61 lines
1.8 KiB
Dart
61 lines
1.8 KiB
Dart
import 'package:flutter/material.dart';
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class EnergyModelProvider with ChangeNotifier {
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double potentialEnergy = 0,
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kineticEnergy = 0,
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energyInJoule = 0,
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literWaterToHeat = 0,
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kilogrammIronToHeat = 0;
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EnergyModelProvider() {}
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/// E = kg * (m^2 / s^2)
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double calculateEnergyInJoule(String weightValue, String velocity) {
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double weightValueInDouble = double.parse(weightValue);
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double velocityInDouble = double.parse(velocity);
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energyInJoule = (velocityInDouble * velocityInDouble) / weightValueInDouble;
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notifyListeners();
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return energyInJoule;
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}
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/// E = m * g * h in Joule
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void calculateEnergyPotential(String weightValue, String altitudeChange) {
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double weightValueInDouble = double.parse(weightValue);
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double altitudeChangeInDouble = double.parse(altitudeChange);
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potentialEnergy = weightValueInDouble * 9.81 * altitudeChangeInDouble;
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notifyListeners();
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}
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/// E = 1/2 * m * v^2 in Joule
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void calculateEnergyKinetic(String weightValue, String velocity) {
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double weightValueInDouble = double.parse(weightValue);
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double velocityInDouble = double.parse(velocity);
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kineticEnergy =
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0.5 * weightValueInDouble * (velocityInDouble * velocityInDouble);
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notifyListeners();
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}
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/**
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* E = c * m * delta T
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* c = spezifische Wärmekapazität Wasser 4,182 kJ/l
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* m = Masse
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* delta T = Temperaturunterschied
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*/
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void calculateLiterToHeatWater() {
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// 4182 J = 1l = 1000kg Waasser um 1° zu erwaermen
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// E/c/delta T = m
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//Total Energie = Potentielle Energie + Kinetische Energie
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literWaterToHeat = (potentialEnergy + kineticEnergy) / (4182 * 80);
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notifyListeners();
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}
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void calculateKgToHeatIron() {
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kilogrammIronToHeat = (potentialEnergy + kineticEnergy) / (460 * 680);
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notifyListeners();
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}
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}
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