Tiwari Academy Discussion

Asked: October 28, 2020In: Class 9

A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.

NCERT Solutions for Class 9 Science Chapter 12 Important NCERT Questions Sound NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-175 Questions No-20

Bhumi Srivastava

Asked: October 28, 2020In: Class 9

Explain how defects in a metal block can be detected using ultrasound.

NCERT Solutions for Class 9 Science Chapter 12 Important NCERT Questions Sound NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-175 Questions No-21

Rudra Rustagi

Asked: October 28, 2020In: Class 9

What do you mean by acceleration due to gravity?

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-136 Questions No-2

Rudra Rustagi

Asked: October 28, 2020In: Class 9

What are the differences between the mass of an object and its weight?

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-1

Rudra Rustagi

Asked: October 28, 2020In: Class 9

Why is the weight of an object on the moon one-sixth 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

Rudra Rustagi

Asked: October 28, 2020In: Class 9

Why is it difficult to hold a school bag having a strap made of a thin and strong string?

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-1

Rudra Rustagi

Asked: October 28, 2020In: Class 9

What do you mean by buoyancy?

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

Rudra Rustagi

Asked: October 28, 2020In: Class 9

Why does an object float or sink when placed on the surface of water?

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-3

Rudra Rustagi

Asked: October 28, 2020In: Class 9

You find your mass to be 42 kg on a weighing machine. Is your mass more or less than 42 kg?

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-142 Questions No-1

karin joseph

Asked: October 28, 2020In: Class 9

You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured on a weighing machine. In reality, one is heavier than other. Can you say which one is heavier and why?

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-142 Questions No-2

A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.

Explain how defects in a metal block can be detected using ultrasound.

What do you mean by acceleration due to gravity?

What are the differences between the mass of an object and its weight?

Why is the weight of an object on the moon one-sixth its weight on the earth?

Why is it difficult to hold a school bag having a strap made of a thin and strong string?

What do you mean by buoyancy?

Why does an object float or sink when placed on the surface of water?

You find your mass to be 42 kg on a weighing machine. Is your mass more or less than 42 kg?

You have a bag of cotton and an iron bar, each indicating a mass of 100 kg when measured on a weighing machine. In reality, one is heavier than other. Can you say which one is heavier and why?

Which is the best website providing NCERT Solutions?

NCERT Books

Where can I get NCERT books in PDF format?

NIOS

NCERT Solutions

Sign Up

Sign In

Forgot Password

Tiwari Academy Discussion Latest Questions