Compact fluorescent bulbs are much more efficient at producing light than are ordinary incandescent bulbs. They initially cost much more, but last far longer and use much less electricity. According to one study of these bulbs, a compact bulb that produces as much light as a 100 W incandescent bulb uses only 23.0 W of power. The compact bulb lasts 10000 hours, on average, and costs $12.00, whereas the incandescent bulb costs only $0.73, but lasts just 750 hours. The study assumed that electricity costs $0.070 per kilowatt hour and that the bulbs were on for 4.0 hours per day. (A) what is the total cost (including the price of the bulbs) th run and incandescent bulbs for 3.0 years? (B) what is the total cost (including the price of the bulbs) to run compact fluorescent bulbs for 3.0 years? (C) how much do you save over 3.0 years if you use a compact fluorescent bulb instead of an incandescent bulb? (D) what is the resistance of a "100 W" fluorescent bulb? (Remember, it actually uses only 23 W of power and operates across 120 V)
Ohm's law
Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.
Path of Least Resistance
In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.
Compact fluorescent bulbs are much more efficient at producing light than are ordinary incandescent bulbs. They initially cost much more, but last far longer and use much less electricity. According to one study of these bulbs, a compact bulb that produces as much light as a 100 W incandescent bulb uses only 23.0 W of power. The compact bulb lasts 10000 hours, on average, and costs $12.00, whereas the incandescent bulb costs only $0.73, but lasts just 750 hours. The study assumed that electricity costs $0.070 per kilowatt hour and that the bulbs were on for 4.0 hours per day. (A) what is the total cost (including the price of the bulbs) th run and incandescent bulbs for 3.0 years? (B) what is the total cost (including the price of the bulbs) to run compact fluorescent bulbs for 3.0 years? (C) how much do you save over 3.0 years if you use a compact fluorescent bulb instead of an incandescent bulb? (D) what is the resistance of a "100 W" fluorescent bulb? (Remember, it actually uses only 23 W of power and operates across 120 V)
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