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A spherometer is an instrument used for the precise measurement of the radius of curvature of a curved surface. Originally, these instruments were primarily used by opticians to measure the curvature of the surface of a lens .
Spirograph is a geometric drawing device that produces mathematical roulette curves of the variety technically known as hypotrochoids and epitrochoids.The well-known toy version was developed by British engineer Denys Fisher and first sold in 1965.
A cutaway drawing is a technical illustration, in which part of the surface of a three-dimensional model is removed in order to show some of the model's interior in relation to its exterior. The purpose of a cutaway drawing is to "allow the viewer to have a look into an otherwise solid opaque object.
Augustus Mays, vice president for partnerships and engagement at the advocacy group The Education Trust, said block grants could disproportionately affect marginalized students.
Former President Jimmy Carter, honored more widely for his humanitarian work around the globe after his presidency than for his White House tenure during a tumultuous time, has died.He was 100 ...
The Baltimore Ravens have suspended wide receiver Diontae Johnson for one game due to “conduct detrimental to the team,” the team announced Wednesday afternoon.
Military instruments as a class draw on most of the categories of instrument described throughout this article, such as navigation, astronomy, optics, and imaging, and the kinetics of moving objects. Common abstract themes that unite military instruments are seeing into the distance, seeing in the dark, knowing an object's geographic location ...
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