Qualification > Sciences

Physics

<< < (3/3)

Christy:
no

it depends on the temp. of the surrounding

thisishard:
thanks:) another question :
 M/J 2008 paper 6 question 1) b

Q80BOY:

--- Quote from: kim on May 11, 2009, 08:59:57 am ---ok i m kind of worried i need an answer to an old paper6 physics question year 1999
A drinking straw was sealed at one end with candle wax.tyhe straw was made to float upright in water by putting a small amount of ballast into the straw.The height of the top of the straw was determined  uysing a set square attached to the meter rule..The height was h

a-explain why the set square is used when taking the reading for h

b-before taking the readings for h, one of the students pushed the straw down a little.the straw then moved up and down befor coming to rest.suggest a reason why this was done.

c-the straw floats in the water so dat its top is as high as possible.For this reason the container was full of water.Suggest what would happen if the container was not quite full i.e it was three quarters full
HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ???

--- End quote ---

(a) Because the straw is far from the metre rule, the set square is used to get an accurate reading a parallax error.

(b) The straw vibrates until the force of weight balances the upthrust force.

(c) The value of h measured would be lower than it should.

gd luck  ;)

astarmathsandphysics:

--- Quote from: thisishard on May 11, 2009, 10:04:33 am ---Got a question of my own :
Phyiscs paper 6 O/N 2007 question 1 ,c)i

sorry if considered spam

--- End quote ---

Yes in the 1st min the temp fell 23 and in the last min 0.5

Navigation

[0] Message Index

[*] Previous page