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

You can find this by taking the time taken of sun rays as eight minutes and by considering the speed of light then It this values in in the formula of speed it is speed is equal to distance upon Time

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Arpit Gautam 4 years, 1 month ago

148.57 million km

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What are types of plant and animal kingdom ?

Posted by Priyanshu Kumar Palo 4 years, 1 month ago

CBSE > Class 09 > Science

0 answers

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According to the second law of motion,Force is the cause and outcome of_____ a.accaration b. Impulse c. Momentum d.energy

Posted by Sarthak Gupta 4 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Srishti Raj 4 years, 1 month ago

Momentum

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Ankit Patel 4 years, 1 month ago

Momentum

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Saroj Jangid 4 years, 1 month ago

Momentum..

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Priyanshu Kumar Palo 4 years, 1 month ago

Momentum

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Srihari P 4 years, 1 month ago

momentum

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Define 1 J of work ?

Posted by Sanket ... 4 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Diksha Laniya🐥 4 years, 1 month ago

What sanket

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Sanket ... 4 years, 1 month ago

1 Joule is amount of work done when a force of 1 Newton displaces a body through a distance of 1m in the direction of the force applied. (Google kr liya ) ?

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how many chromosome are present in a cell

Posted by Sri Bhuvaragavan 4 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Manju Kumari 4 years, 1 month ago

46 and 23 pair

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Rutika Tilekar 4 years, 1 month ago

23 pairs

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Rithya Reddy 4 years, 1 month ago

23 pairs Total no - 46

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Vishal Mishra 4 years, 1 month ago

How

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Define Aerenchyma

Posted by Shubh Barnwal 4 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Ankit Patel 4 years, 1 month ago

Paranchyma contain air cavities in it . It helps aquatic plant to float on water so it is called aerenchyma

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Divyansh Jain 4 years, 1 month ago

The paranchyma cells which have large air cavities to provide buoyancy to the plant are known as aerenchyma.

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Aerenchyma

Posted by Shubh Barnwal 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Ishita Sirse 4 years, 1 month ago

Aerenchyma is type of parenchyma which has large cavities and it is present in aquatic plants

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Is there any difference between weight and mass?

Posted by Arjun Gohil 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sanket ... 4 years, 1 month ago

Yes , (I)Mass is a measure of how much force it will take to change that path. Mass depends on how much matter atoms and so on there is in an object; more mass means more inertia, as there is more to get moving.(ii) Weight, on the other hand, is a measure of the amount of downwards force that gravity exerts on an object

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What is work done formula?

Posted by Arjun Gohil 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sanket ... 4 years, 1 month ago

Work done = force × displacement

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Write a relation between the mass and weight of the body with explanation

Posted by Sweety Yadav 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Mayank Chaudhary 4 years, 1 month ago

Mass of a body is the quantity of of matter (or material) contain in it. Weight of a body is the force with which it is attracted towards the centre of the earth.

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Mirror formula is a relation between object distence , image distence and focal length of a spherical mirror it can be written as 1/u+1/v,R is radius of curvature of the mirror.this formula is valid in all situation for all spherical mirror for all posion of the object consider the case in which a mirror forms a real image of height 4 cm of an object of hieght 1 cm is placed 20 cm away from the mirror ..the distence from the object to image is?

Posted by Anusha Shankar Anusha Shankar 4 years, 1 month ago

CBSE > Class 09 > Science

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a motorcar of mass 1200 kg is moving along a straight line with a uniform velocity of. its velocity has slowed down to 36km/h in 4 sec by a force. calculate the accleration and change in momentum. Also find the ammount of force requried.

Posted by Princy Gupta 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Rk Gamers 4 years, 1 month ago

You had left a single information of initial velocity

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Which of the following tissue has dead cell

Posted by Kartik Meena 4 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Arpit Gautam 4 years, 1 month ago

Sclernchyma

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Dhanush S 4 years, 1 month ago

Scherenchyma

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Balkrishna Mishra 4 years, 1 month ago

Sclerenchymatous

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Sanket ... 4 years, 1 month ago

Sclerenchyma is right ans ?

