contestada

in a certain city,electricity costs .10 per K.W.h. what is the annual cost dor electricity to power a lamppost for 5 hours/day with a 100 watt incandescent light bulb

Respuesta :

znk

The annual cost is $18.25.

Step 1. years → days

1 yr × (365 days/1 yr) = 365 days

Step 2. days → hours.

365 days × (5 h/1 day) = 1825 h

Step 3. hours → watt-hours

1825 h × 100 W = 182 500 W·h

Step 4. watt-hours → kilowatt-hours

182 500 W·h × (1kW·h/1000 W·h) = 182.5 kW·h

Step 5. kilowatt-hours → dollars

182.5 kW·h × ($0.10/1 kW·h) = $18.25

Otras preguntas