IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Sciences => Topic started by: HalpPlease on November 04, 2009, 05:39:23 am

Title: Physx paper 6.
Post by: HalpPlease on November 04, 2009, 05:39:23 am: does anyone know latent heat fusion formula's and specific latent heat etc. and also what are all the ways of improving experiments.

Thanks :D
Title: Re: Physx paper 6.
Post by: Ghost Of Highbury on November 04, 2009, 06:47:26 am: specific heat capacity = $\frac{energy absorbed}{mass * temp. change}$

specifc latent heat = $\frac{energy absorbed}{mass}$

the expirmental changes can be

-repeat for average and accuracy
-insulate
-switch of power source when recording readings to prevent heating of the wire and change in resistance
-use data logging for accurate time intervals
-transfer hot objects into beakers of water more quickly to prevent heat loss
-check for zero error- (vernier calliper & screq gauge)
-read measurements perpendicularly to scale-avoid parallax
-use a lid (to avoid heat loss)

if i get more i'll add them here
Title: Re: Physx paper 6.
Post by: dlehddud on November 04, 2009, 07:24:10 am: yea the formulas right
and the accuracy problems differ with each question
it depends wot topic the questions on
Title: Re: Physx paper 6.
Post by: Ghost Of Highbury on November 04, 2009, 07:31:36 am: Quote from: dlehddud on November 04, 2009, 07:24:10 am
yea the formulas right
and the accuracy problems differ with each question
it depends wot topic the questions on

yea..those were the general ones/.

if u know more..cud u plz add on..
Title: Re: Physx paper 6.
Post by: dlehddud on November 04, 2009, 08:08:45 am: transfer hot objects in to beakers of water more quickly to prevent heat loss
check for zero error- measurements start at zero
read measurements perpendicularly to scale-avoid parallax
use a lid - seperate mark from insulate

nd looking 4 more :D :D
Title: Re: Physx paper 6.
Post by: Ghost Of Highbury on November 04, 2009, 08:12:38 am: Quote from: dlehddud on November 04, 2009, 08:08:45 am
transfer hot objects in to beakers of water more quickly to prevent heat loss
check for zero error- measurements start at zero
read measurements perpendicularly to scale-avoid parallax
use a lid - seperate mark from insulate

nd looking 4 more :D :D

thanks ..i'll add these to the list