ashwin99

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

9 PhysicsMaster

Asked: December 14, 2020In: Class 9 Science

Why is the weight of an object on the moon 1/6 th its weight on the earth?

NCERT Solutions for Class 9 Science Chapter 10 Important NCERT Questions Gravitation NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-138 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

Gargi

Asked: November 24, 2020In: Class 7 Science

Which type of lens forms always a virtual image?

NCERT Solutions for Class 7 Science Chapter 15 Important NCERT Questions 7th Chapter 15 Light NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 10

Gargi

Asked: November 24, 2020In: Class 7 Science

Which type of mirror can form a real image?

NCERT Solutions for Class 7 Science Chapter 15 Important NCERT Questions 7th Chapter 15 Light NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 9

Gargi

Asked: November 24, 2020In: Class 7 Science

Give one use each of a concave and a convex mirror.

NCERT Solutions for Class 7 Science Chapter 15 Important NCERT Questions 7th Chapter 15 Light NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 8

Gargi

Asked: November 24, 2020In: Class 7 Science

State two differences between a convex and a concave lens.

NCERT Solutions for Class 7 Science Chapter 15 Important NCERT Questions 7th Chapter 15 Light NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 7

Gargi

Asked: November 24, 2020In: Class 7 Science

What is a virtual image? Give one situation where a virtual image is formed.

NCERT Solutions for Class 7 Science Chapter 15 Important NCERT Questions 7th Chapter 15 Light NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 6

Gargi

Asked: November 24, 2020In: Class 7 Science

Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.

NCERT Solutions for Class 7 Science Chapter 15 Important NCERT Questions 7th Chapter 15 Light NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 5

Gargi

Asked: November 24, 2020In: Class 7 Science

State the characteristics of the image formed by a plane mirror.

NCERT Solutions for Class 7 Science Chapter 15 Important NCERT Questions 7th Chapter 15 Light NCERT Books for Session 2022-2023 CBSE Board and State Board Questions No: 4

ashwin99

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).

Why is the weight of an object on the moon 1/6 th its weight on the earth?

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.

Which type of lens forms always a virtual image?

Which type of mirror can form a real image?

Give one use each of a concave and a convex mirror.

State two differences between a convex and a concave lens.

What is a virtual image? Give one situation where a virtual image is formed.

Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.

State the characteristics of the image formed by a plane mirror.

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