Cartes-fiches

Cartes-fiches 370 Cartes-fiches
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Langue English
Niveau Autres
Crée / Actualisé 28.04.2022 / 11.05.2022
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An object moves with the speed V on a circular track. A double increase of the object's speed will cause the following: 

Angular speed "Omega" doubles - centripetal accelaration "ar" increases four times.

Angular speed "Omega" doubles - centripetal accelaration "ar" doubles.

Angular speed "Omega" increases four times - centripetal accelaration "ar" increases four times.

Angular speed "Omega" increases four times - centripetal accelaration "ar" doubles.

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An object moves with the speed V on a circular track. A double increase of the track's radius will cause the following: 

Angular speed "Omega" decreases by half - the object's full period path doubles - centripetal accelaration "ar" decreases by half.

Angular speed "Omega" decreases by half - the object's full period path decreases by half - centripetal accelaration "ar" decreases by half.

Angular speed "Omega" decreases by half - the object's full period path doubles - centripetal accelaration "ar" doubles.

Angular speed "Omega" decreases by half - the object's full period path double - centripetal accelaration "ar" stays constant.

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An object moves with the speed "V" on a circular track with radius "R". The resultant acceleration vector is always directed:

Towards the track center.

Towards the outside of the track.

Towards the outside of the track.

Tangent to the circle.

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Static pressure at the separation point (change from laminar flow to turbulent flow) is:

Minimal on the upper surface and maximal on the bottom surface.

Maximal on the upper surface and mnimal at the bottom surface.

Minimal on the upper surface ana minimal on the bottom surface.

Maximal on the upper surface and maximal on the bottom surface.

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What does "the universal gas law" mean?

Relation between static pressure, density, temperature and gas constant p=rho*g*R*T [Pa].

Relation between the air pressure and its temperature

Equation of a balance between the air pressure and its humidity.

Equation of the balance between the air pressure and earth acceleration

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What dose the term " controllability " of a flying object ( plane, helicopter, glider, hang-glider etc) mean?

Ability of the object to "respond" to control impulses induced by the pilot.

Assurance that acrobatic exercises are permitted.

Assurance that the object's performance is as designed.

Assurance that the object is statically and dynamically stable.

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What does "stagnation pressure" mean?

The difference between the dynamic and static pressure.

The highest measured pressure.

The lowest measured pressure.

The sum of a dynamic and static pressure.

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What is a "laminar flow"?

Undisturbed flow from the leading edge to the separation point.

Undisturbed flow along the entire chord, with air streams adhering to the profile.

Disturbed (turbulent) flow along the entire profile chord.

Disturbed (turbulent) flow along the entire profile chord, with maintained stream adherence to the profile.