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

(in physics) the action or process of dividing the central part nucleus of an atom, when a large amount of energy is created is called fission. (In biology) The division of cells into new cells as a method of creating more cells is called fission.

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How light transmission

Posted by Jayraj Gaikwad 3 years, 3 months ago

CBSE > Class 09 > Science

3 answers

Aryan Yadav 3 years, 3 months ago

Abduction gdyjff

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Ashish Saini 3 years, 3 months ago

A simple definition of light transmission is: When light travels through a medium such as glass without being reflected absorbed or scattered. When this happens light energy is not lost and can be considered 100% transmitted. Thank u ?

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Alexa (◕ᴗ◕✿) 3 years, 3 months ago

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Difference between cytoplasm and protoplasm ?

Posted by Lucky Singh 3 years, 3 months ago

CBSE > Class 09 > Science

3 answers

ᴍᴏʜᴅ ᴀʟᴛᴍᴀs 3 years, 3 months ago

Given that The radius of the orbit = 42250 km Find out Speed if it takes 24 hours to revolve around the earth Solution Therefore, circumference of the orbit = 2*π*42250km = 265571.42 km Time taken for the orbit = 24 hours.. Therefore, speed of the satellite = 11065.4 km.h-1 The satellite orbits the Earth at a speed of 11065.4 kilometers per hour.

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ᴍᴏʜᴅ ᴀʟᴛᴍᴀs 3 years, 3 months ago

An artificial satellite is moving in a circular orbit of radish 42250 km. Calculate its speed if it takes 24 hour to resolve around the earth.

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Shrishti Mishra 3 years, 3 months ago

Cytoplasm is the liquid content inside the cell whereas protoplasm mean (cytoplasm+nucleus)

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What is melting point of ice ?

Posted by Saɴᴋᴇᴛ ???? 3 years, 3 months ago

CBSE > Class 09 > Science

4 answers

Poornika Pant 3 years, 3 months ago

0°C

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Saɴᴋᴇᴛ ???? 3 years, 3 months ago

Literally

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Kamya Pandey 3 years, 3 months ago

The melting point of ice is 273.18 K

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Saɴᴋᴇᴛ ???? 3 years, 3 months ago

The melting point at which ice — a solid — turns to water — a liquid — is 32°F (0°C).

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Definition of cell membrane

Posted by Mustafa Bhagat 3 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Dhanya Sree V.S 3 years, 3 months ago

the semipermeable membrane surrounding the cytoplasm of a cell.

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Saɴᴋᴇᴛ ???? 3 years, 3 months ago

The cell membrane is a biological membrane that separates the interior of all cells from the outside environment which protects the cell from its environment. The cell membrane consists of a lipid bilayer, including cholesterols that sit between phospholipids to maintain their fluidity at various temperatures.

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What are miscible and immiscible liquid?

Posted by Shrishti Sinha 3 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Alexa (◕ᴗ◕✿) 3 years, 3 months ago

Miscible ~ liquid that dissolve each other and particles cannot be seen. For example - Sugar in water Immiscible ~ liquid that do not dissolve each other and particles can be seen. For example - oil in water

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Saɴᴋᴇᴛ ???? 3 years, 3 months ago

Miscible liquids are ones that can mix together – like water and ethanol. Immiscible liquids are ones that can't – like oil and water.

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Note on typhoid

Posted by Lokesh Kumar 3 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Saɴᴋᴇᴛ ???? 3 years, 3 months ago

Typhoid is a bacterial infection that can lead to a high fever, diarrhea, and vomiting. It can be fatal. It is caused by the bacteria Salmonella typhi. The infection is often passed on through contaminated food and drinking water, and it is more prevalent in places where handwashing is less frequent.

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Rajasekhar Rao 3 years, 3 months ago

Satya

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How does applying pressure help in the liquefaction of a gas

Posted by Rupali Kumari 3 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Saɴᴋᴇᴛ ???? 3 years, 3 months ago

Pressure brings close to molecules of a gas that are far apart from each other. When more and more pressure is applied on gas molecules they come closer to each other so inter molecular forces start producing between gas molecules. ... This factor helps in liquefaction of gases

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What is the definition of acceleration? Help karo naa guys any one

Posted by Hema Sri 3 years, 3 months ago

CBSE > Class 09 > Science

5 answers

Anshika Sharma 3 years, 3 months ago

Rate of change in velocity , easy definition, A=v-u/t, and this the formula ☺️

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Kamya Pandey 3 years, 3 months ago

ACCELERATION : It is the measure of change in the velocity of an object per unit time .

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Saɴᴋᴇᴛ ???? 3 years, 3 months ago

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Shrishti Sinha 3 years, 3 months ago

The rate of change of velocity.

