Question

Помогите!!! В паспорте электрического утюга написано "220 в, 600 вт". Какое количество теплоты выделится в утюге за 2 часа работы при напряжении в сети 220 в?

Answer 1

T=7200 c, u=220 B. N=600 Вт, Q-?; Решение: Q=I^2 Rt, I=U/R по закону Ома, R=U/I,N=UI, Q=UIt =Nt=600*7200=4320000 Дж =4,32МДж

Answer 2

Calculating Heat Generated by the Iron

To calculate the amount of heat generated by the iron, we can use the formula:

Heat (in joules) = Power (in watts) × Time (in seconds)

Given that the power of the iron is 600 watts and the time is 2 hours, we can calculate the heat generated.

Calculation

Using the given values: - Power (P) = 600 watts - Time (T) = 2 hours = 7200 seconds (1 hour = 3600 seconds)

We can calculate the heat using the formula: Heat = Power × Time

Substituting the values: Heat = 600 watts × 7200 seconds

Result

Calculating the heat generated: Heat = 4320000 joules

Therefore, the amount of heat generated by the iron in 2 hours of operation at a voltage of 220V is 4320000 joules.