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Automotive dictionary (encyklopedia)

Dictionary of terms and abbreviations for cars (automobiles), motorcycles (bikes),
bicycles, boats, engines, machines, machining and car fixing.

# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Bohr radius

According to the Bohr model of the hydrogen atom, the electron when in its lowest energy state move around the nucleus in a circular orbit of radius
 4πε0h² a0 = ——————— = 5.292 x 10-11 m me
where h is Dirac's constant, m e is the mass of the electron, e is the electronic charge and e 0 the permittivity of free space. The Bohr radius is a fundamental distance in atomic phenomena.
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Car Insurance FAQs #3

Why is the insurance company not returning all of my premium after the policy was canceled?

Depending on the type of policy, you may be required to pay a minimum premium, or the premium may be fully "earned." In other instances, if you replaced your coverage with a different company, during the policy term, you may be subject to a "short-rate" penalty, which is usually about 10% of the unearned amount. You might also have some premium due for recent changes in coverage. The company should be able to provide a detailed billing history that explains the return-premium calculation.

Am I required to complete a medical questionnaire?

(...)

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