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Washboarding effect on a road. Washboarding or corrugation [1] is the formation of periodic, transverse ripples in the surface of gravel and dirt roads.Washboarding occurs in dry, granular road material [2] with repeated traffic, traveling at speeds above 8.0 kilometres per hour (5 mph). [3]
Woman on an Israeli kibbutz using a washboard to do laundry. A washboard or a scrubbing-board [1] is a tool designed for hand washing clothing. With mechanized cleaning of clothing becoming more common by the end of the 20th century, the washboard has become better known for its secondary use as a musical instrument.
The effect of a test on learning and teaching is a concept discussed as early as the 19th century. [1] Research into washback can be traced back to the early 1980s, when the influence of tests on teaching and learning was first seen as a potential source of bias due to the accountability of test feedback loops .
A painting shows a blue person with pointed nose and elbows rubbing an angular washboard with rectangular fingers. Next to it is a 3D face cut out of a metal washboard, painted and adorned with ...
Washboard may refer to: Washboard (laundry), a tool for washing clothes; Washboard (musical instrument), a percussion instrument; Washboarding, corrugation on gravel ...
It’s midnight in southern Oregon, and my daughter’s little dog needs a last pee before bed, so I flick on the porch light and step out to find a 40-ish man in shorts and a T-shirt almost ...
It could set a new standard, and send ripple effects to embolden other workers to stick up for themselves. “That’s what’s good about this new generation; they’re very comfortable with ...
Shoving: a washboard like effect transverse to the direction of travel [5] Ride quality: uneven road surface such as swells, bumps, sags, or depressions [2] Damage: resulting from accidents and/or fires [6] It can also be used to control or change the height of part or all of the road.