Question

R=240 Ом U = 120 U=220 s=0.55

Answer 1

Сопротивление n параллельно соединённых проводником сопротивлением R равно R/n

Общее сопротивление R = 240/3 = 80 Ом

Сила тока i = U/R = 120/80 = 1.5 A

Мощность, потребляемая всеми лампами = Ui = 120 * 1.5 = 180 Вт

Энергия, израсходованная... = 180 Вт * 8 * 3600 с = 18*8*36 кДж = 5184 кДж ≈ 5.2 МДж

Answer 2

It seems like you provided a series of symbols and values without specifying what they represent. However, I can try to interpret them based on common electrical notation. Let's break it down:

1. R = 240 Ω: This represents the resistance (R) and its value is 240 ohms (Ω). Resistance is a measure of how much a material or device opposes the flow of electric current.

2. U = 120: This might represent voltage (U) with a value of 120 units. Voltage is the potential difference between two points in an electrical circuit and is usually measured in volts (V).

3. U = 220: It appears to be another voltage (U) with a value of 220 units.

4. s = 0.55: It's not clear what "s" represents, as it could have multiple meanings in different contexts. Without further context, it's difficult to interpret this value accurately.

If you can provide more information or context about what these values refer to or what you would like to know, I'd be happy to assist you further.