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

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

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

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

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

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

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

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

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

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

Brinda

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).

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.

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

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

Why are manures and fertilizers used in fields?

What is immunization?

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

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.

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

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