Question

Определите температуру воды, установившуюся после смешивания 6кг воды при 42°с, 4кг воды при 72°с и 20 кг воды при 18°с

Answer 1

Вот подробно расписанный ответ,правда не уверена что правильно

Answer 2

Calculating the Final Temperature of the Mixed Water

To determine the final temperature of the mixed water, we can use the principle of conservation of energy, which states that the total heat gained is equal to the total heat lost.

Given: - 6 kg of water at 42°C - 4 kg of water at 72°C - 20 kg of water at 18°C

We can use the formula: m1 * c1 * (Tf - Ti) = -m2 * c2 * (Tf - Ti)

Where: - m1 and c1 are the mass and specific heat of the first substance - m2 and c2 are the mass and specific heat of the second substance - Tf is the final temperature - Ti is the initial temperature

Applying the Formula

Using the given temperatures and masses, we can apply the formula to calculate the final temperature of the mixed water.

Let's calculate the final temperature using the given values: - m1 = 6 kg, t1 = 42°C - m2 = 4 kg, t2 = 72°C - m3 = 20 kg, t3 = 18°C

6 * (Tf - 42) = -4 * (Tf - 72) - 20 * (Tf - 18)

Solving for the Final Temperature

By solving the equation, we can find the final temperature of the mixed water.