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Subject: Physics, asked on 1 day, 20 hours ago
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Subject: Physics, asked on on 27/6/19
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Subject: Physics, asked on on 7/3/18


1. THE RATIO OF AMPLITUDES OF Two WAVES IS 3.4 .WHAT IS THE RATIO OF THEIR:  
a) loudness b) frequencies 
2. STATE Two WAYS IN WHICH THE FREQUENCY OF TRANSVERSE VIBRATIONS OF A STRETCHED STRING CAN BE INCREASED?
3. WHAT IS MEANT BY NOISE POLLUTION? NAME ONE SOURCE OF SOUND CAUSING NOISE POLLUTION? 
4. A STONE OF MASS m IS ROTATED IN A CIRCULAR PATH WITH A UNIFORM SPEED BY TYING A STRONG STRING WITH THE HELP OF YOUR HAND ANSWER THE FOLLOWING QUESTIONS:  
a)is the Stone moving in uniform or variable speed? 
b)is the stone moving with uniform acceleration?in which direction does the acceleration act? 
c) what kind of forces act on the Stone and also state its direction. 
5. a)WHAT AN ECHO? (3) 
b).STATE TWO CONDITIONS FOR AN ECHO TO TAKE PLACE. 
6. a)NAME THE PHENOMENON INVOLVED IN TUNING A RADIO SET TO A PARTICULAR 
B) DEFINE THE PHENOMENON NAMED BY you IN PART A ABOVE. 
C) WHAT DO you UNDERSTAND BY LOUDNESS OF SOUND? 
D) WHICH uNlTS IS THE LOUDNESS OF SOUND MEASURED? 
7. DEFINE THE UNIT OF FORCE. 
8. WHAT ARE THE TWO CONDITIONS THAT MUST BE SATISFIED FOR A BODY TO BE IN 
9. DEFINE MOMENT OF FORCE AND STATE ITS SI UNIT.
10 A UNIFORM BAR IS SUPPORTED AT THE MIDDLE POINT BY A FULCRUM A WEIGHT OF 40 GF IS PLACED AT A POINT OF 40 CM TO THE LEFT OF THE FULCRUM.HOW CAN you BALANCE THE BAR WITH A WEIGHT OF 80 GF?  
11. A UNIFORM METRE RULE OF MASS 100 G IS BALANCED ON A FULCRUM AT 40 CM MARK BY SUSPENDING AN UNKNOWN MASS "L" AT THE 20 CM MARK.  
i)find the value of "L" 
ii)to which side will the rue tilt if the mass "L" is moved to mark 10 cm? 
iii)what is the resultant moment now? 
iv)how can it be balanced by another mass of 50 g? 
12. WHAT THE POSITION OF CENTRE OF GRAVITY OF A i)solid cone ii)triangular lamina.
13. WHAT DO you MEAN BY SUBJECTIVE NATURE OF LOUDNESS AND OBJECTIVE NATURE OF INTENSITY?
14. STATE TWO FACTORS AFFECTING THE LOUDNESS OF A SOUND AND ALSO STATE HOW DOES IT DEPENDS?
15. WHEN A TROOP CROSSES A SUSPENSION BRIDGE THE SOLDIERS ARE ASKED TO BREAKS STEPS. WHY?
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Subject: Physics, asked on on 5/9/18
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Subject: Physics, asked on on 30/3/19
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