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ALL CIE PHYSICS DOUBTS HERE !!!

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missbeautiful789:
An acceleration of 20m/s!! down  :o, that should've raised a few flags. Its falling at twice g !!!  ::)

Thanks for that DK
+rep

Deadly_king:

--- Quote from: Salahuddin_Ansari on October 31, 2010, 04:52:27 pm ---An acceleration of 20m/s!! down  :o, that should've raised a few flags. Its at falling twice g  ::)

Thanks for that DK
+rep

--- End quote ---

Hehe.............i guess you were not very attentive. Otherwise you would have noticed your mistake right away ;)

No problem dear............just doing my job :)

WARRIOR:
hello guys !
!
I need some notes on resolving vectors along wth questions and answers !

i have a test tomorrow !

sorry for the short notice~

Dania:
Can someone please help me on this question on stationary waves. It's no. 4 (c)
Refer to the attached pdf.

Deadly_king:

--- Quote from: Dania on November 04, 2010, 09:26:50 pm ---Can someone please help me on this question on stationary waves. It's no. 4 (c)
Refer to the attached pdf.

--- End quote ---

Sound with lowest frequency is produced => An antinode is found at the end of the tube and it is the only one.

Hence there should be a node at the piston. Distance between a node and the consecutive antinode is given to be lamda/4

Lambda/4 = 45 cm -----> lambda is given to be 180cm = 1.8m

V = f x lambda

Therefore f = v/lambda = 330/1.8 = 180 Hz

Frequency is given to the nearest tenth since v = 330 and lambda=1.8 (nearest 10)

Hope it helps :)

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