Question

Консументами третьего порядка потреблена пища с запасом энергии 8000 кДж. Доля неусвоенной пищи составила 15%. На дыхание затратилось 45% усвоенной энергии, остальная на прирост. Определите, какая часть энергии усвоенной пищи (кДж) затратилась на прирост.

Answer 1

Доля неусвоенной пищи и дыхания затратилось составила 60%( 15%+ 45%) , значит на прирост ушло 40% энергии.
Методом пропорции выясняем какая часть  энергии
усвоенной пищи (кДж) затратилась на прирост

 

8000кДж _______________ 100%

Х кДж       _______________40%

Х=8000 Х40 / 100

Х=3200кДж

Ответ: 3200кДж затратилось на прирост

 

Answer 2

Calculation of Energy Expenditure

To determine the portion of energy from the consumed food that was used for growth, we can follow these steps:

1. Calculate the Total Energy Consumed: The total energy consumed is 8000 kJ.

2. Calculate the Unabsorbed Portion of Food: The unabsorbed portion of food is 15% of the total energy consumed.

3. Calculate the Energy Expended on Breathing: The energy expended on breathing is 45% of the absorbed energy.

4. Calculate the Energy Used for Growth: The energy used for growth is the remaining portion of the absorbed energy after deducting the energy expended on breathing.

Let's calculate the energy used for growth step by step.

Step 1: Calculate the Total Energy Consumed

The total energy consumed is 8000 kJ.

Step 2: Calculate the Unabsorbed Portion of Food

The unabsorbed portion of food is 15% of the total energy consumed. - Unabsorbed energy = 8000 kJ * 15% - Unabsorbed energy = 8000 kJ * 0.15 - Unabsorbed energy = 1200 kJ

Step 3: Calculate the Energy Expended on Breathing

The energy expended on breathing is 45% of the absorbed energy. - Absorbed energy = Total energy consumed - Unabsorbed energy - Absorbed energy = 8000 kJ - 1200 kJ - Absorbed energy = 6800 kJ - Energy expended on breathing = 6800 kJ * 45% - Energy expended on breathing = 6800 kJ * 0.45 - Energy expended on breathing = 3060 kJ

Step 4: Calculate the Energy Used for Growth

The energy used for growth is the remaining portion of the absorbed energy after deducting the energy expended on breathing. - Energy used for growth = Absorbed energy - Energy expended on breathing - Energy used for growth = 6800 kJ - 3060 kJ - Energy used for growth = 3740 kJ

Conclusion: The portion of energy from the consumed food that was used for growth is 3740 kJ.