Hydrodynamik: Kontinuitätsgleichung 4
About points...
We associate a certain number of points with each exercise.
When you click an exercise into a collection, this number will be taken as points for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit the number of points for the exercise in the collection independently, without any effect on "points by default" as represented by the number here.
That being said... How many "default points" should you associate with an exercise upon creation?
As with difficulty, there is no straight forward and generally accepted way.
But as a guideline, we tend to give as many points by default as there are mathematical steps to do in the exercise.
Again, very vague... But the number should kind of represent the "work" required.
When you click an exercise into a collection, this number will be taken as points for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit the number of points for the exercise in the collection independently, without any effect on "points by default" as represented by the number here.
That being said... How many "default points" should you associate with an exercise upon creation?
As with difficulty, there is no straight forward and generally accepted way.
But as a guideline, we tend to give as many points by default as there are mathematical steps to do in the exercise.
Again, very vague... But the number should kind of represent the "work" required.
About difficulty...
We associate a certain difficulty with each exercise.
When you click an exercise into a collection, this number will be taken as difficulty for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit its difficulty in the collection independently, without any effect on the "difficulty by default" here.
Why we use chess pieces? Well... we like chess, we like playing around with \(\LaTeX\)-fonts, we wanted symbols that need less space than six stars in a table-column... But in your layouts, you are of course free to indicate the difficulty of the exercise the way you want.
That being said... How "difficult" is an exercise? It depends on many factors, like what was being taught etc.
In physics exercises, we try to follow this pattern:
Level 1 - One formula (one you would find in a reference book) is enough to solve the exercise. Example exercise
Level 2 - Two formulas are needed, it's possible to compute an "in-between" solution, i.e. no algebraic equation needed. Example exercise
Level 3 - "Chain-computations" like on level 2, but 3+ calculations. Still, no equations, i.e. you are not forced to solve it in an algebraic manner. Example exercise
Level 4 - Exercise needs to be solved by algebraic equations, not possible to calculate numerical "in-between" results. Example exercise
Level 5 -
Level 6 -
When you click an exercise into a collection, this number will be taken as difficulty for the exercise, kind of "by default".
But once the exercise is on the collection, you can edit its difficulty in the collection independently, without any effect on the "difficulty by default" here.
Why we use chess pieces? Well... we like chess, we like playing around with \(\LaTeX\)-fonts, we wanted symbols that need less space than six stars in a table-column... But in your layouts, you are of course free to indicate the difficulty of the exercise the way you want.
That being said... How "difficult" is an exercise? It depends on many factors, like what was being taught etc.
In physics exercises, we try to follow this pattern:
Level 1 - One formula (one you would find in a reference book) is enough to solve the exercise. Example exercise
Level 2 - Two formulas are needed, it's possible to compute an "in-between" solution, i.e. no algebraic equation needed. Example exercise
Level 3 - "Chain-computations" like on level 2, but 3+ calculations. Still, no equations, i.e. you are not forced to solve it in an algebraic manner. Example exercise
Level 4 - Exercise needs to be solved by algebraic equations, not possible to calculate numerical "in-between" results. Example exercise
Level 5 -
Level 6 -
Question
Solution
Short
Video
\(\LaTeX\)
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Exercise:
Ein BM-Strahlrohr mit einem Mundstück von mm Durchmesser liefert bei einem Wasserdruck von bar einen Volumenstrom von Liter Löschwasser pro Minute. Der dazu gehöre Feuerwehrschlauch hat einen Durchmesser von mm. % Vollstrahl http://de.wikipedia.org/wiki/Mehrzweckstrahlrohr und % http://de.wikipedia.org/wiki/Feuerwehrschlauch . Mai a Mit welcher Schnelligkeit schiesst das Wasser aus der Düse? b Welchen Wasserdruck erhält man aus dem Gesetz von Torricelli? c Wie schnell strömt das Wasser im Schlauch? d Warum ist der Schlauch nicht auch mm dick?
