Science Buddies: "Ask an Expert"

I have 2 questions about this project(I am planning on doing this for the science fair):
1. Is there any benefit or advantage to using 220 grit sandpaper over normal sandpaper?
2. Where can I find thermocouples on Amazon for different metals like iron or plain steel wire, copper, or aluminum? I would like to make this project a little more unique and I am curious what the results would be if I did a different metal.

I don't understand the question about 220 grit sandpaper. What are you wanting to do with the sandpaper?

In terms of the sandpaper, the 220 is a fine grit. As mentioned in the procedure, you may find the wire stripping tutorial (and the videos in it) helpful as a reference. https://www.sciencebuddies.org/science- ... g-tutorial

Amy
Science Buddies


Project url: https://www.sciencebuddies.org/science- ... #procedure

Hi manraj21,
In regards to your 2nd question "Where can I find thermocouples on Amazon for different metals like iron or plain steel wire, copper, or aluminum?"

I am afraid the short answer is that there's not a easy way to search for this on Amazon that I am aware of. This requires a two step process:

1. Please look up the "Type" of Thermocouple that you would like to test at: https://en.wikipedia.org/wiki/Thermocouple The experiment had called for "type K" thermocouple and, from this chart, you can see that it is made up of chromel–alumel. Now, using "copper" as the search term on this article, you should find that this is a "Type T" thermocouple.

2. Using this information, you can now try to find this on Amazon by using the search term "Type __ Thermocouple". Here's the results on the "Type T" thermocouple mentioned above.

https://www.amazon.com/Perfect-Prime-Th ... ermocouple

Good Luck and Please post again if we can be of any further help!
Willey