Massenspektrometer für Kohlenstoffisotope
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
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Exercise:
Ein Gemisch aus einfach positiv geladenen Kohlenstoffionen isotopeC und isotopeC tritt durch eine Lochble L_ in einen Plattenkondensator mit dem Plattenabstand d.sicm und der Länge ell.sicm ein. Die gesamte Anordnung befindet sich im Vakuum. Die Flussdichte B_ beträgt .siT. enumerate item Ergänzen Sie die Skizze im Bereich zwischen L_ und L_ so dass daraus die Polung der Kondensatorplatten und die E-Feldrichtung hervorgehen. item Welche Spannung muss am Kondensator anliegen damit nur Ionen mit der Geschwindigkeit v_. ^sim/s den Kondensator unabgelenkt durchqueren? item Wie gross muss B_ rechts von L_ gewählt werden damit die Auflösung Delta y.sicm beträgt? enumerate figureH centering tikzpicturelatexscale. %draw step.colorgray! -- grid ; %fill circle .; draw-very thick -.--noderightx; node at -. Ionen; draw .rectangle-.; draw -.rectangle-.-nodebelowL_; draw .rectangle.; draw -.rectangle.-nodebelowL_; draw line width.mm ..--..; draw line width.mm .-.--.-.; draw very thick ..--..; draw very thick .-.--.-.; draw .. circle .; draw .-. circle .; foreach x in ...... foreach y in -.. node at xy otimes; draw .. rectangle .node above Schiene; draw fillwhite .. rectangle nodeleftxshift-.cmD_ .; draw fillwhite .. rectangle nodeleftxshift-.cmD_ . ; draw thick . arc ::-.; draw thick . arc ::-; draw dashed .--.-.---.; foreach x in ... foreach y in -...... node at xy otimes; draw -thick ..--noderightfracd.; draw -thick .-.--noderightfracd.; %node at .. boldsymbol+; %node at .-. boldsymbol-; draw -thick --nodeaboveell; node at .-. vecB_; node at .. vecB_; draw -thick .--noderightyshift-.cmDelta y.; tikzpicture figure
Solution:
enumerate item Plus oben Minus unten Feldlinien von oben nach unten item F_mathrmL und F_mathrmel müssen gleich gross sein: F_mathrmLF_mathrmelRa qEqv_B_ Ra EB_v_ Mit EfracUd erhält man: UB_v_dresV item Es gilt: F_mathrmZF_mathrmLRa mfracv_^rqv_B_ Ra rfracmv_qB_ Mit Delta y Delta r und qe ergibt sich: Delta yleftfracm_v_eB_-fracm_v_eB_rightfracv_eB_m_-m_ Ra B_fracv_m_-m_eDelta yres.T enumerate
Ein Gemisch aus einfach positiv geladenen Kohlenstoffionen isotopeC und isotopeC tritt durch eine Lochble L_ in einen Plattenkondensator mit dem Plattenabstand d.sicm und der Länge ell.sicm ein. Die gesamte Anordnung befindet sich im Vakuum. Die Flussdichte B_ beträgt .siT. enumerate item Ergänzen Sie die Skizze im Bereich zwischen L_ und L_ so dass daraus die Polung der Kondensatorplatten und die E-Feldrichtung hervorgehen. item Welche Spannung muss am Kondensator anliegen damit nur Ionen mit der Geschwindigkeit v_. ^sim/s den Kondensator unabgelenkt durchqueren? item Wie gross muss B_ rechts von L_ gewählt werden damit die Auflösung Delta y.sicm beträgt? enumerate figureH centering tikzpicturelatexscale. %draw step.colorgray! -- grid ; %fill circle .; draw-very thick -.--noderightx; node at -. Ionen; draw .rectangle-.; draw -.rectangle-.-nodebelowL_; draw .rectangle.; draw -.rectangle.-nodebelowL_; draw line width.mm ..--..; draw line width.mm .-.--.-.; draw very thick ..--..; draw very thick .-.--.-.; draw .. circle .; draw .-. circle .; foreach x in ...... foreach y in -.. node at xy otimes; draw .. rectangle .node above Schiene; draw fillwhite .. rectangle nodeleftxshift-.cmD_ .; draw fillwhite .. rectangle nodeleftxshift-.cmD_ . ; draw thick . arc ::-.; draw thick . arc ::-; draw dashed .--.-.---.; foreach x in ... foreach y in -...... node at xy otimes; draw -thick ..--noderightfracd.; draw -thick .-.--noderightfracd.; %node at .. boldsymbol+; %node at .-. boldsymbol-; draw -thick --nodeaboveell; node at .-. vecB_; node at .. vecB_; draw -thick .--noderightyshift-.cmDelta y.; tikzpicture figure
Solution:
enumerate item Plus oben Minus unten Feldlinien von oben nach unten item F_mathrmL und F_mathrmel müssen gleich gross sein: F_mathrmLF_mathrmelRa qEqv_B_ Ra EB_v_ Mit EfracUd erhält man: UB_v_dresV item Es gilt: F_mathrmZF_mathrmLRa mfracv_^rqv_B_ Ra rfracmv_qB_ Mit Delta y Delta r und qe ergibt sich: Delta yleftfracm_v_eB_-fracm_v_eB_rightfracv_eB_m_-m_ Ra B_fracv_m_-m_eDelta yres.T enumerate
