In-facepiece dust concentration is changed dozens of times in a matter of minutes due to changes of the size of the gaps between the mask and face. Source. A respirator is a device designed to protect the wearer from inhaling particulate matter, including airborne microrganisms, fumes, vapors, i.e. gases.
Why join Brainly? A community for students. Products of the neolithic culture Steel plows Boats with sails Domesticated dogs Wild figs. the answer would mostly likely be referring to things that actually were of use to the neolithic people and agriculture was the biggest thing making the answer steel plow. anonymous.
The Neolithic (or New Stone Age) was a period in the development of human technology that is traditionally the last part of the Stone Age.The name was invented by John Lubbock, 1st Baron Avebury (1834-1913) in 1865 as a refinement of the three-age system of stone, bronze, and iron ages.he Neolithic (or New Stone Age) was a period in the development of human technology that is traditionally the last part of the Stone Age.