Question

Две спирали электроплитки одинакового сопротивления соединены параллельно и включены в сеть с напряжением 220В. . Чему равно сопротивление спирали плитки, если вода массой 2 кг налитая в алюминиевую кастрюлю массой 200г закипела через 37 секунд?Начальная температура воды и кастрюли равна 20градусов, Потерями энергии на нагревание окружающего воздуха пренебречь. Уд. теплоемкость воды = 4200дж/кг*С , аллюминия 900 дж/кг*С. Помогите

Answer 1

Две спирали электроплитки одинакового сопротивления соединены параллельно и включены в сеть с напряжением 220В. . Чему равно сопротивление спирали плитки, если вода массой 2 кг налитая в алюминиевую кастрюлю массой 200г закипела через 37 секунд?Начальная температура воды и кастрюли равна 20градусов, Потерями энергии на нагревание окружающего воздуха пренебречь. Уд. теплоемкость воды = 4200дж/кг*С , аллюминия 900 дж/кг*С.

Answer 2

Calculation of Resistance of the Electric Stove Coil

To calculate the resistance of the electric stove coil, we need to use the formula:

Resistance (R) = Voltage (V) / Current (I)

In this case, the voltage is given as 220V. However, we need to find the current flowing through the coil to calculate the resistance. To find the current, we can use Ohm's Law:

Current (I) = Voltage (V) / Total Resistance (R_total)

Since the two coils are connected in parallel, the total resistance can be calculated using the formula:

1 / R_total = 1 / R1 + 1 / R2

Where R1 and R2 are the resistances of the two coils.

Now, let's calculate the resistance of the electric stove coil step by step.

1. Find the current flowing through the coil: - Current (I) = Voltage (V) / Total Resistance (R_total)

2. Calculate the total resistance of the two coils: - 1 / R_total = 1 / R1 + 1 / R2

3. Calculate the resistance of each coil: - Resistance (R) = Voltage (V) / Current (I)

Let's proceed with the calculations.

Calculation Steps:

Step 1: Find the current flowing through the coil: - Current (I) = Voltage (V) / Total Resistance (R_total)

Step 2: Calculate the total resistance of the two coils: - 1 / R_total = 1 / R1 + 1 / R2

Step 3: Calculate the resistance of each coil: - Resistance (R) = Voltage (V) / Current (I)

Step 1: Find the current flowing through the coil:

The current flowing through the coil can be calculated using Ohm's Law:

Current (I) = Voltage (V) / Total Resistance (R_total)

Since the voltage is given as 220V, we need to find the total resistance first.

Step 2: Calculate the total resistance of the two coils:

The total resistance of the two coils connected in parallel can be calculated using the formula:

1 / R_total = 1 / R1 + 1 / R2

Unfortunately, the specific resistances of the two coils (R1 and R2) are not provided in the question. Without this information, it is not possible to calculate the total resistance and proceed with the calculation.

Please provide the specific resistances of the two coils (R1 and R2) so that we can continue with the calculation.