58 lines
1.6 KiB
Dart
58 lines
1.6 KiB
Dart
import 'dart:math';
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import 'package:flutter/material.dart';
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class CalculateModels extends ChangeNotifier {
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double _startVelocity = 0;
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double _endVelocity = 0;
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double _startHeight = 0;
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double _endHeight = 0;
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double _weight = 0;
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final double _gravity = 9.81; //in m/s^2
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final double _waterHeatCapacity = 4.181; //J / (g * C°)
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final double _ironHeatCapacity = 0.439; //in J / (g * C°)
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double _waterTemparatureStart = 20; //in °C
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final int _temparatureToBoilWater = 100; //in °C
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double _ironTemparatureStart = 20; //in °C
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final int _temparatureToMakeIronGlow = 700; //in °C
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double get deltaVelocity => _endVelocity - _startVelocity;
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double get deltaHeight => _endHeight - _startHeight;
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double get potentialEnergy => _weight * _gravity * deltaHeight; //in Joule = m^2 kg/s^2
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double get kineticEnergy => _weight * pow(deltaVelocity, 2) / 2;
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double get amountOfBoilingWaterInL => (((potentialEnergy + kineticEnergy) / _waterHeatCapacity) / (_temparatureToBoilWater - _waterTemparatureStart)) / 1000; //in litre
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double get amountOfGlowingIronInKg => (((potentialEnergy + kineticEnergy) / _ironHeatCapacity) / (_temparatureToMakeIronGlow - _ironTemparatureStart)) / 1000;
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void setStartVelocity(double v){
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_startVelocity = v;
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notifyListeners();
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}
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void setEndVelocity(double v){
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_endVelocity = v;
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notifyListeners();
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}
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void setStartHeight(double h){
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_startHeight = h;
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notifyListeners();
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}
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void setEndHeight(double h){
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_endHeight = h;
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notifyListeners();
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}
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void setWeight(double m){
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_weight = m;
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notifyListeners();
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}
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} |