bittu45

Asked: October 30, 2020In: Class 9

For increasing production, what is common in poultry, fisheries and bee-keeping?

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-215 Questions No-8

Ishanvi Batra

Asked: October 30, 2020In: Class 9

How do you differentiate between capture fishing, mariculture and aquaculture?

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-215 Questions No-9

Anirudh Kumar

Asked: October 30, 2020In: Class 9

What do we get from cereals, pulses, fruits and vegetables?

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 Intext Questions Page No-204 Questions No-1

Ishanvi Batra

Asked: October 30, 2020In: Class 9

Explain any one method of crop production which ensures high yield.

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-1

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

Arush Kumar

Asked: October 28, 2020In: Class 9

The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?

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-174 Questions No-9

Arush Kumar

Asked: October 28, 2020In: Class 9

Does sound follow the same laws of reflection as light does? Explain.

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-174 Questions No-10

Arush Kumar

Asked: October 28, 2020In: Class 9

When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day?

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-174 Questions No-11

Arush Kumar

Asked: October 28, 2020In: Class 9

Give two practical applications of reflection of sound waves.

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-174 Questions No-12

Bhumi Srivastava

Asked: October 28, 2020In: Class 9

A stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top? Given, g = 10 m s^–2 and speed of sound = 340 m s^–1.

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-174 Questions No-13

bittu45

For increasing production, what is common in poultry, fisheries and bee-keeping?

How do you differentiate between capture fishing, mariculture and aquaculture?

What do we get from cereals, pulses, fruits and vegetables?

Explain any one method of crop production which ensures high yield.

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

The frequency of a source of sound is 100 Hz. How many times does it vibrate in a minute?

Does sound follow the same laws of reflection as light does? Explain.

When a sound is reflected from a distant object, an echo is produced. Let the distance between the reflecting surface and the source of sound production remains the same. Do you hear echo sound on a hotter day?

Give two practical applications of reflection of sound waves.

A stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top? Given, g = 10 m s^–2 and speed of sound = 340 m s^–1.

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