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

Health is a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity,and the basic need of health are food (including water), shelter and clothing.

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Prove the second law of equation of motion

Posted by Sachin Kumar 3 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Shital Kumari 3 years, 9 months ago

* s=ut+1/2at^2 Since, average velocity =u+v/2 = u+u+at/2 = 2u+at/2 Distance travelled = speed × time s = v × t = (2u + at/2) × t = 2ut + at^2/2 = 2ut/2 + at^2/2 = ut + 1/2 at^2 ( proved )

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How many grams of potassium chloride is present in 250 gram of saturated solution

Posted by Shravasti Salve 3 years, 9 months ago

CBSE > Class 09 > Science

0 answers

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what is chlorenchyma

Posted by Sanjay Singh 3 years, 9 months ago

CBSE > Class 09 > Science

3 answers

Deepak Singh 9B 3 years, 9 months ago

Chlorenchyma is the part of parenchyma and chlorenchyma contains chlorophyll and this perform photosynthesis

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Pratibha Pramod Pillai 3 years, 9 months ago

Parenchyma with chrlorophyll that aids in photosynthesis is called parenchyma

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Divyashree Bk 3 years, 9 months ago

In some plant parts , parenchyma had chlorophyll and carries out photosynthesis . This type of parenchyma is called as chlorenchyma . Eg : Mesophyll layer in leaves

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A motor car is going with a velocity 10m/s. Motor of the car is 250 kg. Q1. How much force will be applied by the brakes on the car to it at 25m away. Q2. In how much time the car will come to rest by applying above force

Posted by Tanu Som 3 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Tanu Som 3 years, 9 months ago

Now please give me a answer

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I have one question

Posted by Tanu Som 3 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Misha Mahawan 3 years, 9 months ago

Ask

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Which of the following statements is false for a body in motion? a) The object covers equal distances in equal intervals of time, then it is said to be in uniform motion. b) The numerical ratio of displacement to distance for a moving object is always more than 1. c) Velocity-time graph of the body can be parallel to time axis. d) The body can be moving with uniform speed but with acceleration.

Posted by Vinisha Maria Montheiro 3 years, 9 months ago

CBSE > Class 09 > Science

1 answers

K_Hushii 🍁 3 years, 9 months ago

I think option (b) is false

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Define Derivation.

Posted by Varisha Dhiman 3 years, 9 months ago

CBSE > Class 09 > Science

1 answers

Deepak Singh 9B 3 years, 9 months ago

Derivation is derivation ?

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Differences between meristematic and parmanent

Posted by R K 3 years, 9 months ago

CBSE > Class 09 > Science

2 answers

Divyashree Bk 3 years, 9 months ago

Meristematic tissues comprise of immature cells that are in a continuous state of division while the permanent tissues comprise of mature Meristematic cells which lost the ability to divide and transformed into permanent tissues by the process of cell differentiation

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Tanu Som 3 years, 9 months ago

Meristematic tissue Cell is divided and growth of divided cell is permanent tissue Permanent tissue Cell is not divided

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What is the powerhouse of a cell

Posted by Yashraj Singh 3 years, 9 months ago

CBSE > Class 09 > Science

5 answers

Bhagyashri Patkari 3 years, 9 months ago

Mitochondria

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Tanu Som 3 years, 9 months ago

Mitochondria

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Vk Vk 3 years, 9 months ago

Mitochondria

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Vinisha Maria Montheiro 3 years, 9 months ago

Mitochondria

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Kanishk Kumar 3 years, 9 months ago

Mitochondria

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A machine gun fires a bullet of mass 40 g at a speed of 1200m/s. The man holding it can exert a maximum force of 144N on the gun.How many bullet can he fire per second at the most? a) one b) four c) two d) three

Posted by Pranshu Sinha 3 years, 10 months ago

CBSE > Class 09 > Science

2 answers

Pranshu Sinha 3 years, 9 months ago

U are right

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Ritik Si 3 years, 9 months ago

2÷3×6+2-8

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A football player kicks a 350g ball(at rest) and gives it an initial speed of 28m/s. Find the magnitude of average force exerted by the player if the impact time is 12ms.

