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

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.

0Thank You

Yash Gupta 1 year, 11 months ago

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

0Thank You

ANSWER

Compare between solution suspension and colloid

Posted by Aryan Kumar 1 year, 11 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

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 1 year, 11 months ago

CBSE > Class 09 > Science

1 answers

Aditya Singh Rathore 1 year, 11 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.

0Thank You

ANSWER

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 1 year, 11 months ago

CBSE > Class 09 > Science

3 answers

Niharika Singh 1 year, 11 months ago

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

0Thank You

Tharani Dharan 1 year, 11 months ago

The use the equation mg .

0Thank You

Tharani Dharan 1 year, 11 months ago

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

1Thank You

ANSWER

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 1 year, 11 months ago

CBSE > Class 09 > Science

1 answers

Tharani Dharan 1 year, 11 months ago

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

0Thank You

ANSWER

Define physical education according to Brownell

Posted by Sisodiya Shekhar Sisodiya Shekhar 1 year, 11 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Physical education

Posted by Sisodiya Shekhar Sisodiya Shekhar 1 year, 11 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Differentiate between compost and green manure

Posted by Aahan Mathur 1 year, 11 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

What is the syllabus of ut4 means after term1 exam

Posted by Shreya Pandey 1 year, 11 months ago

CBSE > Class 09 > Science

2 answers

Abhishek Harshit 1 year, 11 months ago

Nervous tissue is a longest tissue

0Thank You

Sunny Yaduvanshi 1 year, 11 months ago

What is nervous tissue

0Thank You

ANSWER

Property of electron

Posted by Ambrish Pandey 1 year, 11 months ago

CBSE > Class 09 > Science

2 answers

Nikhil Bhardwaj 1 year, 10 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

0Thank You

Neeraj Singh 1 year, 11 months ago

1Thank You

ANSWER

What are the steps to do serial reproduction class 9th

Posted by Harshit Vithal Suryavanshi Hvs 1 year, 11 months ago

CBSE > Class 09 > Science

2 answers

Chocolate Boy 1 year, 11 months ago

Atharva........great 💕

1Thank You

Aryan Wadekar 1 year, 11 months ago

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

2Thank You

ANSWER

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

Posted by Armaanjot Sran 1 year, 11 months ago

CBSE > Class 09 > Science

1 answers

Amar Singh 1 year, 11 months ago

गुफ्ब्न्

2Thank You

ANSWER

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 1 year, 11 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Cell organelles

Posted by Miss. Unbelievable 1 year, 11 months ago

CBSE > Class 09 > Science

5 answers

Arpit Kumar 1 year, 11 months ago

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

0Thank You

Saurabh Yadav 1 year, 11 months ago

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

0Thank You

Usha 👩‍🎓 1 year, 11 months ago

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

0Thank You

Ashmita Dadwal 1 year, 11 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

0Thank You

Rohit Luna 1 year, 11 months ago

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

0Thank You

ANSWER

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

Posted by Elangovan Saktheviel 1 year, 11 months ago

CBSE > Class 09 > Science

2 answers

Shubham Kumar Gupta 1 year, 11 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....

1Thank You

Ak Bk 1 year, 11 months ago

Kya hmare aas paas ke padart sud h

0Thank You

ANSWER

Full form of DNA,

Posted by Aaditya Kumar 1 year, 11 months ago

CBSE > Class 09 > Science

4 answers

Amit Kumar 1 year, 11 months ago

Deoxyribo nucleic acid

1Thank You

Shreya Pandey 1 year, 11 months ago

Deoxyribo nucleic acid

2Thank You

Nidhish Yadv 1 year, 11 months ago

Deoxy ribo neuclic acid

1Thank You

Puspendar Baghel 1 year, 11 months ago

Deoxyrebonucleaus acid

2Thank You

ANSWER

A heavy stone is the not pushing it

Posted by Akhilendra Pratap Gopalan Gopalan 1 year, 11 months ago

CBSE > Class 09 > Science

4 answers

Akhilendra Pratap Gopalan Gopalan 1 year, 7 months ago

Area

0Thank You

Saniya Shariff 1 year, 11 months ago

Momentum

1Thank You

Aaditya Kumar 1 year, 11 months ago

Momentum

3Thank You

Akhilendra Pratap Gopalan Gopalan 1 year, 11 months ago

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

0Thank You

ANSWER

Why adipose tissue is a connective tissue?

Posted by Aarush Pal 2 years ago

CBSE > Class 09 > Science

3 answers

Abhishek Sharma 1 year, 11 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

0Thank You

Rohit Luna 1 year, 11 months ago

because it is a connective tissue

0Thank You

Aksha Aksha Saifi 2 years ago

Yes

0Thank You

ANSWER

This content has been hidden. One or more users have flagged this content as inappropriate. Once content is flagged, it is hidden from users and is reviewed by myCBSEguide team against our Community Guidelines. If content is found in violation, the user posting this content will be banned for 30 days from using Homework help section. Suspended users will receive error while adding question or answer. Question comments have also been disabled. Read community guidelines at https://mycbseguide.com/community-guidelines.html

Few rules to keep homework help section safe, clean and informative.

Don't post personal information, mobile numbers and other details.
Don't use this platform for chatting, social networking and making friends. This platform is meant only for asking subject specific and study related questions.
Be nice and polite and avoid rude and abusive language. Avoid inappropriate language and attention, vulgar terms and anything sexually suggestive. Avoid harassment and bullying.
Ask specific question which are clear and concise.

Remember the goal of this website is to share knowledge and learn from each other. Ask questions and help others by answering questions.

Posted by Kanishka Dahiya 1 year, 11 months ago

CBSE > Class 09 > Science

0 answers

ANSWER

Show that : m1u1 + m2u2 = m1v1 + m2v2

Posted by Bhagyadeb Das 2 years ago

CBSE > Class 09 > Science

1 answers

Rohit Luna 1 year, 11 months ago

m1u1+m2u2=m1v1+m2v2: shown

1Thank You

ANSWER

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 2 years ago

CBSE > Class 09 > Science

0 answers

ANSWER

1st law of Newton's force

Posted by Ruchi Chavan 2 years ago

CBSE > Class 09 > Science

2 answers

Aarush Thakur 1 year, 11 months ago

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

0Thank You

Kashak Goyal 2 years 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

2Thank You

ANSWER

What is ICT

Posted by Ruchi Chavan 2 years ago

CBSE > Class 09 > Science