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A2 Physics | Post your doubts here

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guys..plz help with the graph question i posted above. also, weird confusion. :p is it larmor frequency or lamour frequency. application booklet says lamour but all other books i have say larmor and also the marking scheme says larmor!! :p
 
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Using the first law of thermodynamics, explain why the specific latent heat of vaporization is greater than the specific latent heat of fusion for a particular substance?

cn smone explain
 
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you need more energy to make work against atmosphere when the gas is expanding, plus you need more thermal energy to break intermolecular forces.
 
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http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s11_qp_41.pdf please do Q 4 (ii) i dont get the question
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Physics (9702)/9702_s09_qp_4.pdf and Q9 part b please give a clear solution for this as i dont get it

thanku please reply fast tomorrow i have a paper

For Q9 b) the difference in the uncertainties is 10%-2% =8%

That's an uncertainty of 0.08. So to calculate the activity for when the source is not decaying 0.08, it would be decaying 1-0.08= 0.92.
so the activity= 0.092 decay constant=0.693/half life .. and the rest is just
A
= A0 exp(–ln2 t / T½
)
 
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co
For Q9 b) the difference in the uncertainties is 10%-2% =8%

That's an uncertainty of 0.08. So to calculate the activity for when the source is not decaying 0.08, it would be decaying 1-0.08= 0.92.
so the activity= 0.092 decay constant=0.693/half life .. and the rest is just
A
= A0 exp(–ln2 t / T½
)

could you plz elobarte this mate!!!
espically didnt get the part when u said 1-0.08!!!
 
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