FSIS is the public health agency in the US Department of agriculture responsible for ensuring that the nations commercial supply of meat poultry and processed egg products is safe wholesome and correctly labeled and packaged. TheFDA is charged with protecting the public health by sharing that foods are safe wholesome sanitary and properly labeled that cosmetics and dietary supplements are safe in properly labeled that human in veterinarian drugs and vaccines and other biological products and medical devices intended for human or use or safe and effective regulating tobacco products and protecting the government from electronic radiation. CDC leads federal efforts to gather data on foodborne illnesses investigative foodborne illnesses and outbreaks and monitor the effectiveness of prevention and control of efforts in reducing foodborne illness CDC also plays a role in building state and local health department epidemiolgy laboratory in environmental health capacity to support foodborne agency surveillance and outbreak responsibility
I think that one of the misconceptions that Columbus had about the world is that it was flat when as we know now it's very much not. I hope this helps :)
The one vibrating faster if you think about when singing in order to hit high notes you must push air faster while when singing lower you slow down the speed o air being pushed its the same with high pitch Nd low pitch frequency higher equals faster and lower equals slower