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An ultrasonic level sensor for liquid gases

✍ Scribed by K.P. Selig; H.G. Wener

Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
158 KB
Volume
21
Category
Article
ISSN
0011-2275

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✦ Synopsis

have a component perpendicular to the surface. According to the laws of friction, this would allow a frictional force parallel to the surface which would increase the reaction further. For a sufficiently large angle between AC and the surface, and sufficiently large coefficient of friction, the bullet cannot be removed. Similar difficulties would occur on insertion if the bullet nose had too large an angle.

It may easily be shown that the tangential condition is approximately satisfied if the shape of the bullet is

D = P [(1 -exp (-z/O)]

(1)

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