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Biology; Chemistry; Physics: Post your doubts here!

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it is only affected when the speed is very very high !! ie speed of light or so ! !! otherwise it is not affected !!
Yepp....you can notice it if you travell very fast....you missed out one part - mass increases when u accelerate faster, but it's very small to notice in normal acceleration like even running p..but it still increasessss
 
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Yepp....you can notice it if you travell very fast....you missed out one part - mass increases when u accelerate faster, but it's very small to notice in normal acceleration like even running p..but it still increasessss

haha shit man !! if you know all this why ask !! :$ :$
 
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could any one help me in physics J05 paper 2
question (2) part (c)
question (5) part (a)
question (7) part (a)
question (11) part (a) (iv)
plzz do help and quickly!!!..:D

umm....
for 2 (c) you continue the ray straight and disperse it into the different colours of light....marking scheme tells that atleast two rays should be there...
5 (a) well here you have to show the magnetic field so in Compass A it would be towards West or northwest..., in Compass B it would be East and in compass C it would be West...:D
7 (a) well movement of electrons...electrons move from the negative terminal that would be the small one on the battery so on the arrow will be towards left ...:D
 
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11 (a) (i) has a small nucleas, has protons , and has electrons orbtitng it...
(ii) radioactive decay is the emission of atleast one of the Alpha, Beta, Gamma , it is random and spontaneous.
(iii) they are naturally occuring or the counts occuring without any source....:D
(iv) 205
 
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umm....
for 2 (c) you continue the ray straight and disperse it into the different colours of light....marking scheme tells that atleast two rays should be there...
5 (a) well here you have to show the magnetic field so in Compass A it would be towards West or northwest..., in Compass B it would be East and in compass C it would be West...:D
7 (a) well movement of electrons...electrons move from the negative terminal that would be the small one on the battery so on the arrow will be towards left ...:D
thnx!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!
 
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11 (a) (i) has a small nucleas, has protons , and has electrons orbtitng it...
(ii) radioactive decay is the emission of atleast one of the Alpha, Beta, Gamma , it is random and spontaneous.
(iii) they are naturally occuring or the counts occuring without any source....:D
(iv) 205
hahaha thnx!..:)
 
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And since we've started discussing the topic , i'll add another thing .
Heat capacity is dependent on mass while specific heat capacity is not. Even the book get's this wrong and says it's the other way around . The reason has been explained in the earlier posts. Specific heat capacity is only for 1kg mass . So if the mass is constant , so is it's specific heat capacity ( duh ) . But Heat Capacity can be of any mass and so is dependent on it. Again , teachers fail to use their heads while teaching and follow books blindly :( .

Credit goes to Sir Akhtar Mehmood for explaining this (to me) !

Nice ! :D

could any one help me in physics J05 paper 2
question (2) part (c)
question (5) part (a)
question (7) part (a)
question (11) part (a) (iv)
plzz do help and quickly!!!..:D

2c ) Just show two rays of the spectrum of light,one being red and the other blue with the red one being more straighter and blue one refracting more than red one !

5a) the compass needle always points in the opposite direction of the north pole of the magnet present so arrange the needles accordingly !

7a) well isnt this easy , electrons flow opposite to conventional current so it flows in the downward direction from the battery when u look at the diagram,or u cud say it flows from the negative of the battery which is marked by the small line in the battery symbol !

11a) first find the counts without background radiation it is 838-18=820
now for calculating half lives ! as it is left for tweleve hour and the source has a half life of 6 hours two half lives will occur !
So for finding out its count at 6 hours do 820/2 =410
now it halves further when another 6 hours pass so 410/2=205 counts per minute !
Show the whole working as its of two marks so probably one mark is for first half life or maybe not ! :p
 
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I feel really bad coz I can't do the alternative practical papers.....it's not in the notes....does anyone kno how to study for it? Plz help
 
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