Qualification > Sciences
ALL PHYSICS DOUBTS - POST HERE !!
Syed Kazim:
--- Quote from: ~VIN1094~ on May 25, 2010, 11:35:32 pm ---OK GUYS IMMA SLEEP NOW !! Its 4 am here !!.. n i need some sleep ..sorry guys if u r questions are pending :(
BEST OF LUCK TO ALL !! :D
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Thanks for your help. :)
Ivo:
--- Quote from: pglasg74 on May 25, 2010, 11:36:57 pm ---
yeah i got that.. how about this one?
The current in a lamp at full brightness is 0.25 A. The flexible cable to the lamp is designed for currents upto 5 A so it can safely carry teh 0.25 taken by the lamp. Which fuse should be inserted in the plug at the other end of the cable?
.. teh answer is 1
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Yes, max. required by lamp is 0.25A, so you select fuse which is the next one up. So 1.5A, is 3A fuse, for example.
pglasg74:
--- Quote from: Ivo on May 25, 2010, 11:36:13 pm ---Excactly, the words in the question say they travel quickly in deeper water, so speed of waves are quicker, wavelength increases, as explained with the formula before.
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ooooo riiiiiiiiight tyyyyy :D so wavelength in shallow is less than wavelength in deep?
pglasg74:
--- Quote from: Syed Kazim on May 25, 2010, 11:39:42 pm ---Thanks for your help. :)
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hey can u explain winter 07 number 21 please?
Ivo:
--- Quote from: pglasg74 on May 25, 2010, 11:43:03 pm ---
ooooo riiiiiiiiight tyyyyy :D so wavelength in shallow is less than wavelength in deep?
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In shallow water, waves travel slowly. Look at the formula v=f(lambda-wavelength). So rearange: wavelength=v/f.
So, if v deceases, and frequency is the same, then wavelengh decresases. Therefore the lines in the diagram get shorter for shallow water. Opposite for deep water. Got it? ;D
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