Physics
Physics, 17.07.2019 21:10, ninjapig647

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 1.00×104 hours, on the average, and costs $ 12.0 , whereas the incandescent bulb costs only 76.0 ¢, but lasts just 750 hours. the study assumed that electricity cost 8.00 ¢ per kwh and that the bulbs were on for 4.0 h per day.
(a) what is the total cost (including the price of the bulbs) to run each type of bulb for 3 years?
(b) how much do you save over 3 years if youuse a compact fluorescent bulb? (don’t forget that compact bulbs should not be thrown out in the trash but recycled! )
c) what is the resistance of a “100w” fluorescent bulb? (remember the actual rating is only 23w of power for a 120v circuit)

answer
Answers: 1

Other questions on the subject: Physics

image
Physics, 21.06.2019 18:10, zuleromanos
An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.
Answers: 2
image
Physics, 21.06.2019 20:00, jonathanvega424
What statements accurately describe atoms
Answers: 1
image
Physics, 22.06.2019 05:50, charlesrogers38
There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. what is the maximum road grade that your fully loaded ecv can climb?
Answers: 2
image
Physics, 22.06.2019 07:10, PastyMexican24
1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?
Answers: 3
Do you know the correct answer?
Compact fluorescent bulbs are much more efficient at producing light than are ordinary incandescent...

Questions in other subjects:

Konu
Mathematics, 05.05.2020 19:37
Konu
Computers and Technology, 05.05.2020 19:37