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Subham Kumar 3 years, 3 months ago

The rate of change of velocity per unit time

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What are communicable diseases?

Posted by Hema Sri 3 years, 3 months ago

CBSE > Class 09 > Science

5 answers

Parth Dubey 3 years, 3 months ago

Short defination: Diseases which can be catched by coming in conntect of an infected person , are called communicable diseases

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Bhavya Shah 3 years, 3 months ago

Communicable diseases are the diseases which can be transmitted to any person by a person through different medium(source)

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Shrishti Sinha 3 years, 3 months ago

Communicable diseases which can be communicated or transmitted through any medium...

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Grasper Sumon 3 years, 3 months ago

Communicable diseases, also known as infectious diseases or transmissible diseases, are illnesses that result from the infection, presence and growth of pathogenic (capable of causing disease) biologic agents in an individual human or other animal host.

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Hema Sri 3 years, 3 months ago

I mean i need a clear sentence

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Types of mixtures

Posted by Niveetha Niveetha 3 years, 3 months ago

CBSE > Class 09 > Science

4 answers

Preeti Dabral 3 years, 3 months ago

There are two types of mixtures: heterogeneous and homogeneous. Heterogeneous mixtures have visually distinguishable components, while homogeneous mixtures appear uniform throughout. The most common type of homogenous mixture is a solution, which can be a solid, liquid, or gas.

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Khileshwar Yadav 3 years, 3 months ago

There are two types of mixture 1= heterogeneous mixture and 2= homogeneous mixture

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Shrishti Sinha 3 years, 3 months ago

There are mainly two types of mixtures : 1) Heterogeneous mixture 2) Homogeneous mixture

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Bjj Ghh 3 years, 3 months ago

Homogeneous and heterogeneous

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What is the physical state of 100⁰c water

Posted by Swetha Sreenath 3 years, 3 months ago

CBSE > Class 09 > Science

5 answers

Anaya Kumbhar 3 years, 3 months ago

Liquid & gas

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Swetha Sreenath 3 years, 3 months ago

Thanks to alll

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Bhavya Shah 3 years, 3 months ago

It is both liquid and gas. It can be gas because of latent heat and liquid is normal at room temperature

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Lokesh Kumar 3 years, 3 months ago

Both liquid and gas

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Saɴᴋᴇᴛ ???? 3 years, 3 months ago

Gaseous ?

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List the points of differences between homogenous and heterogeneous mixtures.

Posted by Sagar Uu 2 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Sia ? 2 years, 9 months ago

Homogeneous Mixture	Heterogeneous mixture
They have uniform compositions	They have non-uniform compositions.
The components of homogeneous mixtures are not physically distinct.	A heterogeneous mixture has physically distinct components.
They have no visible boundaries of separation between the constituents	They have visible boundaries of separation between the constituents.
Examples: Alloys, Solution of salts in water etc.	Examples: Mixture of sand and common salt, Mixture of sand and water etc.

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deriviation of three equations of motion

Posted by Jeji George 3 years, 3 months ago

CBSE > Class 09 > Science

0 answers

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What is motion sickness

Posted by Mohammed Junaid T.K Patel 3 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 3 years, 3 months ago

Motion sickness is a feeling of dizziness and nausea caused by travelling in a moving car, ship, aircraft, etc.

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From where do farmers obtain inputs that they require

Posted by Sneha Panda 3 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 3 years, 3 months ago

Mainly, farmers buy the inputs on local markets or, if they're looking for plants which are not native for the place they're living in it might be wise to travel once a year to another market farther away to get better prices and quality of some plants.

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Identify in the situation given below making a uniform circular motion :- (a) a car turning around a curve with uniform speed or a car going uphill (b) Motion given to a discuss by an athlete before releasing or motion of discuss when an athlete releases it.

Posted by Pallavi Sahu 3 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Pallavi Sahu 3 years, 3 months ago

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A and B Two train length 400m traveling two parallel track with uniform speed of 72km/h .The driver of train B decide to overtake train A and accelerate by 1m/s upon 2. After 50s the guard of B just bushed passed the driver of A. Then what was the original distance between them

Posted by Adarsh Kumar 3 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 3 years, 3 months ago

For train A:
Initial velocity, u = 72 km/h = 20 m/s
Time, t = 50 s
Acceleration, a_I = 0 (Since it is moving with a uniform velocity)
From second equation of motion, distance (S_I) covered by train A can be obtained as:
{tex}s _ { I } = u t + \frac { 1 } { 2 } a _ { I } t ^ { 2 }{/tex}
= 20 {tex}\times{/tex} 50 + 0 = 1000 m
For train B:
Initial velocity, u = 72 km/h = 20 m/s
Acceleration, a = 1 m/s²
Time, t = 50 s
From second equation of motion, distance (S_II) covered by train A can be obtained as:
{tex}s _ { II } = u t + \frac { 1 } { 2 } a t ^ { 2 }{/tex}
{tex}= 20 \times 50 + \frac { 1 } { 2 } \times 1 \times ( 50 ) ^ { 2 } = 2250 \mathrm { m }{/tex}
Length of both trains = 2 {tex}\times{/tex} 400 m = 800 m
Hence, the original distance between the driver of train A and the guard of train B is 2250 - 1000 - 800 = 450 m.

