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An 11 W LED light bulb has an efficiency of 30 %. What amount of energy is wasted if the bulb is operated continuously for 1 minute?
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- A 30 W light bulb is left on for 8 hours overnight, how much energy was wasted?What is the useful energy output when a 60 W light bulb is on for 2 hours?Recall, traditional light bulbs are only 5% efficient.C7 21.) If a hair dryer is rated at 1300 W, how much energy does it require in 6 minutes? ____________________________ Wh
- If a 12V 4 W light bulb is plugged with a 6V battery, what is the electric power?Why is the answer not approx 0.58 kWh as P = (0.2)(120) = 24 W = 0.024 kW and if E = P*t then E = 0.024 kW * 24 h = 0.58 kWh? Is this not the correct answer? The solution above multiples 24 by 60? Why?Suppose a heart defibrillator consumes 425 j of energy in 10.5 ms. What is the average power output of the defibrillator, in W? 
- A 100 W electric bulb is used for 10 hours a day. How many units of energy are consumed in 30 days?How long does it take a 60 W lightbulb to use 4000 Joules of Energy?A light bulb uses up a power of 2.6 kW/hr. If the rate is Php153.42 per 1 kW/hr, and the light was on for 24 hours, a. How much kilowatt hour was consumed? b.How much was the bill after 24 hours?
- Your roommate leaves a 120 W fan running in your apartment. Over the course of an hour, how much thermal energy does the fan add to the air?How long must a 12 W compact fluorescent bulb be turned on to convert 18 kJ of electrical enrgy into light energy?A water jet consumes 450 W for 24 hours a day. What is the energy cost savings for this period if the water jet is switched off 8 hours a day? show a full detailed solution