Question

Сосуд, наполненный водой, поставили на электроплитку, соответствующую току 5 А и присоединённую к сети напряжением 200 В. Какое количество теплоты передаётся сосуду от плитки за 10 минут? (кДж).

Answer 1

Q=U*I*t=220*5*600=660 кДж, время подставил в секундах.

Ответ: 660 кДж.

Answer 2

Calculation of Heat Transferred

To calculate the amount of heat transferred to the vessel from the electric stove, we can use the formula:

Q = I * V * t

Where: - Q is the heat transferred (in joules) - I is the current flowing through the stove (in amperes) - V is the voltage across the stove (in volts) - t is the time for which the stove is on (in seconds)

In this case, the current flowing through the stove is 5 A, the voltage across the stove is 200 V, and the time for which the stove is on is 10 minutes (or 600 seconds).

Plugging in these values into the formula, we can calculate the heat transferred:

Q = 5 A * 200 V * 600 s

Calculating this expression gives us the heat transferred in joules. To convert it to kilojoules (kJ), we divide the result by 1000.

Let's calculate the heat transferred:

Q = 5 A * 200 V * 600 s = 600,000 J = 600 kJ

Therefore, the amount of heat transferred to the vessel from the electric stove in 10 minutes is 600 kJ.

Please note that this calculation assumes that all the electrical energy is converted into heat and transferred to the vessel. In reality, there may be some losses due to inefficiencies in the system.