What is the acceptable level of H2S?


What is the acceptable level of H2S? The Occupational Safety and Health Administration (OSHA) defines Permissible Exposure Limits (PELs) to H2S gas as follows: General Industry Ceiling Limit: 20 ppm.…

How do Japanese heat packs work?


How do Japanese heat packs work? The kairo package contains iron filings, water, vermiculite, carbon and salt. When exposed to air the iron oxidises and heats up over a period…

Who is the current chairman of BRICS?


Who is the current chairman of BRICS? Member states and key leaders:BrazilPresident Jair BolsonaroRussiaPresident Vladimir PutinIndiaPrime Minister Narendra ModiChina (2022 host)President Xi JinpingSouth AfricaPresident Cyril Ramaphosa Which country is the…