Solution:
% . Mai Lie. * &texta v A v fracpi d^ fracDelta VDelta t q Rightarrow v fracqpi d^ frac .sim^/sispi eesim^ uulinesim/s &textb ptfracrhov^ tfracrho left fracqpi d^ right^ tfrac sikg/m^ left frac .sim^/sispi eesim^ right^ .sibar uuline.sibar &textc v fracqpi d^ frac .sim^/sispi eesim^ uuline.sim/s &textd Der Strömungswiderstand respektive der Druckverlust im Schlauch wäre zu gross. * newpage
Ein BM-Strahlrohr mit einem Mundstück von mm Durchmesser liefert bei einem Wasserdruck von bar einen Volumenstrom von Liter Löschwasser pro Minute. Der dazu gehöre Feuerwehrschlauch hat einen Durchmesser von mm. % Vollstrahl http://de.wikipedia.org/wiki/Mehrzweckstrahlrohr und % http://de.wikipedia.org/wiki/Feuerwehrschlauch . Mai a Mit welcher Schnelligkeit schiesst das Wasser aus der Düse? b Welchen Wasserdruck erhält man aus dem Gesetz von Torricelli? c Wie schnell strömt das Wasser im Schlauch? d Warum ist der Schlauch nicht auch mm dick?
Solution:
% . Mai Lie. * &texta v A v fracpi d^ fracDelta VDelta t q Rightarrow v fracqpi d^ frac .sim^/sispi eesim^ uulinesim/s &textb ptfracrhov^ tfracrho left fracqpi d^ right^ tfrac sikg/m^ left frac .sim^/sispi eesim^ right^ .sibar uuline.sibar &textc v fracqpi d^ frac .sim^/sispi eesim^ uuline.sim/s &textd Der Strömungswiderstand respektive der Druckverlust im Schlauch wäre zu gross. * newpage
Meta Information
Exercise:
Ein BM-Strahlrohr mit einem Mundstück von mm Durchmesser liefert bei einem Wasserdruck von bar einen Volumenstrom von Liter Löschwasser pro Minute. Der dazu gehöre Feuerwehrschlauch hat einen Durchmesser von mm. % Vollstrahl http://de.wikipedia.org/wiki/Mehrzweckstrahlrohr und % http://de.wikipedia.org/wiki/Feuerwehrschlauch . Mai a Mit welcher Schnelligkeit schiesst das Wasser aus der Düse? b Welchen Wasserdruck erhält man aus dem Gesetz von Torricelli? c Wie schnell strömt das Wasser im Schlauch? d Warum ist der Schlauch nicht auch mm dick?
Solution:
% . Mai Lie. * &texta v A v fracpi d^ fracDelta VDelta t q Rightarrow v fracqpi d^ frac .sim^/sispi eesim^ uulinesim/s &textb ptfracrhov^ tfracrho left fracqpi d^ right^ tfrac sikg/m^ left frac .sim^/sispi eesim^ right^ .sibar uuline.sibar &textc v fracqpi d^ frac .sim^/sispi eesim^ uuline.sim/s &textd Der Strömungswiderstand respektive der Druckverlust im Schlauch wäre zu gross. * newpage
Ein BM-Strahlrohr mit einem Mundstück von mm Durchmesser liefert bei einem Wasserdruck von bar einen Volumenstrom von Liter Löschwasser pro Minute. Der dazu gehöre Feuerwehrschlauch hat einen Durchmesser von mm. % Vollstrahl http://de.wikipedia.org/wiki/Mehrzweckstrahlrohr und % http://de.wikipedia.org/wiki/Feuerwehrschlauch . Mai a Mit welcher Schnelligkeit schiesst das Wasser aus der Düse? b Welchen Wasserdruck erhält man aus dem Gesetz von Torricelli? c Wie schnell strömt das Wasser im Schlauch? d Warum ist der Schlauch nicht auch mm dick?
Solution:
% . Mai Lie. * &texta v A v fracpi d^ fracDelta VDelta t q Rightarrow v fracqpi d^ frac .sim^/sispi eesim^ uulinesim/s &textb ptfracrhov^ tfracrho left fracqpi d^ right^ tfrac sikg/m^ left frac .sim^/sispi eesim^ right^ .sibar uuline.sibar &textc v fracqpi d^ frac .sim^/sispi eesim^ uuline.sim/s &textd Der Strömungswiderstand respektive der Druckverlust im Schlauch wäre zu gross. * newpage
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