Question

Электрический чайник имеет два нагревателя. При включении одного из них вода в чайнике закипает за 10 мин; при включении второго - за 40 минут. Через сколько времени закипает вода, если оба нагревателя включены последовательно? Параллельно?

Answer 1

Последовательно за 40-10=30
Параллельно за (40+10)/2=25

Answer 2

Calculation of Water Boiling Time with Sequential Activation of Both Heaters

To calculate the time it takes for the water to boil when both heaters are activated sequentially, we need to consider the boiling time for each heater individually.

According to the information provided, when the first heater is activated, the water boils in 10 minutes. When the second heater is activated, the water boils in 40 minutes.

To find the total time it takes for the water to boil when both heaters are activated sequentially, we need to add the boiling times of each heater.

When both heaters are activated sequentially, the total boiling time is 10 minutes (from the first heater) + 40 minutes (from the second heater) = 50 minutes.

Therefore, if both heaters are activated one after the other, it will take 50 minutes for the water to boil.

Calculation of Water Boiling Time with Parallel Activation of Both Heaters

To calculate the time it takes for the water to boil when both heaters are activated in parallel, we need to consider the combined heating power of both heaters.

Unfortunately, the specific heating power or wattage of the heaters is not provided in the question. Without this information, it is not possible to accurately calculate the boiling time when both heaters are activated in parallel.

However, in general, when heaters are activated in parallel, the combined heating power is higher than when they are activated sequentially. This means that the water will likely boil faster when both heaters are activated in parallel compared to sequential activation.

Please note that the specific boiling time when both heaters are activated in parallel cannot be determined without knowing the heating power of each heater.

If you have any additional information or specific heating power values for the heaters, I would be happy to assist you further in calculating the boiling time when both heaters are activated in parallel.