Courtesy of Al Matyasovsky (our speaker next Wednesday) I received a copy of Penn State’s annual recycling report for 2013, giving the tonnages of various materials recycled by PSU during that year.
You can view it here.
You might find this information useful in blog posts relating to sustainability on our campus.
On Friday’s class, we talked about how large astronomical bodies can get, but we did not look at the numbers. We also did not talk about the small objects scientists study like DNA, molecules, atoms, high-energy waves like gamma rays and subatomic particles like electrons.
To find the numbers for particular scales you can check out this list here: http://www.falstad.com/scale/
These numbers can provide a point of reference when you are trying to estimate values.
A fun interactive that helps you develop a sense of these scales can be found here: Scale of the Universe 2. To navigate the scales, use the sliding bar at the bottom. I’ve posted a screenshot of the software below, which shows how a white blood cell, a red blood cell, e-coli, a clay particle, an x-chromosome, a y-chromosome, red light and violet light compare.
“Useful Numbers” posts contain basic mathematical/scientific information that you can make use of in your own blog posts in any way you like.
Attention: The internal data of table “1” is corrupted!