Biology; Chemistry; Physics: Post your doubts here!

[peacce]

That's great
I've to go now. Take Care. Wish you all the best. Please remember me in your prayers as well

rem me too A.H

 

[Laibaaa]

That's great
I've to go now. Take Care. Wish you all the best. Please remember me in your prayers as well

Take care and best of luck, thanks for the help again. And ofcourse I will ^.^ please remember me too, anyway good night!

 

[Laibaaa]

rem me too A.H

Lets all remember everyone I'A it'll be great. Please pray everyone

 

[***amd***]

whats a time delay circuit? .-.

 

[Amen Azeem]

HOW TO FIND THE HORIZONTAL FORCE OF M IN QUESTION 1 ???

 

[***amd***]

HOW TO FIND THE HORIZONTAL FORCE OF M IN QUESTION 1 ???

image isnt visible

 

[Dark Destination]

Radioactivity :/

 

[Laibaaa]

 

[***amd***]

Radioactivity :/

read it from those notes i gave u, it wont take more than aan hr, in shaa Allah.

lol, kiya hua?

 

[Dark Destination]

May be stupid. But what happens when a charged insulator MEETS a uncharged conductor (touches)? Insulator gets discharged while conductor gets charged?

What happen viceversa (conductor is charged)?

Yes, charges are transferred and insulator gets discharged.

 

[Dark Destination]

Also - whats the diff b/w Fleming LHR and RHR? Don't have noted on Left Hand Is it applied on AC generator? Same finger directions?

Left Hand Rule is used to find direction of Force in DC motors.
And RHR is used to find direction of induced current in AC generators.

 

[Laibaaa]

read it from those notes i gave u, it wont take more than aan hr, in shaa Allah.

lol, kiya hua?

Bas kuch nai horaha.

 

[***amd***]

Give me the notes pleeeeez.

http://www.mediafire.com/?4swx16axdky43

 

[Dark Destination]

http://www.mediafire.com/?4swx16axdky43

Have you looked at the syllabus? There are some things which i can't find anywhere :/
Time delay circuits. Stopping distance, thinking distance. Star formation.

 

[Dark Destination]

No other difference right?

RHR uses right hand. LHR uses Left hand

 

[Dark Destination]

I'm skipping Electronic Systems chapter, as it's optional. ._.
Is that a good idea?

 

[Dark Destination]

Time delay circuit is the circuit with a capacitor.
When a driver sees a child ahead (suppose), the amount of time it takes for him to react and touch the pedal is thinking distance. Then the amount of distance travelled while the break is applied is BRAKING distance

Yes, i know a capacitor is used in time delay circuits, but how? What does it do?
Do we need to know the working of that circuit? I haven't seen that circuit anywhere :/

Where did you study that from?

 

[***amd***]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_s13_qp_12.pdf
Q13 :/

 

[***amd***]

How are new stars formed?

Stars form when clouds of hydrogen come together because of gravity. As these clouds become more and more dense, they start to spiral inward and the temperature rises enormously. Gravity eventually compresses the hydrogen so much that the temperature reaches about 15 million degree centigrade. At this tempeature, nuclear fission starts and star is born.

[[From my teachers' note. He said this is enough - only star formation can be asked]]

fission or nuclear *fusion*?

 

[Dark Destination]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Physics (5054)/5054_s13_qp_12.pdf
Q13 :/

B?