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Author Topic: ALL CIE PHYSICS DOUBTS HERE !!!  (Read 176254 times)

Offline ashwinkandel

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #855 on: October 19, 2011, 04:20:50 pm »
@astarmathsandphysics 1.pdf is the same file which you had attached as a solution for the previous question above some posts.
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Offline astarmathsandphysics

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #856 on: October 19, 2011, 04:55:01 pm »
ANTHER 1
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Offline cs

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #857 on: October 20, 2011, 03:49:10 pm »
need help again :)
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Offline NidZ- Hero

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #858 on: October 20, 2011, 06:46:47 pm »
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Offline astarmathsandphysics

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #859 on: October 20, 2011, 07:00:54 pm »
here
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Offline astarmathsandphysics

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #860 on: October 20, 2011, 07:07:28 pm »
he difference between successive dots is 25cm
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Offline cs

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #861 on: October 21, 2011, 02:08:10 am »
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Offline cs

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #862 on: October 21, 2011, 06:11:03 am »
another one Thank You
« Last Edit: October 21, 2011, 07:51:26 am by cs »
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Offline astarmathsandphysics

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #863 on: October 21, 2011, 11:23:41 am »
Can't see picture on my phone. Will answer tonight.
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Offline ashwinkandel

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #864 on: October 22, 2011, 06:32:24 am »
Waves:

Q1.Explain why in the remote mountainous regions, such as the Hindu Kush, radio signals from terrestrial transmitters can be received, but television reception can only be received from satellite transmission.

Q2.Damita and Jamal are organizing a disco. Damita suggests that feeding the sound from the music center to a second loudspeaker will increase the loudness of the music. Jamal says it won't work as there will be places where the sound will be loud, due to constructive interference, and places where it will be much quieter due to destructive interference. State who is correct and explain your working.
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Offline cs

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #865 on: October 22, 2011, 07:38:54 am »
what is the uses of Geostationary and Polar-Orbiting Satellites

-weather monitoring
-communication

is it the same for both of them?
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Offline astarmathsandphysics

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #866 on: October 22, 2011, 07:52:33 am »
17.7 MeV is deducted because it represents mass changed into energy so is a loss of mass.
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Offline astarmathsandphysics

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #867 on: October 22, 2011, 07:57:46 am »
Q1. If wavelength is about the same size as a mountain as for radio waves the wave will be diffracted by the mountain and heard behind it.
Q2.I think the second is correct. both types of interference will occur alongs lines starting midway between the sources, but if they are placed next to each other they will act more like a single loudspeaker and this will be reduced.
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Offline astarmathsandphysics

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #868 on: October 22, 2011, 08:05:25 am »
tv, communications and weather satellites only use geostationary orbits.
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Offline minicooper

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Re: ALL CIE PHYSICS DOUBTS HERE !!!
« Reply #869 on: October 26, 2011, 08:55:28 am »
Hi!

AS Physics doubts:

What do I need to know about viscuous drag for AS level? What is its relation to upthrust and weight and is it equal to air resistance?

How do you derive the equation E=1/2mv*2 (I don't know how to write v squared here)?

Also, how do you "Derive, using Kirchhoff's laws, a formula for the combined
resistance of two or more resistors in series and in parallel"?

Thanks, would really appreciate it. :)
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