physics 22

[urvi kapoor]

But can it be air resistance?

 

[DumbIdiot]

what were the 3 points for the alpha beta particle question
1 was because of mass
2 cause of charge
what was the 3rd 1?

i think u can break the charge into two:
1.+ve vs -ve charge
2.mag of charge on alpha = 2x charge on beta
3. different mass

 

[Muhammad Haris Ghani]

did anyone get power=41w and pq =.18m

yes 41w and 0.089m

 

[Muhammad Haris Ghani]

the gt would be 42-45

 

[rabos1]

the gt would be 42-45

45??? Impossible.. it would be in 30's...

 

[rabos1]

the gt would be 42-45

Wave was progressive and transverse? Want to confirm again..

 

[Muhammad Haris Ghani]

Wave was progressive and transverse? Want to confirm again..

exactly and the speed for the wave?

 

[rabos1]

exactly and the speed for the wave?

Time period was given so I calculated frequency.. then I used this formula v=fx wavelength

 

[Muhammad Haris Ghani]

Time period was given so I calculated frequency.. then I used this formula v=fx wavelength

I did the same it was 1 osc in 0.2 sec so in one sec it would be 5 as frequency was 5hz and wavelength 1.5m the speed i got was 7.5ms and u

 

[naoomi]

I wrote progressive and transverse too since the wave was travelling on the rope. And according to me the question was meant to point that travelling wave and not the one which would be formed by the superposition of incident and the reflected wave.

 

[naoomi]

how were we supposed to find the distance PQ? and what about the graph that was to be made in the other part? was it a curve or a straight line??

 

[Muhammad Haris Ghani]

how were we supposed to find the distance PQ? and what about the graph that was to be made in the other part? was it a curve or a straight line??

find the deceleration by 14/0.4=-35 and then distance by 2as=v2-u2 where u was 2.4ms the line was a straight line

 

[Muhammad Haris Ghani]

I wrote progressive and transverse too since the wave was travelling on the rope. And according to me the question was meant to point that travelling wave and not the one which would be formed by the superposition of incident and the reflected wave.

I did the same what was your speed for the wave

 

[Muhammad Haris Ghani]

Exactly, the threshold should be like 56/57 on 60 for an A

yessssssssssssssssssssss it should be what was your speed for the wave I got 7.5ms

 

[naoomi]

find the deceleration by 14/0.4=-35 and then distance by 2as=v2-u2 where u was 2.4ms the line was a straight line

ok. I used this equation but did mistake in calculating deceleration i think.

 

[naoomi]

I did the same what was your speed for the wave

speed was calculated using frequency into wavelength = 1/0.2 * 1.5 =7.5 m/s

 

[Tirtho Sarker]

WELL, I don't know.. I thought stationary wave is only produced when two identical wave overlap while passing through same medium at the sane time in exactly opposite direction..and in stationary wave, all particles oscillate with same amplitude, right? Anyway, it was transverse right?

its progressive as direction of travel was horizontal..and transverse yes.

 

[Tirtho Sarker]

the gt would be 42-45

no way bro..maximum students left no. 2 untouched..so there goes 7 marks..how do you expect it to be more than 35?

 

[rabos1]

I did the same it was 1 osc in 0.2 sec so in one sec it would be 5 as frequency was 5hz and wavelength 1.5m the speed i got was 7.5ms and u

Same

 

[rabos1]

find the deceleration by 14/0.4=-35 and then distance by 2as=v2-u2 where u was 2.4ms the line was a straight line

Are you sure we were supposed to calculate using equation of motion?? I used equation of motion too to calculate ow distance... But most of the ppl calculated it by using formula work done= force x distance.. work done was there, taking force value from the graph.. and they are getting 0.081.. I think we did it wrong.. we were not supposed to calculate pa using equation of motion..