Question

ТЕКСТ ЗАДАНИЯ Какую энергию передаёт окружающей среде электрический камин, сопротивлением 50 Ом за 20 мин, если по спирали электрического камина протекает ток равный 3 А? ЗАГРУЗКА ФАЙЛОВ Добавить файл Назад Впередочень срочноооо

Answer 1

Ответ: 540кДж

Объяснение:

Дано:

R=50 Ом

t=20мин=1200с

I=3А

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Q-?

Q=I²Rt=3²*50*1200=540000Дж=540кДж

Answer 2

Calculation of Energy Transferred by an Electric Fireplace

To calculate the energy transferred by an electric fireplace to the surrounding environment, we can use the formula:

Energy (E) = Power (P) x Time (t)

The power (P) can be calculated using Ohm's Law:

Power (P) = Current (I) x Voltage (V)

Given that the resistance (R) of the electric fireplace is 50 Ohms and the current (I) passing through the spiral of the electric fireplace is 3 Amperes, we can calculate the voltage (V) using Ohm's Law:

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

Let's calculate the voltage first:

Voltage (V) = 3 A x 50 Ω = 150 V

Now, we can calculate the power:

Power (P) = 3 A x 150 V = 450 W

Finally, we can calculate the energy transferred by the electric fireplace in 20 minutes:

Energy (E) = 450 W x 20 min = 9000 J

Therefore, the electric fireplace transfers 9000 Joules of energy to the surrounding environment in 20 minutes.