65 lines
1.8 KiB
Dart
65 lines
1.8 KiB
Dart
import 'package:flutter/material.dart';
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class EnergyModel with ChangeNotifier {
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final double weightForce = 9.81;
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final double _waterStartTemp = 20.0;
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final double _waterEndTemp = 100.0;
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final double _waterHeatCapacity = 4.183;
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final double _ironStartTemp = 20.0;
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final double _ironEndTemp = 700.0;
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final double _ironHeatCapacity = 0.444;
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double heightStart = 0.0;
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double heightEnd = 0.0;
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double velocityStart = 0.0;
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double velocityEnd = 0.0;
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double weight = 0.0;
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double totalEnergy = 0.0;
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double boilingWaterAmount = 0.0;
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double annealingIronAmount = 0.0;
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double calcPotentialEnergy(m, g, h) {
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return m * g * h;
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}
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double calcPotentialEnergyBetweenTwoPointsInJoule(
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heightStart, heightEnd, weight) {
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return calcPotentialEnergy(weight, weightForce, heightStart) -
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calcPotentialEnergy(weight, weightForce, heightEnd);
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}
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double calcKineticEnergy(m, v) {
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return (m * v * v) / 2.0;
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}
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double calcKineticEnergyBetweenTwoPointsInJoule(
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velocityStart, velocityEnd, weight) {
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return calcKineticEnergy(weight, velocityEnd) -
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calcKineticEnergy(weight, velocityStart);
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}
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void calcBoilingWaterAmount() {
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boilingWaterAmount = (totalEnergy /
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(_waterHeatCapacity * (_waterEndTemp - _waterStartTemp)));
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}
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void calcIronAnnealingAmount() {
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annealingIronAmount =
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(totalEnergy / (_ironHeatCapacity * (_ironEndTemp - _ironStartTemp)));
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}
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void calcTotalEnergyInKiloJoule() {
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totalEnergy = (calcKineticEnergyBetweenTwoPointsInJoule(velocityStart, velocityEnd, weight) +
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calcPotentialEnergyBetweenTwoPointsInJoule(heightStart, heightEnd, weight))
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/1000;
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}
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void calc() {
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calcTotalEnergyInKiloJoule();
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calcBoilingWaterAmount();
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calcIronAnnealingAmount();
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notifyListeners();
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}
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}
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