Several animal species are able to hear frequencies well beyond the human hearing range. Some dolphins and bats, for example, can hear frequencies up to 100 kHz. Elephants can hear sounds at 14â16 Hz, while some whales can hear infrasonic sounds as low as 7 Hz (in water).
Several federal agencies were established during the Nixon Administration. These include: 1  OSHA (Occupational Safety and Health Administration) 2  MSHA (Mine Safety and Health Administration)  NIOSH (National Institute for Occupational Safety and Health)
The Works Progress Administration (WPA) was instituted by presidential executive order under the Emergency Relief Appropriation Act of April 1935, to generate public jobs for the unemployed. The WPA was restructured in 1939 when it was reassigned to the Federal Works Agency.he Works Progress Administration (WPA) was instituted by presidential executive order under the Emergency Relief Appropriation Act of April 1935, to generate public jobs for the unemployed. The WPA was restructured in 1939 when it was reassigned to the Federal Works Agency.