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On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects. At Earth's surface the acceleration of gravity is about 9.8 metres (32 feet) per second per second.

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Yash Gupta 3 years, 4 months ago

When Two Objects Are Attract Each Other Is Known As Gravity Or Gravitational Force

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Compare between solution suspension and colloid

Posted by Aryan Kumar 3 years, 4 months ago

CBSE > Class 09 > Science

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A uniform cube of edge l 5cm and mass 5kg is kept on a table top .find the pressure due to cube on the table top on the portion where the cube touches the table top

Posted by Ishu Chaudary 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Aditya Singh Rathore 3 years, 4 months ago

Use app Login Question A block of wood is kept on table top. The mass of wooden block is 5 kg and its dimensions are 40cm×20cm×10cm. Find the pressure exerted by the wooden block on the table top, if it is made to lie on the table top with its sides of dimensions (a) 20cm×10cm and (b) 40cm×20cm A (a) P=2440Nm−2 (b) P=610.5Nm−2 B (a) P=2450Nm−2 (b) P=612.5Nm−2 C (a) P=2460Nm−2 (b) P=618.5Nm−2 D (a) P=2470Nm−2 (b) P=712.5Nm−2 Easy Open in App Solution Verified by Toppr Correct option is B) Mass of the wooden block, m=5kg Thrust due to wooden block, Mg=5kg×9.8ms−2=49N (a) Surface area of 20cm×10cm surface, A=(20×10)cm2 =(0.2×0.1)m2 =0.02m2 P=Amg P=0.02m249N=0.0249Nm−2 or Pressure, P=2450Nm−2. (b) Surface area of 40cm×20cm surface, A=(40×20)cm2 =(0.4×0.2)m2=0.08m2 P=0.08m249N=0.0849Nm−2 or Pressure, P=612.5Nm−2.

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A man weight 60N on earth if g is 10 meter per second.what is his mass on moon .on moon his weight would be 10 N.What is acceleration due to gravity on moon

Posted by Tanushree Bhawar 3 years, 4 months ago

CBSE > Class 09 > Science

3 answers

Niharika Singh 3 years, 4 months ago

1.67m/s² will be the acceleration due to the gravitational force on the moon.

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Tharani Dharan 3 years, 4 months ago

The use the equation mg .

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Tharani Dharan 3 years, 4 months ago

Acceleration on moon would be 1/6 th of g.

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In a tug of war between boys and girls , boys won, did the boys pull the rope with greater force as compared to girls ? Explain

Posted by Parul Sahu 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Tharani Dharan 3 years, 4 months ago

Yes. The net force is is inthe direction of boys as they applied more force than girls .

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Define physical education according to Brownell

Posted by Sisodiya Shekhar Sisodiya Shekhar 3 years, 4 months ago

CBSE > Class 09 > Science

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Physical education

Posted by Sisodiya Shekhar Sisodiya Shekhar 3 years, 4 months ago

CBSE > Class 09 > Science

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Differentiate between compost and green manure

Posted by Aahan Mathur 3 years, 4 months ago

CBSE > Class 09 > Science

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What is the syllabus of ut4 means after term1 exam

Posted by Shreya Pandey 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Abhishek Harshit 3 years, 4 months ago

Nervous tissue is a longest tissue

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Sunny Yaduvanshi 3 years, 4 months ago

What is nervous tissue

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Property of electron

Posted by Ambrish Pandey 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Nikhil Bhardwaj 3 years, 3 months ago

Electrons are the fundamental subatomic particles. Electrons revolve around the nucleus in the fixed orbits. Electron can be represented as e or e- An electron has a definite mass and it carries a definite electric charge. The mass of an electron has been found to be 1/1840 of mass of hydrogen, so it is treated as negligible. An electron carries one unit of negative charge whose magnitude is equal to 1.602 x 10-19 Coulombs

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Neeraj Singh 3 years, 4 months ago

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What are the steps to do serial reproduction class 9th

Posted by Harshit Vithal Suryavanshi Hvs 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Chocolate Boy 3 years, 4 months ago

Atharva........great 💕

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Aryan Wadekar 3 years, 4 months ago

First put your ***** in ****** and do back and forward the process will start

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A molecule can be define as the practice of an _or a_

Posted by Armaanjot Sran 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Amar Singh 3 years, 4 months ago

गुफ्ब्न्

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During first half of a journey a body travel with a speed of articuno per hour and in the next half its travel with the speed of 20 km per hour calculate the average speed of whole journey.

Posted by Shreyansh Saxena 3 years, 4 months ago

CBSE > Class 09 > Science

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Cell organelles

Posted by Miss. Unbelievable 3 years, 4 months ago

CBSE > Class 09 > Science

5 answers

Arpit Kumar 3 years, 3 months ago

These are the main cell organelles:- 1. Lysosomes 2. Endoplasmic reticulum 3.golgi apparatus 4.plastids 5.mitochondria 6.vacoules

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Saurabh Yadav 3 years, 4 months ago

The substances which found inside the cell in cytoplasm is known as cell organelles

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Usha 👩‍🎓 3 years, 4 months ago

Golgi apparates, nucleus ,vacuels plastids,mitochondria, endoplasmic reticulum ,cell wall in plant cell

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Ashmita Dadwal 3 years, 4 months ago

There are 8 cell organelles 1.Endoplasmic Reticulum (rough endoplasmic reticulum,smooth endoplasmic reticulum ) 2.Golgi Apparatus 3.Lysosomes 4.Mitochondria 5.Plastids 6.Vacuoles 7.Ribosomes 8.centriole

