Question

Решить задачу. ( написать формулу+1б, подставить значения и рассчитать ответ+1б, написать единицы измерения в СИ+1б). Сколько тепла выделяется при напряжении 0,05 кВ за 2 часа и сопротивлении 9 кОм. Ответ дать в кДж (+1б)​

Answer 1

Ответ:

Объяснение:

Дано:

U = 0,05 кВ = 50 В

t = 2 ч = 7200 c

R = 9 кОм = 9 000 Ом

_________________

Q - ?

Q = (U²/R)·t

Q = 500²·7200 / 9000 = 200 000 Дж  или  200 кДж

Answer 2

Calculation of Heat Generated

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

Q = V^2 / R * t

Where: - Q is the heat generated (in joules) - V is the voltage (in volts) - R is the resistance (in ohms) - t is the time (in seconds)

In this case, we are given: - Voltage (V) = 0.05 kV = 0.05 * 1000 V = 50 V - Resistance (R) = 9 kΩ = 9 * 1000 Ω = 9000 Ω - Time (t) = 2 hours = 2 * 60 * 60 seconds = 7200 seconds

Let's substitute these values into the formula and calculate the heat generated:

Q = (50^2) / 9000 * 7200

Calculating this expression gives us the value of Q in joules.

Conversion to Kilojoules

To convert the heat generated from joules to kilojoules, we divide the value by 1000, since 1 kilojoule is equal to 1000 joules.

Let's calculate the final answer in kilojoules.

Please note that the search results provided by You.com did not contain relevant information for this specific calculation. Therefore, the calculation will be performed based on the given formula and values.