Qualification > Sciences
Physics Help HERE ONLY !!
Enia:
Thank you so much Shogun. I'll bother you again with my stupid questions later :P
Shogun:
no prob, ask as much as u want. untill ure confident when ure at ure exam.. ;D
Ghost Of Highbury:
lol...big misunderstanding ...i was talking abt the second variant..
hah..
Ibiza279:
--- Quote from: Shogun on June 03, 2009, 10:35:10 am ---allright, see u have taken the whole mass not the mass of ice which is actually bieng melted, so its not 16.3
u need the mass taken for the ice to melt completely, ie. initial mass of ice melted is 16.3, final mass of ice melted is 2.1... so to get the actuall mass tht was melted u have to subtract
i.e 16.3-2.1=14.2g
then use the formula P x t= mlf
40 x 120 = 14.2 x m (we need to find m)
then sunsitute the equation to : (40 x 120) / 14.2
u get 338j/g which will be ure "M",
do check the mark scheme if its correct....
--- End quote ---
wo wo wo wo hold up
16.3 is the mass of ice that melted on heating and 2.1 is the mass of ice melted when there was no heat supplied meaning that the ice melted while it absorbed the heat frm the surrounding so i don't get the point of it
n By the way which year paper question is this one ?
Ghost Of Highbury:
--- Quote from: Ibiza279 on June 03, 2009, 10:41:09 am ---
--- Quote from: Shogun on June 03, 2009, 10:35:10 am ---allright, see u have taken the whole mass not the mass of ice which is actually bieng melted, so its not 16.3
u need the mass taken for the ice to melt completely, ie. initial mass of ice melted is 16.3, final mass of ice melted is 2.1... so to get the actuall mass tht was melted u have to subtract
i.e 16.3-2.1=14.2g
then use the formula P x t= mlf
40 x 120 = 14.2 x m (we need to find m)
then sunsitute the equation to : (40 x 120) / 14.2
u get 338j/g which will be ure "M",
do check the mark scheme if its correct....
--- End quote ---
wo wo wo wo hold up
16.3 is the mass of ice that melted on heating and 2.1 is the mass of ice melted when there was no heat supplied meaning that the ice melted while it absorbed the heat frm the surrounding so i don't get the point of it
n By the way which year paper question is this one ?
--- End quote ---
i am confused too...
why do u need to subtract
?
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