John uses a 9 W light bulb in his bedroom which he turns on before going to sleep and then turns off 8 hours later. Determine the amount of savings (in Philippine Peso) John will make in a month if he replaces this bulb with a 1 W LED night light. The energy cost is PhP 9.50 per kWh. Round off to the nearest hundredth digit.
John uses a 9 W light bulb in his bedroom which he turns on before going to sleep and then turns off 8 hours later. Determine the amount of savings (in Philippine Peso) John will make in a month if he replaces this bulb with a 1 W LED night light. The energy cost is PhP 9.50 per kWh. Round off to the nearest hundredth digit.
Chapter16: Electromagnetic Waves
Section: Chapter Questions
Problem 53P: At what distance does a 100-W lightbulb produce the same intensity of light as a 75-W lightbulb...
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John uses a 9 W light bulb in his bedroom which he turns on before going to sleep and then
turns off 8 hours later. Determine the amount of savings (in Philippine Peso) John will make in
a month if he replaces this bulb with a 1 W LED night light. The energy cost is PhP 9.50 per
kWh. Round off to the nearest hundredth digit.
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