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Discovering STEM Physics Laws Set. Teach kids ages 8 and up about the laws of physics with this comprehensive science kit featuring six different projects, including a rubber band car, sharpening ...
The Dust Bowl is a 2012 American television documentary miniseries directed by Ken Burns which aired on PBS on November 18 and 19, 2012. The two-part miniseries recounts the impact of the Dust Bowl on the United States during the Great Depression of the 1930s. The series features the voices of Patricia Clarkson, Peter Coyote, and Carolyn ...
A long thin slit was cut through the goggles to allow in a small amount of light, diminishing subsequent ultraviolet rays. The goggles were held to the head by a cord made of caribou sinew. In the early 20th century, goggles were worn by drivers of uncovered cars to prevent irritation of the eyes by dust or wind. [1]
Ballistic eyewear is a form of glasses or goggles that protect from small projectiles and fragments. For the U.S. military, choices are listed on the Authorized Protective Eyewear List (APEL). [ 1 ] Ballistic eyewear including examples that meet APEL requirements are commercially available for anyone who wishes to buy it.
Some of the most famous dust storms of the Dust Bowl and similar conditions later were in fact synoptic scale events typically generated by a strong cold frontal passage, with storms on 11 November 1911, 9–11 May 1934, 14 April 1935, and 19 February 1954 having been particularly vivid examples.
The goggles fit tightly against the face so that the only light entering is through the slits, and soot is sometimes applied to the inside to help cut down on glare. [2] [5] [6] The slits are made narrow not only to reduce the amount of light entering but also to improve the visual acuity. [2] Wider slits result in a larger field of view. [2]
Panoramic night vision goggles (PNVG) increase FoV by increasing the number of sensor tubes. This solution adds size, weight, power requirements, and complexity. [69] An example is GPNVG-18 (Ground Peripheral Night Vision Goggle). [70] These goggles, and the aviation AN/AVS-10 PNVG from which they were derived, offer a 97° FoV. [68] Examples ...
A farmer and his two sons during a dust storm in Cimarron County, Oklahoma, April 1936; Resettlement Administration photograph by Arthur Rothstein. Farmer and Sons Walking in the Face of a Dust Storm is a 1936 photograph of the Dust Bowl taken by 21-year-old Arthur Rothstein, a photographer for the federal Resettlement Administration, while he was driving through Cimarron County, Oklahoma.
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