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23 Nov 2019

Why are lightbulbs marked with the units of power and not energy?What are some other common units used for power other than Watts.Can you calculate power from velocity? If so how?

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Lelia Lubowitz
Lelia LubowitzLv2
18 May 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

Suppose you have three identical lightbulbs, some wire, and a battery. You connect one lightbulb to the battery and take note of its brightness. You add a second lightbulb, connecting it in parallel with the previous lightbulbs, and again take note of the brightness. Repeat the process with the third lightbulb, connecting it in parallel with the other two. As the lightbulbs are added, what happens to (a) the brightness of the lightbulbs? (b) The individual currents in the lightbulbs? (c) The power delivered by the battery? (d) The lifetime of the battery? (Neglect the battery’s internal resistance.)

Assume you have a battery of emf E and three identical lightbulbs, each having constant resistance R. What is the total power delivered by the battery if the light-bulbs are connected
(a) in series and
(b) in parallel?
(c) For which connection will the lightbulbs shine the brightest? 

 

Assume you have a battery of emf ε and three identical lightbulbs, each having constant resistance R. What is the total power delivered by the battery if the light-bulbs are connected (a) in series and (b) in parallel? (c) For which connection will the lightbulbs shine the brightest?

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