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Does someone knows?that what are 3 equations of motion in physics?

Posted by Ishika Singh 3 years, 3 months ago

CBSE > Class 09 > Science

3 answers

Shrishti Sinha 3 years, 3 months ago

2as = v^2-u^2 s= ut + 1/2 at^2 v= u + at

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Amit Kumar 3 years, 3 months ago

Yes I know. First equation of motion v=u+at Second Equation of motion s=ut+1/2at^2 Third Equation of motion v^2=u^2+2as

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Anjali Kaur 3 years, 3 months ago

v=u+at s=ut+at^2 v^2=u^2+2aS

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Rajeev went from Delhi to Chandigarh and return to Delhi on his motorbike. The odometer of that read 4200 km at the start of trip and 4460 km at the end of his trip. If Rajeev took 4hr 20 mins to complete his trip then find the average speed and average velocity in kilometre per hour as well is in metre per second

Posted by Preksha Rani Epari 2 years, 10 months ago

CBSE > Class 09 > Science

1 answers

Ahmed Kazi 3 years, 3 months ago

What is matter

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what will we learn for neet

Posted by Dhanya Sree V.S 3 years, 3 months ago

CBSE > Class 09 > Science

0 answers

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Notes of why do we fall ill

Posted by Rohitraj Rai 3 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Bhavya Shah 3 years, 3 months ago

There can be a various reasons of falling ill but the major reason is our surrounding. If your surrounding is dirty then you can fall ill and if your immunity is broken down and need to be improved

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Neha Kumari 3 years, 3 months ago

Ch 1 vigyan

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If distance covered by the object is 224 m in 22 s then what is the speed

Posted by Mohammed Shahith 3 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Amit Kumar 3 years, 3 months ago

Speed= distance/Time = 224m/22s = 10.18 m/s

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Anmol Anand 3 years, 3 months ago

224×22m/sec

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What is slope in chapter motion?

Posted by Devansh Sahu 3 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 3 years, 3 months ago

When an object is moving with uniform velocity, the slope of graph is always a straight line. In other words slope of straight line of a distance-time graph shows that object is moving with uniform velocity. ... Slope OB shows the velocity of the object.

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What is delta ∆?

Posted by Moumitha Reddy 3 years, 3 months ago

CBSE > Class 09 > Science

2 answers

Preeti Dabral 3 years, 3 months ago

The collection of sediments from all the mouths forms a delta. It is triangular shaped landmass.

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Hema Sri 3 years, 3 months ago

This symbols means change

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What is the mean of top up ?

Posted by Sanket ... 3 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Chirag Virdi 3 years, 3 months ago

Top up means to purchase something

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Q. A car moving with a certain velocity comes to a halt if the retardation was 5m/s² , find the initial velocity of the car ?

Posted by Gaurav Bishaya 3 years, 3 months ago

CBSE > Class 09 > Science

1 answers

Preeti Dabral 3 years, 3 months ago

A car moving with a certain velocity comes to a halt in 10 second, if the retardation was 5m/s2, find the initial velocity of the car?
v = u + at
0 = u + (-5 x 10)m/s2,
u = 50m/s2

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A cheetah starts from rest , and accelerates at 2m/s² for 10 seconds . calculate: (a) the final velocity (b) distance travelled

Posted by Gaurav Bishaya 3 years, 3 months ago

CBSE > Class 09 > Science

3 answers

Sanket ... 3 years, 3 months ago

Maths is my passion and profession

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Rohitraj Rai 3 years, 3 months ago

Answer:- Initial velocity ;u=0m/s Final velocity ;v=? Accleration, a=2m/s² Time, t=10s (a) Using, v=u+at v=0+2×10=20m/s (b)Distance travelled is : s=ut+½at² s=0×10+½×2×10×10 s=0+100=100m.

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👌Aditya 👌 👌Kumar👌 3 years, 3 months ago

U=0m/s V=? A=2m/s² Time=10sec Eq. 1 for final velocity (V) Eq. 2 for displacement => s= ut+½at².... It's my pleasure...!????????❤

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Describe different method of a asexual reproduction give examples and sexual reproduction with examples

Posted by Anshika Yadav 3 years, 3 months ago

CBSE > Class 09 > Science