Question

СРОЧНО УМОЛЯЮЮЮ ФІЗИКА: Визначте на яку потужність розрахована електрична праска,якщо за 10 хвилин вона виділяє 0.6МДж теплоти. Визначте її опір, Якщо відомо,що сила струму в мережі 16А

Answer 1

Ответ:

Объяснение
дано
t=10xв=600с
А=600000Дж
І=16А
Р-?
R-?
Розв'язання:
А=UIt
U=A/It
U=600000дж/16А*600с=62.5 В
R=U/t
R=62,5/600c =0.1 Om
P=U*t
P=62.5 B*600c=1000 Вт

Answer 2

Electric Iron Power Calculation:

To determine the power of an electric iron, we can use the formula:

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

In this case, the energy released by the iron is given as 0.6 MJ (megajoules) and the time is 10 minutes, which is equivalent to 600 seconds.

Substituting the values into the formula, we get:

Power (P) = 0.6 MJ / 600 s

To calculate the power, we need to convert the energy from megajoules to joules since the unit of power is watts (W), which is equivalent to joules per second (J/s).

Converting 0.6 MJ to joules, we get:

0.6 MJ = 0.6 * 10^6 J

Now, we can calculate the power:

Power (P) = (0.6 * 10^6 J) / 600 s

Calculating this expression, we find:

Power (P) = 1000 W

Therefore, the electric iron is designed to operate at a power of 1000 watts or 1 kilowatt (kW).

Calculation of Resistance:

To determine the resistance of the electric iron, we can use Ohm's law, which states that the resistance (R) is equal to the voltage (V) divided by the current (I):

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

In this case, the current in the circuit is given as 16 A (amperes).

To calculate the resistance, we need to know the voltage across the iron. If the voltage is not provided, we cannot determine the resistance using the given information.

Please provide the voltage across the iron