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CBSE Class 9 Answered

Hello sir/madam,  My annual exam is nearby and for me, every chapter is coming for the exam. I just wanted to know the important diagrams from each chapter which can come for the exam. *Please give the diagrams from each chapter*
Asked by prakash.sanyasi | 14 Feb, 2020, 07:14: PM
answered-by-expert Expert Answer
For Physics below are the diagrams you must know from respective chapters -
Chapter 8 -Motion :
From this chapter, you must know distance -time graphs and velocity time graphs, how to plot the graphs, writing scale, reading data from the given graph and calculating the value of entity from the given graph. 
Chaptet 9 - force and laws of motion 
In this chapter, there no important diagrams as such but you should know diagram for the derivation of conservation of momentum. You must show arrows of bodies before and after collision properly. You can loose marks if arrows are not shown properly.
Chaptet 10 - Gravitation 
Diagram for deriving formula for universal law of gravitation which the gravitation between two bodies which are at distance say r from each other ( here too, the direction of arrows is important) and diagram for Archimedes' principle 
Chapter 11 - Work energy and power 
No important diagrams for this chapter. 
Chaptet 12 -Sound
Diagram of wave showing wavelength, amplitude, compression rarefactions, crest and trough
Bell jar experiment diagram
Graph of sound propagation due to variations in density and pressure of medium
Reflection of sound 
Reflection of ultrasound waves from defective locations of metal block
Auditory parts of human ear
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