Biology; Chemistry; Physics: Post your doubts here!

[Maganius]

Which 3?

Methods for Detection of Radioactivity:
1) The gold-leaf; or
2) The diffusion cloud chamber; or
3) The G-M tube

 

[asadalam]

Methods for Detection of Radioactivity:
1) The gold-leaf; or
2) The diffusion cloud chamber; or
3) The G-M tube

I guess so,though i know the latter 2 better so thats why i was saying

 

[Maganius]

I guess so,though i know the latter 2 better so thats why i was saying

oh okay

 

[kirann]

ye kia hai

 

[asadalam]

View attachment 42790
ye kia hai

Answer is B?

 

[kirann]

Answer is B?

yes

 

[funky brat]

There's this question that describe a method to determine whether a piece of metal emits gamma rays. Do we use the Wilson could chamber thingy or the gm tube by measuring the count rate by placing a paper then aluminum and then lead infront of the detector?

I think you should use the diffusion cloud chamber. You can measure the count rate with GM tube but you can't say what type of radiations they are.

 

[asadalam]

I think you should use the diffusion cloud chamber. You can measure the count rate with GM tube but you can't say what type of radiations they are.

We can place the barriers one by one and if it passes the aluminium and a count rate higher than background is registered we can say it is gamma

 

[funky brat]

We can place the barriers one by one and if it passes the aluminium and a count rate higher than background is registered we can say it is gamma

Lagy raho phir.

 

[Faizan Muhammmad]

Count rate one is always pakka
the clouds may be difficult to define, say if multiple types are there they will mix up with each other in clouds

 

[Awesome12]

Hey in the application of radioactivity in the medical field, where do we use gamma, beta and alpha?

 

[funky brat]

Count rate one is always pakka
the clouds may be difficult to define, say if multiple types are there they will mix up with each other in clouds

Yeh unka masla hai, ham ne experiment kar kay nahi dikhana sirf batana hai.

 

[Lilly2318]

Q17 PLZ HELP

 

[Suhaib]

for that Q4, u'll apply head-to-tail rule, or paralellogram method. so simply, as both forces on object are equal, the resultant will be their angle bisector.

Q5, it says *turning* in a *horizontal* circle. so the only force in a horizontal direction is D.

For Q#4 Ans is B ??

 

[Qasim Hafeez]

Sorry to pop in.
But guys, but want to confirm something. i heard nov sessions is easier than june.? but there is a disadvantage of it too, percentile doesn't work in nov session?

 

[kirann]

View attachment 42790
ye kia hai

koi smjhadeyyy

 

[Lilly2318]

Q17 PLZ HELP

HELPPPPPPPPPPPPPPPPP

 

[asadalam]

Hey in the application of radioactivity in the medical field, where do we use gamma, beta and alpha?

We use gamma only,cuz its the only one that can penetrate through the skin easily.

Q17 PLZ HELP

Using the formula H=mc(delta)
5.2X1000=5200=2x20x (X)
Divide 5200 by 40 we get 130 so C is the answer

koi smjhadeyyy

In calibration we use 2 fixed points that are 0 C and 100C

 

[Lilly2318]

koi smjhadeyyy

lower point is alwway 0 and higher boilig point is always 100

 

[kirann]

Q17 PLZ HELP

is the answer D ?