4Thank You

Kartik Meena 4 years, 1 month ago

Epithelial

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Who is the father of biology

Posted by Anurag Kumar 4 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Aviral Tiwari 4 years, 1 month ago

Aristotle

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Rishma Bhuyan 4 years, 1 month ago

Aristotle

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Mohini Raj 4 years, 1 month ago

Aristotle

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Yuvan Yuvan 4 years, 1 month ago

Aristotle

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HW- Science Look at the activities listed below. Reason out whether or not work is done in the light of your understanding of the term ‘work’. • Suma is swimming in a pond. • A donkey is carrying a load on its back. • A wind-mill is lifting water from a well. • A green plant is carrying out photosynthesis. • An engine is pulling a train. • Food grains are getting dried in the sun. • A sailboat is moving due to wind energy. Complete it in your physics copy and submit tomorrow.

Posted by Aasutosh Sahu 4 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

Measure the time it takes you to walk from your house to your bus stop or the school. If you consider that your average walking speed is 4 km/h estimate the distance if the bus stop or school from your house.

Posted by Prastuti Baruah 4 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

What is AIDS virus ?

Posted by Sanket ... 4 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Jaiditya Sinha 4 years, 1 month ago

The term AIDS refers to Acquired Immune Deficiency Syndrome caused by the HIV virus. AIDS is a condition in which the person's immune system weakens to an extent where it is unable to fight any infection.

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Yuvan Yuvan 4 years, 1 month ago

HIV causes AIDS and interferes with the body's ability to fight infections

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Sanket ... 4 years, 1 month ago

This is just for information not for fun ok ?

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ANSWER

? what is the name of that ? Where did it come from? ? People are thinking this as what ??what are the side-effects of this? ? What we can do to prevent this ??? Give example also which we can see this most ? ??

Posted by Ganesh P 4 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Ganesh P 4 years, 1 month ago

Answer : corona

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Pratham Maurya 4 years, 1 month ago

Carona

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Sanket ... 4 years, 1 month ago

I think bacteria ?

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Ganesh P 4 years, 1 month ago

??? find name of this side image

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Name any two groups of mirco- organisms from which antibiotics could be extractet

Posted by J I 4 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Param Sidhu 4 years, 1 month ago

Bacteria and Fungi

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Yuvan Yuvan 4 years, 1 month ago

(Streptomyches produces streptomycin), (penicillin produced by penicillium moulds

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J I 4 years, 1 month ago

Ans

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How much big is our world

Posted by Sandhiya Sri 4 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Honey Sharma 4 years, 1 month ago

Beyond ur imagination

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Yuvan Yuvan 4 years, 1 month ago

5.972*10^24 kg

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Nivetha S 4 years, 1 month ago

5.972 × 10^24 kg

4Thank You

ANSWER

What is p in science ?

Posted by Sanket ... 4 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Sia ? 4 years, 1 month ago

p = m x v. This equation signifies that momentum of a body is the product of its mass and its velocity. Here, p is momentum of the body. m is the mass of the body. v is the velocity of the body.

4Thank You

Sanket ... 4 years ago

Thanks ? vese pta tha

2Thank You

Renuka Patil 4 years, 1 month ago

In science p it is the symbol of momentum. P=mv. This equation tells us that momentum of a body is product of It's mass as well as it's velocity. In the above given equation p denotes the momentum of the body, m denotes the mass of the body and v denotes the velocity of the body. You can study it more deeply in science 9 std chapter motion.

1Thank You

Piyush Raj 4 years, 1 month ago

In science, p is symbol of momentum. p=mv

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Ishita Sirse 4 years, 1 month ago

The p in science is symbol momentum ..

5Thank You

ANSWER

Why do we breathe?

Posted by Raj Dhwaj Raj 4 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Param Sidhu 4 years, 1 month ago

Breathing is an involuntary activity which we can't control it is required to overall control the coordination of body from the blood to the functioning of it since we breathe oxygen as it is required for the blood to circulate and other body organs to produce energy you can understand this with an example you would have a bike a bike need a fuel which may be petrol and this is required essentially for the working of the bike if the fuel is not provided to the bike then we can't utilise bike in the similar way oxygen is is fuel for our body which can only be consumed by breathing so this is the big reason why we breathe and this is also the reason behind it an involuntary activity performed by involuntary muscles you may also have heared sone facts that we cant stop our breathe to die this is also so the explanation of this fact .thanks......

