62 lines
1.6 KiB
Dart
62 lines
1.6 KiB
Dart
import 'package:flutter/cupertino.dart';
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class variables extends ChangeNotifier {
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double _startH = 0; //in Meter
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double _endH = 0; // in Meter
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double _startG = 0; // in m / s
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double _endG = 0; // in m / s
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double _masse = 0; // in KG
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final double _g = 9.81; // m / s^2
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double _startTempWasser = 20; // Grad Celcius
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double _endTempWasser = 100; // Grad Celcius --> hier kocht Wasser
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double get wasserTempDif => _endTempWasser - _startTempWasser;
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double _startTempEisen = 20; // Grad Celcius
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double _endTempEisen = 700; // Grad Celcius --> hier glüht Eisen
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double get eisenTempDif => _endTempEisen - _startTempEisen;
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final double _cEisen =
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449; // J pro KG * K --> 1KG Eisen braucht 449 Joule um 1 Grad erhitzt zu werden
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final double _cWasser =
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4181; // J pro KG * K --> 1KG / 1L Wasser braucht 4181 Joule um 1 Grad erhöht zu werden
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// Getter
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double get hDif => _endH - _startH;
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double get gDif => _endG - _startG;
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double get eLage => _masse * _g * hDif; // kg*m / s^2*m = Joule
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double get eBewegung => (_masse * (gDif * gDif)) / 2; // kg*(m/s)^2 = Joule
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double get literWasser => ((eLage + eBewegung) / _cWasser) / wasserTempDif;
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double get kgEisen => ((eLage + eBewegung) / _cEisen) / eisenTempDif;
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// Setter
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void setStartH(double h) {
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_startH = h;
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notifyListeners();
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}
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void setEndH(double h) {
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_endH = h;
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notifyListeners();
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}
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void setStartGes(double ges) {
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_startG = ges;
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notifyListeners();
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}
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void setEndGes(double ges) {
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_endG = ges;
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notifyListeners();
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}
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void setMasse(double m) {
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_masse = m;
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notifyListeners();
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}
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}
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