Help!!

samapp

clothes made from certain fabrics e.g. denim are not suitable for hill walking or mountain climbing. carry out an investigation to compare the thermal insulating properties of 3 different fabrics (wool,cotton and denim) when they are dry and when they are wet. denim must be one of them but try to use the 3 i suggested. Junior cert science projects physics 2008

Megatron_X

This is Science Coursework B I'm guessing? My class is doing the same one,but help isn't aloud :P

I don't even know what your asking either. But my class wrapped a certain amount of each fabric around a vial of hot water and noted the heat drop in 10 minute period and then again with the wet fabrics.

highlydebased

.....................or just go hillwalking in the freezing cold in the rain lol...

.....................................sorry lol

Spurs Fan

Megatron_X wrote: »

This is Science Coursework B I'm guessing? My class is doing the same one,but help isn't aloud :P


I thought we were allowed help.My science teacher was a bit fuzzy but I thought we could look on any internet site for research...
Havnt a clue what else im supposed to do.

irishcouser07

What research ya need to do ??

Its pretty simple what ya have to do for the actual experiment,well mine was anyways :cool:

Delphi91

samapp wrote: »

clothes made from certain fabrics e.g. denim are not suitable for hill walking or mountain climbing. carry out an investigation to compare the thermal insulating properties of 3 different fabrics (wool,cotton and denim) when they are dry and when they are wet. denim must be one of them but try to use the 3 i suggested. Junior cert science projects physics 2008

Think about what you need to do here.......

You have three pieces of fabric which you want to check the insulating properties of. So, the only difference between them should be what they are made of. Everything else stays the same - size, thickness, etc. This is the concept of a "variable" that the booklet refers to - the variable is the only thing that is different - in this case, the type of fabric. Everything else must be the same.

You want to see how good an insulator they are, so I would suggest that you try to see how good they are at keeping heat in.

If I was doing the experiment (and I'm not!), I'd get three containers (beakers, jam jars, plastic cups, whatever, as long as the three are the same), wrap the three pieces of fabric around each container and fill each with exactly the same amount of water at the same temperature (again, keep everything the same between the three containers). Then place a thermometer in each and take the temp of the water, say every minute until you have 10-15 readings for each container. You can check the readings yourself and if the temp doesn't change much every minute, then do it every 5 mins or so - whatever it takes to get a noticeable change in temp.

Then repeat the experiment, but this time the fabric samples have to be wet. Make sure each sample is thoroughly soaked in water by say, submerging them in a bowl of water. Repeat the instructions as mentioned above.

There will be a certain amount of error with this last step as you cannot guarantee that each fabric will retain the same amount of water (comment on this in the booklet).