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IMPROVEMENT IN FOOD RESOURCES-Notes
Improvement in Crop Yields To feed a growing population, it is not enough to increase the area under cultivation—we m...
SOUND-Exercise
Q1. What is sound and how is it produced? Solution: Sound is a form of energy that travels in the form of vibrations through a med...
SOUND-QnA
Sound is one of the most fascinating topics in Physics, helping us understand how vibrations travel through different media to create hearing sensations. In this collection of Class 9 NCERT-based Ques...
SOUND-True/False
Strengthen your grasp of NCERT Class 9 Science Chapter 11 "Sound" with these 25 well-crafted True/False questions. Designed for practice and revision, these questions cover every core concept from sou...
SOUND-MCQs
Prepare thoroughly for NCERT Class IX Science Chapter 11 "Sound" with this expertly designed set of 50 MCQs. These multiple-choice questions cover every important topic, from the basics of sound produ...
SOUND-Notes
SOUND Sound is a form of energy that is produced when objects vibrate and transmit their energy through a medium such as a...
WORK AND ENERGY-Exercise
Q1. Look at the activities listed below. Reason out whether or not work is done in the light of your understanding of the term ‘work’. ...
WORK AND ENERGY-QnA
Work and Energy form the foundation of understanding motion, force, and power in physics. This chapter explains how work is done, how energy changes from one form to another, and how the law of conser...
WORK AND ENERGY-True/False
Understanding Work and Energy is a key part of the NCERT Class 9 Science syllabus. This chapter explores how force causes displacement, how energy transforms from one form to another, and the principl...
WORK AND ENERGY-MCQs
The chapter “Work and Energy” introduces students to two of the most fundamental concepts in Physics. It explains how work is done when a force causes displacement and connects it with the concept...
WORK AND ENERGY-Notes
Work work is said to be done when a force is applied on an object and that object moves in the direction of ...
GRAVITATION-Exercise
Q1. How does the force of gravitation between two objects change when the distance between them is reduced to half? Solution: When...