Inside its fully enclosed nuclear membrane, it contains the majority of the cell's genetic material. This material is organized as DNA molecules, along with a variety of proteins, to form chromosomes.

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Biography chapter second ka kya name hai

Posted by Rishika Rawat 3 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Shrishti Rathore 3 years, 1 month ago

Tissue

Rishika Rawat 3 years, 2 months ago

Good

ANSWER

Define speed name the device installed in automobile which education speed

Posted by Chandan Kumar 3 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Master Jd 3 years, 2 months ago

Answer : Speed of a body gives us an idea of how slow or fast that body is moving. The speed of a running car at any instant of time is shown by an instrument called "Speedometer". The distance travelled by a car is measured by another instrument called "Odometer".

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Velocity time graph

Posted by Rajat Bhatt 3 years, 2 months ago

CBSE > Class 09 > Science

0 answers

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A motor boat starting from rest on a lake accelerates a straight line at a constant rate of 3.0 m spower -2 for 8.0 s. How far does the boat travel during this time?

Posted by Apoorva Singh 3 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Rishika Rawat 3 years, 2 months ago

A motorboat starting from rest on a lake accelerates in a straight line at a constant rate of 3.0

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A motor boat starting from rest on a lake accelerates a straight line at a constant rate of 3.0 m spower -2

Posted by Apoorva Singh 3 years, 2 months ago

CBSE > Class 09 > Science

0 answers

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What is meant by saying that latent heat of vapours of water is 226 kj

Posted by Pradhuman Singh 3 years, 2 months ago

CBSE > Class 09 > Science

0 answers

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Which of these component as blood fight infection????

Posted by Ankit Raj 3 years, 2 months ago

CBSE > Class 09 > Science

3 answers

Dhana Lakshmi S 3 years, 2 months ago

WBC (white blood cells) or it is also know as leucocytes.

Ayushi . 3 years, 2 months ago

White blood cells (WBC)

Ankit Raj 3 years, 2 months ago

G afternoon bro

3Thank You

ANSWER

Molecular mass of water (H2o) is ??

Posted by Ankit Raj 3 years, 2 months ago

CBSE > Class 09 > Science

4 answers

Rajat Bhatt 3 years, 2 months ago

Hope u understood

Rajat Bhatt 3 years, 2 months ago

2(H) + 1(O) = (2 + 16)= 18 u

Rajat Bhatt 3 years, 2 months ago

So that , a.mass of O is 16 and a.mass of H is 1

Rajat Bhatt 3 years, 2 months ago

(H20) = 2 atom of h and 1 atom of oxygen

ANSWER

Symbol of iron is ????

Posted by Ankit Raj 3 years, 2 months ago

CBSE > Class 09 > Science

4 answers

Varun Vaid 3 years, 2 months ago

fe stands for iron

Dhana Lakshmi S 3 years, 2 months ago

Fe stands for Iron.

Ankur Kumar 3 years, 2 months ago

Monica ✨☄️ 3 years, 2 months ago

Fe is the symbol of iron

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Atomic radius is measured in nanometers is

Posted by Ankit Raj 3 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Yashika Khantwal 3 years, 2 months ago

Picometer

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Make a MIND MAP on various components of blood by providing all necessary information about them

Posted by Veedulamudi Manjusha Chand 3 years, 2 months ago

CBSE > Class 09 > Science

0 answers

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A car travels 20m /sec along a road a child runs out into the road 50m ahead the car driver stop the pedal what must the declaration be if the car is stop just before it reach the child

Posted by Srihaan Chandra 3 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 2 months ago

Initial velocity, u=20m/s
Final velocity, v=0m/s
Distance, s=50m

Using relation, v²= u²+ 2as
0²= (20)²+ 2 × a × 50
0²= 400 + 100a
−400 = 100a

a = −400 / 100 = −4m/s²
The car's deceleration must be 4m/s².

ANSWER

What are vacuoles

Posted by Tanishka Dhumal 3 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Monica ✨☄️ 3 years, 2 months ago

Vacuoles are the places in the cell where food is stored. Plant cell has large but one vacuoles where as animal cell has small but many vacuoles.

Hariom Waditake 3 years, 2 months ago

Vacuoles are storage sacs for solid and liquid contents.

