Physics, Chemistry and Biology: Post your doubts here!

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Time delay circuits
As it takes a finite time for a capacitor to charge or discharge, they can be used in time delay circuits. A circuit such as shown below can be used as a prt of burglar alarm or temperature sensor.

capacitor-in-potential-dividor.png
thnk u for this! but wht happens once the capacitor starts to discharge.
 
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A ray moves away from the normal when entering an optically rarer medium from a denser one, right? So why does it move towards the normal when going from deep to shallow water? eureka!
 
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Tips for paper 6 physics !!!! i have done past papers but still could u give me some helpful tips and notes !!!
Use logical explanation, know apparatus, and ways of improving experiments. There are a few experiments you must know, among them are determining the image formed by a lens, period of oscillation, ray diagrams for light and finding position of equilibrium.
 
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