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Liquid Nitrogen and Dry Ice


fairfarmhand
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My dh recently bought a set of freeze brands for our cattle. You use dry ice to brand the animals; it kills the pigment cells in the hair and the hair grows in white.

 

He also recently purchased a semen tank for artificial insemination of our cows. It stays cold by way of Liquid Nitrogen.

 

So now my homeschool mom science brain is whirring.  What can I do with those two chemicals?

 

hehehe!!!!

 

(yes, it is a bit disturbing to have a tank of bull semen in your bedroom at night.)

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You can eat liquid nitrogen cooled marshmallows almost immediately after freezing (twirl then a bit first to make sure there are no drops on the surface).

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Ds1 built a wind tunnel--basically a box with plexiglass for one of the long sides and a fan on one of the short sides--to demonstrate airflow. I think he found instructions on the web somewhere. I don't remember much about it as dh worked with him on that project and it was about 5 years ago.

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