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    aguizar494's Avatar
    aguizar494 Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Nov 7, 2013, 05:49 PM
    Consider the energy consumed by a 300 W light bulb in an hour. How many flights of sta
    Consider the energy consumed by a 300 W
    Light bulb in an hour.
    How many flights of stairs would you have
    To climb to equal the work of the lightbulb?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #2

    Nov 7, 2013, 05:51 PM
    Depends on how many steps in a stairway. How many watts of energy are generated by climbing the stairs? Google that.
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #3

    Nov 8, 2013, 06:48 AM
    Work of the light bulb = power times time, and work against force of gravity = mgh. You haven't given the mass of the person climbing the stairs, so perhaps they want you to use an estimate for a "typical" person. With that you can find the value of 'h', and then to convert to flights of stairs you ned to estimate the height of a "typical" flight of stairs.
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