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

Because pressure is inversely proportional tl area and due to a very minute area of tge bullet ...it applies immense pressure upon any object and kills it...another reason is the fast velocity of the bullet which increses its momentum

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Calculate the number of molecule present in 4.4 gm of CO2 [At mass C=124, O=164,N=6.02×10²³ molecule]

Posted by Tanuja Bora 7 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Riya Sharma 7 years, 1 month ago

Yes your question is wrong

0Thank You

Yashwanth R 7 years, 1 month ago

Kindly check your question.

1Thank You

Aarti Sharma 7 years, 1 month ago

Your question is wrong ??

1Thank You

ANSWER

Explain kinds of mechanical energy

Posted by Rajat Singh 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sk Kumar 7 years, 1 month ago

Kinetic energy : the energy possess by a body by virtue of its motion. Potential energy : the energy acquired by a body due to its position and configuration

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A ship sends out ultrasound that returns from the seabed and is detected after 3.42s. If the speed of ultrasound through sea water is 1531m/s, what is the distance of the seabed from the ship

Posted by Aditi Kumari 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sk Kumar 7 years, 1 month ago

261.741m

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Why a desert cooler cools better on hot dry.day

Posted by Shivam Chaudhary 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Rishi Sharma 7 years, 1 month ago

Wrong

1Thank You

Ramesh Kumar 7 years, 1 month ago

A desert cooler cools better on hot dry day because as the humidity decreases the rate of evaporation increases mean that, in the process of evaporation the hot water take heat from adjacent water particles which causes cooling

2Thank You

ANSWER

The number of oxygen atoms in 20g sulphur trioxide (SO3) is the same as those present in'x' gram of ozone. The atomic masses of S and O are 32u and 16u respectively. Find the value of'x'.

Posted by Jaat Chaudhary 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Jaat Chaudhary 7 years, 1 month ago

X=12g..

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Amit Chaudhary 7 years, 1 month ago

4.5#10*23

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ANSWER

Which disease cause damage to our immunity

Posted by Vijay Bisane 7 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Vaidehi Kumari ??? 7 years, 1 month ago

HIV Aids

1Thank You

Aarya Manohare 7 years, 1 month ago

HIV AIDS

0Thank You

Vijay Bisane 7 years, 1 month ago

Aids

2Thank You

ANSWER

Write names of solutions used to stain plant cell and animal cell white making a slide

Posted by Paresh Bhoi 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Ramesh Kumar 7 years, 1 month ago

To dye a plant cell iodine or safrannine To dye animal cell methyline blue

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state 2 differences between leucoplasts and chromo plasts

Posted by Narasappa Chavhan 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sk Kumar 7 years, 1 month ago

Chromoplast has different pigments whereas leucoplast contains nonany pigmant

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Meristematic tissue where they found

Posted by Palvesh Dandre 7 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Prachi Janwani 7 years, 1 month ago

They are found in the growing regions of the plant body like root tips

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Vaidehi Kumari ??? 7 years, 1 month ago

At the internodes and leaves for their growth

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Narasappa Chavhan 7 years, 1 month ago

in growing regions of plant body ,like root tips, stem apex,buds etc

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Ankitha Ankitha 7 years, 1 month ago

Plants

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ANSWER

E. Goldstein discovered protons in which year?

Posted by Sunil Kumar Saren 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Ruma Mondal 7 years, 1 month ago

In 1886 E.Goldstein discovered protons

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Punna Sai Mithun 7 years, 1 month ago

1886

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What is the difference between anxiety and depression?

Posted by Ansari Khan 7 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

Name the particles which determine mass of atom

Posted by Bhadresh B Patel 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Riya Sharma 7 years, 1 month ago

No.of protons + No. Of neutrons

1Thank You

Saket Sankhla 7 years, 1 month ago

Protons and neutrons

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ANSWER

What is the formula to find acceleration

Posted by Poonam Gurjar 7 years, 1 month ago

CBSE > Class 09 > Science

4 answers

Sk Kumar 7 years, 1 month ago

V² - u²/2s

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Vaibhav Singh 7 years, 1 month ago

a=v-u\t

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Chahat Singh 7 years, 1 month ago

Formula to find acceleration is final velocity (v)- initial velocity (u) / time v - u / t

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Saket Sankhla 7 years, 1 month ago

v-u/time

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ANSWER

Explain the production and of sound. With example tu

Posted by Amit Gautam 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Saket Sankhla 7 years, 1 month ago

Sound is produced through vibrations Eg. We talk to each other due to vibrations btw. our vocal cords

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Define conversation of a solution

Posted by Gangadhar Naik 7 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

Why solids is stable but solution is not

Posted by Gangadhar Naik 7 years, 1 month ago

CBSE > Class 09 > Science

0 answers

ANSWER

Write the different between homogenous and hetrogenous solution

Posted by Gangadhar Naik 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Raini Samaiya 7 years, 1 month ago

While heterogeneous are suspensions in which constitutes can be seen easily

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Raini Samaiya 7 years, 1 month ago

A solution is a homogeneous mixture of two or more substances , The constituents of the mixtute can not be seen.

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Why desert cooler cools better on a hot dry day

Posted by Raj Patel 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Himani Saini 7 years, 1 month ago

On a hot and dry day we perspire more it means that more sweat is released from our body and make us feel wet but wearing cotton clothes help us by easily evaporating all our sweat and it takes the heat energy for evaporation from our body thus making us feel cool hope you will like this one

1Thank You

ANSWER

The weight of body on the surface of earth is 392N.What will be the weight of body on the planet who's mass is double that of earth and radius is 4 times of earth

Posted by Harshit Giri 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Sk Kumar 7 years, 1 month ago

1568N

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Write the drawback of nuclear model of an atom

Posted by Kriti Shrivastav 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Saket Sankhla 7 years, 1 month ago

Rutherford told that electrons revolve around the atom. Due to which it loses its energy and would fall on the atom

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What is hotspot

Posted by Vishnu Jha 7 years, 1 month ago

CBSE > Class 09 > Science

2 answers

Khushi Rani 7 years, 1 month ago

It is a device used to share the net pack of one mobile with the other mobile (whether of same modle or not that dosent matters ) so that in both the mobiles net can be used .

1Thank You

Safwan Khan 7 years, 1 month ago

Hotspot is a software which is used to transfer the data

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ANSWER

Water

Posted by #Funny Video Is Back# 7 years, 1 month ago

CBSE > Class 09 > Science

1 answers

Kunal Jadhav 7 years, 1 month ago

Water is a liquid. Water has ability to dissolve any things. It is a wonder liquid.

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What us mean by bioncy

Posted by Peermohamed1515 Peermohamed1515 7 years, 1 month ago

CBSE > Class 09 > Science

3 answers

Prajjwal Upadhyay 7 years, 1 month ago

The force that exerts in upward direction by the water to the object that is in the water

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Khushi Rani 7 years, 1 month ago

It is the upward force acting on an object . Ex , a lotus flower lies on surface with the help of aerenchyma and buoyancy

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Somnath Chand 7 years, 1 month ago

Buoyancy is the upward force exerted by fluid over the surface area of contact of an object which is immersed in fluid. Buoyancy is also known as upward thrust.

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Calculate the molecular mass of CoCo3 and H2So4

Posted by Ashish Singh 7 years, 1 month ago

CBSE > Class 09 > Science