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Showing posts from December, 2019

Safety with household chemicals Friday December 13 2019

Our initial discussion! https://www.michigan.gov/documents/lara/lara_miosha_ghs_training_408844_7.ppt SDS sheet search:  https://www.3m.com/3M/en_WW/sds-search-select-location/  (or use Google) Top 10 Hazardous Household Chemicals AIR FRESHENERS:  Most air fresheners interfere with your ability to smell by coating your nasal passages with an oil film, or by releasing a nerve deadening agent. Known toxic chemicals found in an air freshener:  Formaldehyde:  Highly toxic, known carcinogen.  Phenol:  When phenol touches your skin it can cause it to swell, burn, peel, and break out in hives. Can cause cold sweats, convulsions, circulatory collapse, coma and even death. AMMONIA:  It is a very volatile chemical, it is very damaging to your eyes, respiratory tract and skin. BLEACH:  It is a strong corrosive. It will irritate or burn the skin, eyes and respiratory tract. It may cause pulmonary edema or vomiting and coma if ingested....

Science Discussion Group Guidelines

Science Discussion Group Guidelines Good discussions result from an organized approach that both includes and excludes certain elements and controls that help guide their freedom. Include: ·        A committed discussion leader for every session ·        Preparation by all for the discussion, especially by the topic leader ·        Goal of the discussion explained ·        Use topics of general interest ·        Meet the needs of the group ·        Avoid domination by anyone including leader; rein-in dominators; defuse axe-grinders ·        Make sure everyone has a chance to participate; no one is ignored ·        Encourage but also control discussion flow ·        You get out what you put in ...

Gravity and Relativity: Why do masses attract one another? Fri, January 10, 1PM

These are useful references for those of us who are not astrophysicists and don't want to get lost in mathematical formulas. I'll continue to search for useful references, these are a good start. https://www.space.com/ classical-gravity.html https://www.space.com/17661- theory-general-relativity.html https://medium.com/starts- with-a-bang/ask-ethan-if-mass- curves-spacetime-how-does-it- un-curve-again-ce51a391cdc4 My question is how does this result in unsupported things falling toward the earth, i.e. gravity? Dan Klein