Meta Information
Exercise:
Ein Gemisch aus einfach positiv geladenen Kohlenstoffionen isotopeC und isotopeC tritt durch eine Lochble L_ in einen Plattenkondensator mit dem Plattenabstand d.sicm und der Länge ell.sicm ein. Die gesamte Anordnung befindet sich im Vakuum. Die Flussdichte B_ beträgt .siT. enumerate item Ergänzen Sie die Skizze im Bereich zwischen L_ und L_ so dass daraus die Polung der Kondensatorplatten und die E-Feldrichtung hervorgehen. item Welche Spannung muss am Kondensator anliegen damit nur Ionen mit der Geschwindigkeit v_. ^sim/s den Kondensator unabgelenkt durchqueren? item Wie gross muss B_ rechts von L_ gewählt werden damit die Auflösung Delta y.sicm beträgt? enumerate figureH centering tikzpicturelatexscale. %draw step.colorgray! -- grid ; %fill circle .; draw-very thick -.--noderightx; node at -. Ionen; draw .rectangle-.; draw -.rectangle-.-nodebelowL_; draw .rectangle.; draw -.rectangle.-nodebelowL_; draw line width.mm ..--..; draw line width.mm .-.--.-.; draw very thick ..--..; draw very thick .-.--.-.; draw .. circle .; draw .-. circle .; foreach x in ...... foreach y in -.. node at xy otimes; draw .. rectangle .node above Schiene; draw fillwhite .. rectangle nodeleftxshift-.cmD_ .; draw fillwhite .. rectangle nodeleftxshift-.cmD_ . ; draw thick . arc ::-.; draw thick . arc ::-; draw dashed .--.-.---.; foreach x in ... foreach y in -...... node at xy otimes; draw -thick ..--noderightfracd.; draw -thick .-.--noderightfracd.; %node at .. boldsymbol+; %node at .-. boldsymbol-; draw -thick --nodeaboveell; node at .-. vecB_; node at .. vecB_; draw -thick .--noderightyshift-.cmDelta y.; tikzpicture figure
Solution:
enumerate item Plus oben Minus unten Feldlinien von oben nach unten item F_mathrmL und F_mathrmel müssen gleich gross sein: F_mathrmLF_mathrmelRa qEqv_B_ Ra EB_v_ Mit EfracUd erhält man: UB_v_dresV item Es gilt: F_mathrmZF_mathrmLRa mfracv_^rqv_B_ Ra rfracmv_qB_ Mit Delta y Delta r und qe ergibt sich: Delta yleftfracm_v_eB_-fracm_v_eB_rightfracv_eB_m_-m_ Ra B_fracv_m_-m_eDelta yres.T enumerate
Ein Gemisch aus einfach positiv geladenen Kohlenstoffionen isotopeC und isotopeC tritt durch eine Lochble L_ in einen Plattenkondensator mit dem Plattenabstand d.sicm und der Länge ell.sicm ein. Die gesamte Anordnung befindet sich im Vakuum. Die Flussdichte B_ beträgt .siT. enumerate item Ergänzen Sie die Skizze im Bereich zwischen L_ und L_ so dass daraus die Polung der Kondensatorplatten und die E-Feldrichtung hervorgehen. item Welche Spannung muss am Kondensator anliegen damit nur Ionen mit der Geschwindigkeit v_. ^sim/s den Kondensator unabgelenkt durchqueren? item Wie gross muss B_ rechts von L_ gewählt werden damit die Auflösung Delta y.sicm beträgt? enumerate figureH centering tikzpicturelatexscale. %draw step.colorgray! -- grid ; %fill circle .; draw-very thick -.--noderightx; node at -. Ionen; draw .rectangle-.; draw -.rectangle-.-nodebelowL_; draw .rectangle.; draw -.rectangle.-nodebelowL_; draw line width.mm ..--..; draw line width.mm .-.--.-.; draw very thick ..--..; draw very thick .-.--.-.; draw .. circle .; draw .-. circle .; foreach x in ...... foreach y in -.. node at xy otimes; draw .. rectangle .node above Schiene; draw fillwhite .. rectangle nodeleftxshift-.cmD_ .; draw fillwhite .. rectangle nodeleftxshift-.cmD_ . ; draw thick . arc ::-.; draw thick . arc ::-; draw dashed .--.-.---.; foreach x in ... foreach y in -...... node at xy otimes; draw -thick ..--noderightfracd.; draw -thick .-.--noderightfracd.; %node at .. boldsymbol+; %node at .-. boldsymbol-; draw -thick --nodeaboveell; node at .-. vecB_; node at .. vecB_; draw -thick .--noderightyshift-.cmDelta y.; tikzpicture figure
Solution:
enumerate item Plus oben Minus unten Feldlinien von oben nach unten item F_mathrmL und F_mathrmel müssen gleich gross sein: F_mathrmLF_mathrmelRa qEqv_B_ Ra EB_v_ Mit EfracUd erhält man: UB_v_dresV item Es gilt: F_mathrmZF_mathrmLRa mfracv_^rqv_B_ Ra rfracmv_qB_ Mit Delta y Delta r und qe ergibt sich: Delta yleftfracm_v_eB_-fracm_v_eB_rightfracv_eB_m_-m_ Ra B_fracv_m_-m_eDelta yres.T enumerate
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