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Brinda
Brinda
Asked: December 14, 2020In: Class 9 Science

What is the magnitude of the gravitational force between the earth and a 1 kg object on its surface? (Mass of the earth is 6 × 10²⁴ kg and radius of the earth is 6.4 × 10⁶ m).

NCERT Solutions for Class 9 Science Chapter 10 Important NCERT Questions Gravitation NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-143 Questions No-2

2020-2021cbsechapter 10class 9 scienceclass9gravitationncertscience
  • 1 1 Answer
  • 250 Views
  • 6 Votes
Answer
Brinda
Brinda
Asked: December 14, 2020In: Class 9 Science

A 8000 kg engine pulls a train of 5 wagons, each of 2000 kg, along a horizontal track. If the engine exerts a force of 40000 N and the track offers a friction force of 5000 N, then calculate: (a) the net accelerating force; (b) the acceleration of the train; and (c) the force of wagon 1 on wagon 2.

NCERT Solutions for Class 9 Science Chapter 9 Force and Laws of Motion NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-128 Questions No-7

2020-2021cbsechapter 9class 9 scienceclass9force and laws of motionncertscience
  • 1 1 Answer
  • 991 Views
  • 7 Votes
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Brinda
Poll
Brinda
Asked: December 14, 2020In: Class 9 Science

A batsman hits a cricket ball which then rolls on a level ground. After covering a short distance, the ball comes to rest. The ball slows to a stop because

NCERT Solutions for Class 9 Science Chapter 9 Force and Laws of Motion NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-128 Questions No-4

2020-2021cbsechapter 9class 9 scienceclass9force and laws of motionncertscience
  • 1 1 Answer
  • 402 Views
  • 6 Votes
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Brinda
Brinda
Asked: December 14, 2020In: Class 9 Social Science

From a rifle of mass 4 kg, a bullet of mass 50 g is fired with an initial velocity of 35 m s⁻¹. Calculate the initial recoil velocity of the rifle.

NCERT Solutions for Class 9 Science Chapter 9 Force and Laws of Motion NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-126 Questions No-3

2020-2021cbsechapter 9class 9 scienceclass9force and laws of motionncertscience
  • 1 1 Answer
  • 429 Views
  • 7 Votes
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Brinda
Brinda
Asked: December 13, 2020In: Class 9 Science

If the organisation of a cell is destroyed due to some physical or chemical influence, what will happen?

NCERT Solutions for Class 9 Science Chapter 5 The Fundamental Unit of Life NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-65 Questions No-2

2020-2021cbsechapter 5class 9 scienceclass9ncertsciencethe fundamental unit of life
  • 1 1 Answer
  • 263 Views
  • 8 Votes
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Brinda
Brinda
Asked: December 13, 2020In: Class 9 Science

Why are manures and fertilizers used in fields?

NCERT Solutions for Class 9 Science Chapter 15 Important NCERT Questions Improvements in Food Resources NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-214 Questions No-2

2020-2021cbsechapter 15class 9 scienceclass9improvement in food resourcesncertscience
  • 2 2 Answers
  • 132 Views
  • 7 Votes
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Brinda
Brinda
Asked: December 13, 2020In: Class 9 Science

What is immunization?

NCERT Solutions for Class 9 Science Chapter 13 Important NCERT Questions Why Do We Fall Ill NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-187 Questions No-4

2020-2021cbsechapter 13class 9 scienceclass9ncertsciencewhy do we fall ill
  • 1 1 Answer
  • 143 Views
  • 8 Votes
Answer
Brinda
Brinda
Asked: December 13, 2020In: Class 9 Science

Summarize the rules for writing of distribution of electrons in various shells for the first eighteen elements.

NCERT Solutions for Class 9 Science Chapter 4 Structure of the Atom NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-54 Questions No- 6

2020-2021cbsechapter 4class 9 scienceclass10ncertsciencestructure of the atom
  • 1 1 Answer
  • 299 Views
  • 8 Votes
Answer
Brinda
Brinda
Asked: December 12, 2020In: Class 10 Science

Give reasons: We can easily move our hand in air, but to do the same through a solid block of wood, we need a karate expert.

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-6 Questions No:3 Part: d

2020-2021cbsechapter 1class 10 scienceclass10matter in our surroundingsncertscience
  • 2 2 Answers
  • 148 Views
  • 7 Votes
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Brinda
Brinda
Asked: December 12, 2020In: Class 10 Science

Give reasons: A wooden table should be called a solid.

NCERT Solution for Class 9 Science Chapter 1 Matter in Our Surroundings NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-6 Questions No:3 Part: c

2020-2021cbsechapter 1class 10 scienceclass10matter in our surroundingsncertscience
  • 2 2 Answers
  • 157 Views
  • 6 Votes
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