Posted by Vandana B 3 years, 10 months ago

CBSE > Class 09 > Science

0 answers

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What I'd ill

Posted by Kapil M 3 years, 10 months ago

CBSE > Class 09 > Science

3 answers

Misha Mahawan 3 years, 9 months ago

Mean

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K_Hushii 🍁 3 years, 9 months ago

Question

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Yukti Tandi 3 years, 10 months ago

Matlab kya chahiye

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Science homework

Posted by Barhan Ahmed 3 years, 10 months ago

CBSE > Class 09 > Science

2 answers

K_Hushii 🍁 3 years, 10 months ago

Meter per second ,m/s

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Tanisha Negi 3 years, 10 months ago

What is the unit of velocity

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State the universal law of gravitational

Posted by Nishat Aman 3 years, 10 months ago

CBSE > Class 09 > Science

2 answers

Deepika Mb 3 years, 10 months ago

Every body in the universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

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Barhan Ahmed 3 years, 10 months ago

Barhan Ahmed

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Explain third law of newton

Posted by Ishani Patel 3 years, 10 months ago

CBSE > Class 09 > Science

5 answers

Ravidutt Sharma 3 years, 9 months ago

The Newton's third law explain we that's like we force on a table of 5 Newtons so that table also will will force on in our hand 5 N show the third law of Newton explain for every action there is equals and opposite reaction v force on table 5 Newton and table will be force on also 5 Newton so that's the Newton's third law explain with this

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Aman Harsh 3 years, 9 months ago

In third law of motion, no time delay mean if you give action currently give you reaction

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Suhas Suvi 3 years, 10 months ago

for every action there is a equal and opposite reaction

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Gaurav Tripathi 3 years, 10 months ago

In states that, whenever one object exerts a force on another object, then the second object exerts an equal and opposite force on the first object.

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Supreet Kaur Supreet Kaur 3 years, 10 months ago

Newton's third law states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction. The third law is also known as the law of action and reaction. ... If a body has a net force acting on it, it undergoes accelerated motion in accordance with the second law.

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-:In mitosis, Number of chromosomes in mother cell are equal to the ____________ In daughter cell.

Posted by Manoj Mishra 3 years, 10 months ago

CBSE > Class 09 > Science

1 answers

K_Hushii 🍁 3 years, 10 months ago

After mitosis the chromosomes no. of a daughter cell is double compared to that of parent cell .the parent cell has 23 pairs of chromosomes (one set from mother and one set from father) 46 chromosomes

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-: Cell division is also known as?

Posted by Manoj Mishra 3 years, 10 months ago

CBSE > Class 09 > Science

2 answers

Manoj Mishra 3 years, 9 months ago

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K_Hushii 🍁 3 years, 10 months ago

Mitosis

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Define atomicity? Explain 2 example

Posted by Priyanshi Bhardwaj 3 years, 10 months ago

CBSE > Class 09 > Science

1 answers

Supreet Kaur Supreet Kaur 3 years, 10 months ago

Atomicity is defined as the total number of atoms present in a molecule. For example, each molecule of oxygen (O2) is composed of two oxygen atoms. So atomicity of oxygen is 2. In older contexts, atomicity is sometimes used in the same sense as valency

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Factory of ribosome?

Posted by Prince Kumar 3 years, 10 months ago

CBSE > Class 09 > Science

1 answers

K_Hushii 🍁 3 years, 10 months ago

The factory of ribsomes is nucelous .nucelous is found in the nucleus of eukaryotic cells . it is best known as site of ribsomes biogenesis.it is a responsible for ribosomal RNA synthesis , its processing and ribosomal subunit assembly

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Kitchen of a cell is

Posted by Mehak Gill 3 years, 10 months ago

CBSE > Class 09 > Science