Studies increasingly suggest that schools can safely reopen if the right precautions are followed. The NYT published an animation showing how virus particles can move around a classroom if one student ...
Here is an introduction to the low cost anemometer (wind sensor) from Modern Device (http://moderndevice.com) . This small sensor suitable for electronic experiments ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback