Phiscis Paper1 O/N 2004 and 2005

[1992]

I need help please on O/N 2004 Q 20, 21 and 32
Also O/N 2005: Q 5,7, 21 and 33 please

 

[ashhadazam]

Nov 2004 . Q.20 ) P=pgh ! p =P/gh !
Density of P / Density of Q = (P/2x)/(P/x) = 1/2 . Option A

Q.21) there are two forms amophous and crystalline. metallic structures are crystalline while nonmetals and polymers are amorphous.. Diamond has a crystalline structure and copper is a metal so it has a crysatalline structure too. so option A

Q.32 ) Find the greatest power dissipation through I^2 x R . Option B gives the greatest power equal to 144W

 

[ashhadazam]

Nov 2005 :

Q.5) Calculate the fractional uncertainties of all quantities.. add them up and multiply them by the density which i 2.5 ! U will get ur answer !

Q.7) the equation here is : i am taking t1 as x and t2 as y


!.21

x+h = 0.5gy^2
U need to remove x. x =o.5gx^2

now the equations are : h= 0.5gy^2 - 0.5gx^2 ! make g the subject and u have ur answer as D

 

[1992]

Thanks , and how do u do Q 21 and Q33?

 

[henglin]

hey hows it going?
im willing to help in physics past papers