Physics, 10.09.2019 02:30 chickennuggets0621
Consider an ordinary 100w incandescent light bulb and a led light bulb that produces the same amount of light, but consumes 20w of electricity. assuming the values for purchase price and lifetime for each bulb, and a cost of electricity as given below, compute the number of hours of usage required for the led light bulb to become more cost-effective than the incandescent bulb for each case below. if the crossover in cost occurs because a new bulb must be purchased, you may take the number of hours to be equal to the time at which the bulb must be purchased. note: one year of moderate usage corresponds to ~1000 hours.
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Physics, 22.06.2019 03:00
1. a net force of 100 newton’s is applied to a wagon for 5 seconds. this causes the wagon to undergo a change in momentum of
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Physics, 22.06.2019 10:10
Apair of 10μf capacitors in a high-power laser are charged to 1.7 kv.a. what charge is stored in each capacitor? b. how much energy is stored in each capacitor?
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Physics, 22.06.2019 18:00
Aprisoner is forced to go into one of three rooms, but he can choose which room. the first room is ablaze with fire. the second one is rigged with explosives that will go off as soon as he enters. the third contains a pair of lions who haven't eaten in years. which room should he choose to survive?
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Physics, 22.06.2019 21:00
Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.
Answers: 1
Consider an ordinary 100w incandescent light bulb and a led light bulb that produces the same amount...
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