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How was physics paper 4

How was physics paper 4 ?


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Which variant? Mine is 41 and if you are the same then what did you get for the last question on shm? Isn't it prportionality because mass of the oscillating body is not given. I forgot I think it's about EK and speed
 
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for 41 the first question wat was the the ratio of the gravitational field strength of earth and jupiter??
 
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for 41 the first question wat was the the ratio of the gravitational field strength of earth and jupiter??

I put g=GM/r^2 for both of them and cancelled out GM from the ratio as this is constant for both planets. So the ratio turned out to be the ratio of the two radii squared... What did u do there?
 
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yeah i did that too and i got an answer with 5 point something. i just want to verify that if thats correct
 
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How did you guys do the acoustic impedance question last part. Why should high frequency ultrasound be used instead of low frequency?
 
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