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Rohit Luna 3 years, 4 months ago

ER, RER, SER, GOLGI, APARTER PLASTIDS, VACUOLS, LYSOSOMES, MITOCHONDRIA,

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Show how weight of an object in moon is 1/6the weight of an object in earth

Posted by Elangovan Saktheviel 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Shubham Kumar Gupta 3 years, 4 months ago

Suppose we have an object of mass 'm'. Let its weight on the moon be 'Wm'. Again suppose that the mass of the moon is 'M' and its radius is a 'R'. Now, according to universal law of gravitation, the weight (force) of the object on the moon will be : Wm = (G × M × m)/R². This is the calculation of the force by which the moon attract any object. Suppose the weight of the same object on the earth be 'We'. Now, we know that the mass of the earth is 100 times that of the moon, and the radius of the earth is 4 times that of the moon. Thus, if mass of moon is 'M', then the mass of the earth will be '100M'; and if radius moon be 'R', then the radius of earth will be '4R'. Now, taking the mass of earth as '100M' and radius of earth as '4R', and applying universal law of gravitation, the weight of object on the earth will be : We = (G × 100M × m)/(4R)² = (G × 100M × m)/16R². Now, dividing the Weight of the moon (Wm) by Weight of the earth (We), we get: Wm/We = (G × M × m × 16R²)/(R² × G × 100M × m) ; Wm/We = 16/100 ; Wm/We = ⅙ ; Wm = ⅙ of We. DERIVED....

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Ak Bk 3 years, 4 months ago

Kya hmare aas paas ke padart sud h

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Full form of DNA,

Posted by Aaditya Kumar 3 years, 4 months ago

CBSE > Class 09 > Science

4 answers

Amit Kumar 3 years, 4 months ago

Deoxyribo nucleic acid

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Shreya Pandey 3 years, 4 months ago

Deoxyribo nucleic acid

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Nidhish Yadv 3 years, 4 months ago

Deoxy ribo neuclic acid

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Puspendar Baghel 3 years, 4 months ago

Deoxyrebonucleaus acid

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A heavy stone is the not pushing it

Posted by Akhilendra Pratap Gopalan Gopalan 3 years, 4 months ago

CBSE > Class 09 > Science

4 answers

Akhilendra Pratap Gopalan Gopalan 3 years ago

Area

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Saniya Shariff 3 years, 4 months ago

Momentum

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Aaditya Kumar 3 years, 4 months ago

Momentum

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Akhilendra Pratap Gopalan Gopalan 3 years, 4 months ago

1.Inertia 2.momentum 3.area 4.None of these

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Why adipose tissue is a connective tissue?

Posted by Aarush Pal 3 years, 4 months ago

CBSE > Class 09 > Science

3 answers

Abhishek Sharma 3 years, 4 months ago

Adipose is a connective tissue because it stores fat and fat got stored in tissue and in that tissue it is stored is known.as connective

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Rohit Luna 3 years, 4 months ago

because it is a connective tissue

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Aksha Aksha Saifi 3 years, 4 months ago

Yes

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Show that : m1u1 + m2u2 = m1v1 + m2v2

Posted by Bhagyadeb Das 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Rohit Luna 3 years, 4 months ago

m1u1+m2u2=m1v1+m2v2: shown

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A rifle of mass 3kg fires a bullet of mass 0.03kg . The bullet leaves the barrel of the rifle at a velocity 150m/s . If the bullet takes 0.003second to move through its barrel, then calculate the force experienced by the rifle due to its recoil.

Posted by Bhagyadeb Das 3 years, 4 months ago

CBSE > Class 09 > Science

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1st law of Newton's force

Posted by Ruchi Chavan 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Aarush Thakur 3 years, 4 months ago

(Easy words) It States that every body wants to be at rest until external force is not applied.

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Kashak Goyal 3 years, 4 months ago

Newton's first law of motion state that when an object at rest will remain in rest and an object in motion will continue in motion with the uniform speed unless it is compelled by the external force to change the state of rest or of uniform motion

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What is ICT

Posted by Ruchi Chavan 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Kashak Goyal 3 years, 4 months ago

ICT means information communication technology

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What is byouncy

Posted by Raj Kasoriya 3 years, 4 months ago

CBSE > Class 09 > Science

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Which of the following is 0 when it has a balance force

Posted by T T 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Mohit Chhabra 3 years, 4 months ago

No, if a both directions are equal force is called balance

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Give reason Rusting of iron is a chemical change

Posted by Koyalkar Jatin 3 years, 4 months ago

CBSE > Class 09 > Science

2 answers

Vineet Yadav 3 years, 4 months ago

Rusting of iron is chemical change because it is irreversible

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Dhruv Sharma 3 years, 4 months ago

Rusting of iron is chemical change because it is irreversible

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What happen if apical meristem is damage or cut?

Posted by Pandey Ji 3 years, 4 months ago

CBSE > Class 09 > Science

1 answers

Kanishka Dahiya 3 years, 4 months ago

Apical meristem are present at the tip of roots and shoots . They form the growing parts of the roots and stems. If they are damaged or cut , the growth in length of that part will cease to occur.

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Name the state of matter that has a minimum inter particles force of attraction

Posted by Muskan Yadav 3 years, 4 months ago

CBSE > Class 09 > Science