1Thank You

Arjun Gohil 4 years, 1 month ago

We breathe through our lungs ?

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Rishma Bhuyan 4 years, 1 month ago

Oxygen is essential for life. Normal aur contains 21% oxygen, which we breathe into our lungs so it can enter our bloodstream to help with the proper functioning of our tissues and organs. We also breathe as a way to expel carbon dioxide gas, which is a type of waste our bodies produce.

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Raj Dhwaj Raj 4 years, 1 month ago

We breathe to the break down of glucose with the help of oxygen to form A. T. P(Adenosine tri phosphate) this is energy packed to gives us energy.

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ANSWER

if a body covers 3 consicutive equal distances with speed v¹,v²,v³ then the average speed of the body will be

Posted by Princy Gupta 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sia ? 4 years, 1 month ago

Car travels 3 equal distances with speeds v1, v2 , v3 . We need to know that average speed is defined as the ratio of total distance to the total time taken.

Cancelling "s" on numerator and denominator :

So final answer :

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ANSWER

Anyone can you te me what is momentum

Posted by Anshu Kapri 4 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Raj Dhwaj Raj 4 years, 1 month ago

The ability to keep increasing or developing the force that makes something move faster and faster are called momentum.

1Thank You

Vipra Chaubey 4 years, 1 month ago

Product of mass and velocity is called momentum..

3Thank You

Sarmista Nath 4 years, 1 month ago

Formula of momentum is p=mv

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Raghul M.S 4 years, 1 month ago

Momentum, product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle. ... See also conservation law; angular momentum.

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Rishma Bhuyan 4 years, 1 month ago

The quantity of motion of a moving body, measured as a product of its mass and velocity

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How much does the sky weigh?

Posted by Arpit Gautam 4 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Arpit Gautam 4 years, 1 month ago

1.47 lbs per square inch of earth surface

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Rishma Bhuyan 4 years, 1 month ago

14.7 lbs per square inch of earth surface

3Thank You

Diksha Laniya🐥 4 years, 1 month ago

How much does air weigh? This means the sky weighs 14.7 lbs per square inch of earth surface which is roughly 11 billion billion pounds. So, you can say that sky weighs one millionth of the mass of the Earth.

3Thank You

Anshu Kapri 4 years, 1 month ago

Sky does not have weight because it is not a thing it is a cloud or gas

2Thank You

Sachin Kumar 4 years, 1 month ago

Can your tell me

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What are tissue ?

Posted by Sniawmi Shadap 4 years, 1 month ago

CBSE > Class 09 > Science

5 answers

Sachin Kumar 4 years, 1 month ago

The group of cell

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Arpit Gautam 4 years, 1 month ago

Tissue is known as the group of cell

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Sanket ... 4 years, 1 month ago

Group cell is known as tissue

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Rishma Bhuyan 4 years, 1 month ago

Tissue is a group of cells that have similar structure and that function together as a unit.

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Mohd Shadab 4 years, 1 month ago

A group cell is known as tissue

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ANSWER

What are plastid?

Posted by Aditi Jain 4 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Ayush Mishra 4 years, 1 month ago

Plastids are organelle which only found in plants not in animals.

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Arpit Gautam 4 years, 1 month ago

Plastids refer to the double membrane bound organelles found in plant cells.

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Rishma Bhuyan 4 years, 1 month ago

Any of a class of small organelles in the cytoplasm of plant cell, containing pigment or food is called plastid.

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Krish G 4 years, 1 month ago

Plastid is present in animal cell plastids are three type chloroplast chromoplast leucoplast

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What is respire in plant

Posted by Kt Tiwari 4 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sia ? 4 years, 1 month ago

The process of respiration in plants involves using the sugars produced during photosynthesis plus oxygen to produce energy for plant growth. In many ways, respiration is the opposite of photosynthesis. ... As with photosynthesis, plants get oxygen from the air through the stomata.

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Force of gravitation due to earth is called

Posted by Veda Shree 4 years, 1 month ago

CBSE > Class 09 > Science