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A police jeep chasing velocity of 45 km/hr a their is in another jeep moving with a velocity of 153km/hr police fires a bullet with velocity of 180m /sec calculate the velocity of bullet to strike /hit the jeep of theif

Posted by Srihaan Chandra 3 years, 2 months ago

CBSE > Class 09 > Science

0 answers

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A ball hit a wall horizontal at 6m/s it rebounce horizontal at 4.4 m/s the ball is in contact with the wall for 0.04 sec what is acceleration of the ball

Posted by Srihaan Chandra 3 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 3 years, 2 months ago

initial velocity, u = 6 m/s and final velocity, v= -4.4 m/s

time = 0.04s

thus acceleration = (v-u)/t

a =(- 4.4 - 6)/ 0.04 = -10.4/ 0.04 = -260 m/s²

ANSWER

A substance has a define volume but no define shape state weather this substance is a solid a liquid or a gas

Posted by Gayatri Kumari 3 years, 2 months ago

CBSE > Class 09 > Science

5 answers

Ankur Kumar 3 years, 2 months ago

Liquid

Niva Nishka 3 years, 2 months ago

Liquid

Aishwarya .R 3 years, 2 months ago

Liquid

Master Jd 3 years, 2 months ago

Answer : "Liquid" has a definite volume but no definite shape.

Anshu Kumar 3 years, 2 months ago

Liquid has a definite volume but no definite shape so it takes the shape of container in which it is stored.

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How to find average velocity?

Posted by Saumya Rwt 3 years, 2 months ago

CBSE > Class 09 > Science

5 answers

Rajat Bhatt 3 years, 2 months ago

Both formula are same given in NCERT

Varnika Sondhi 3 years, 2 months ago

Averages velocity= total displacement/ total time

Master Jd 3 years, 2 months ago

But that's for Average speed Piyush

Piyush Kr 3 years, 2 months ago

Total distance traveled by total time taken

Master Jd 3 years, 2 months ago

Answer : By the formula :- Average velocity = Total displacement/Total time taken.

ANSWER

Where do the lipids and proteins constituting the cell membrane get synthesized??

Posted by Suhani Bhatia 3 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Niva Nishka 3 years, 2 months ago

Rough endoplasmic reticulum ( proteins) Smooth endoplasmic reticulum (lipids)

3Thank You

Riyanshi ... 3 years, 2 months ago

Proteins and lipids are being synthesized in endoplasmic reticulum... it is the major function of endoplasmic reticulum

ANSWER

Please help me give me 5 example of linear, circular, vibratary motion

Posted by Aryan Gupta 3 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Karthika Sree 3 years, 2 months ago

The flexibility in plant is due to a tissue called

Ekansh Nandan 3 years, 2 months ago

Linear-Motion of a cycle moving in a straight line. Circular-Motion of an ant moving in a circle vibratory-Layrnx

ANSWER

Who discovered morden cell Theory?

Posted by Hansika Singariya 3 years, 2 months ago

CBSE > Class 09 > Science

5 answers

The Anushka 3 years, 2 months ago

Theodor Schwann

Saumya Rwt 3 years, 2 months ago

Schwann in 1839

Riyanshi ... 3 years, 2 months ago

Rudolf virchow..

Adarsh Kumar 3 years, 2 months ago

Theodor Schwann in 1839

Yuthojit Dey Ix-7 3 years, 2 months ago

Theodar Schwan

ANSWER

Convert the following temperature to Celsius sale (a) 300k ( b) 573k

Posted by Sujeeth Hulyal 3 years, 2 months ago

CBSE > Class 09 > Science

3 answers

Saumya Rwt 3 years, 2 months ago

27°C and 300°C

Adarsh Kumar 3 years, 2 months ago

When we have to convert k into °C we have to substrate 273 from 300 ans will be 27°C & for a ex. 27°C convert in k then we have to add 27+273=300

Sanket Kumar 3 years, 2 months ago

Simple hai bro (a) 27°C , (b) 300°C

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Which type of the cell division is required for growth and repair of the body and which type is involved in formation of gamates?

Posted by Saumya Rwt 3 years, 2 months ago

CBSE > Class 09 > Science

1 answers

Yuthojit Dey Ix-7 3 years, 2 months ago

Mitosis

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A particle is moving in a circular path of radius r the displacement after 3.5 would be?

Posted by Saumya Rwt 3 years, 2 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

1. Where do smooth muscle found? What are there function? 2. Differeantiate between Striated muscle & Smooth muscle. 3. What is the function of intercalated disc in cardiac muscle? 4. Why do the cardiac muscle cell don't get fatigue inspite of continuous contraction & relaxation

Posted by Adarsh Kumar 3 years, 2 months ago

CBSE > Class 09 > Science

2 answers

Adarsh Kumar 3 years, 2 months ago

Why

Rajat Bhatt 3 years, 2 months ago

Bhai apna online test copy kiya hai????????