Answer: a switch can do A, B and E
Explanation:
Answer:
$ 0.17
Explanation:
From the question given above, the following data were obtained:
Power (P) = 90 Watts
Time (t) = 1 day
Cost per KWh = $ 0.08
Cost of operation =?
Next, we shall convert 90 W to KW. This can be obtained as follow:
1000 W = 1 KW
Therefore,
90 W = 90 W × 1 KW / 1000 W
90 W = 0.09 KW
Next, we shall express 1 day in hour. This is shown below:
1 day = 24 hours
Next, we shall determine the energy consumption. This can be obtained as follow:
Power (P) = 0.09 KW
Time (t) = 24 h
Energy (E) =?
E = Pt
E = 0.09 × 24
E = 2.16 KWh
Finally, we shall determine the cost of operation. This can be obtained as follow:
Energy (E) = 2.16 KWh
Cost per KWh = $ 0.08
Cost of operation =?
Cost of operation = Energy × Cost per KWh
Cost of operation = 2.16 × 0.08
Cost of operation = $ 0.17
Thus, the cost of operating the light bulb for one day is $ 0.17
