ICSE − Q & A

Can anyone explain the concept of energy-sharing between pendulums of same length in the forced and resonant frequency experiment?(concise pg 160)
are they in phase or out of phase?

+ 2 more questions by akhooda  

Why amplitude is more when forced vibrations' frequency matches natural frequency(i.e. resonance)?
asked by Anurag Hooda (akhooda) 7 years ago
1

In concise physics it is written that one can prove Newton's first and third laws of motion using his second law. I can prove the first one. Can anyone tell me how to prove the third law?
asked by Anurag Hooda (akhooda) 7 years ago
1

1. A current of 4A flows through 12V bulb for 10 mins. how much energy transfer takes place?
2.a light mass n heavy mass have same momentum. which has more ke ?
3.expression connecting resistance n resistivity of a conducting wire. state the meaning of symbols used.
4.why are passengers made to occupy the lower deck of a double decker bus first?

Someone verify this please (this is very much in the syllabus )
Background radiations can be detected by Geiger counter and its rate constant at a given place.First record the background radiation by Geiger counter. Let count rate be n .Now, count the emission rate from the given radioactive source . Let the count rate be N
Therefore, True rate of emission = N - n

A man climbs a slope and another walks the same distance on a level road. Which of them spends more energy and why?

+ 1 more questions by anurag2001  

In Newton's first law of motion.... Is it okay if we write it as.... unless an external "unbalanced" force is applied on it. This statement is right but will they deduct marks for it being not exactly same to the def. given in the text book?
asked by Anurag Purohit (anurag2001) 7 years ago
4

All the best friends!!!

+ 2 more questions by fool  

What is the upper limit of hearing ? Is it 80dB or 120dB
asked by Murdered Past (fool) 7 years ago
2

A large truck & a car both moving with a speed ‘v’ have ahead of collision and both of them come to halt after that,If the collision lasts for 10sec. which vehicle experiences the greater force of impact? which vehicle experiences the greater momentum change? which vehicle experiences the greater acceleration? why is the likely to suffer more damage than the car?
asked by Murdered Past (fool) 7 years ago
3

Electromag waves to detect fake currency?(Bik gai hai gormint)
And how to detect background radiations

what is the relationship b/w the angle of incidence and refraction at min deviation position of the prism

Hi guyzzz. 
I would lyk to suggest you to read the board papers for physics of the following years: 2016,2014,2011.
I hv heard from someone that these papers are very important.

What is length of CERN tunnel in Geneva,Switzerland

How does resistance depend on the area of cross section of a conductor?