A 70 W outdoor security light burns, on average, 10 hours a day. A new bulb costs Php 30.00, and the lifetime is about 1000 hours. If electricity costs PhP 5.00 per kW·h, what is the yearly price of “security,” per light? (1 year = 365 days)

A 70 W outdoor security light burns, on average, 10 hours a day. A new bulb costs Php 30.00, and the lifetime is about 1000 hours. If electricity costs PhP 5.00 per kW·h, what is the yearly price of “security,” per light? (1 year = 365 days)

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter22: Electric Current

Section22.2: Using Electric Energy

Problem 31PP

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