Question

Помогите пожалуйста ) и с объяснением) При подготовки к урокам в течение двух часов вы тратите около 800 кДж энергии.Восстановите ли вы запас энергии,если выпьете 200 мл обезжиренного молока и съедите 50 г пшеничного хлеба? Плотность обезжиренного молока равна 1036 кг/м^3

Answer 1

Мл переводишь в граммы, граммы в килограммы.
количество теплоты равно удельной теплоте на массу вещ-ва.
в итоге получится так, что будет хватать этих продуктов, чтобы восстановиться

Answer 2

Calculation of Energy Intake

To determine whether consuming 200 ml of skim milk and 50 g of wheat bread would replenish your energy reserves after spending two hours preparing for lessons, we need to calculate the energy intake from these food items.

First, let's convert the volume of skim milk from milliliters to kilograms using its density:

Density of skim milk: 1036 kg/m^3 Volume of skim milk: 200 ml

To convert the volume to kilograms, we divide it by 1000:

Volume of skim milk in kg: 200 ml / 1000 = 0.2 kg

Next, we need to determine the energy content of skim milk. The energy content of food is typically measured in kilocalories (kcal) or kilojoules (kJ). For this calculation, we'll use kilojoules.

Energy content of skim milk: 800 kJ Now, let's calculate the energy intake from consuming 200 ml of skim milk:

Energy intake from skim milk: 0.2 kg * 800 kJ/kg = 160 kJ

Similarly, we need to calculate the energy intake from consuming 50 g of wheat bread. However, we don't have the energy content of wheat bread available in the search results. To proceed, we'll assume an average energy content for wheat bread.

Assuming the average energy content of wheat bread is 250 kcal per 100 g, we can calculate the energy intake from consuming 50 g of wheat bread:

Energy content of wheat bread: 250 kcal/100 g

Energy intake from wheat bread: 50 g * (250 kcal/100 g) = 125 kcal

To convert kilocalories to kilojoules, we multiply by 4.184:

Energy intake from wheat bread in kJ: 125 kcal * 4.184 kJ/kcal = 522.5 kJ

Total Energy Intake

Now, let's calculate the total energy intake from consuming both skim milk and wheat bread:

Total energy intake: 160 kJ (from skim milk) + 522.5 kJ (from wheat bread) = 682.5 kJ

Therefore, by consuming 200 ml of skim milk and 50 g of wheat bread, you would replenish approximately 682.5 kJ of energy.

Please note that the energy content of food can vary depending on various factors such as brand, preparation method, and specific ingredients. The values used in this calculation are approximations and may not reflect the exact energy content of the specific food items you consume.

I hope this explanation helps! Let me know if you have any further questions.