AboutAbe Mantell Expertise Hello, I am a college professor of mathematics and regularly teach all levels from elementary mathematics through differential equations, and would be happy to assist anyone with such questions!
Experience Over 15 years teaching at the college level.
Organizations belong to NCTM, NYSMATYC, AMATYC, MAA, NYSUT, AFT.
Education/Credentials B.S. in Mathematics from Rensselaer Polytechnic Institute
M.S. (and A.B.D.) in Applied Mathematics from SUNY @ Stony Brook
An electric light bulb, for example marked “ 60 watts“, indicates that the bulb uses 60 watt-hours of electricity in one hour.
I can understand that the bulb uses 60 watts of electricity per hour, but I am confused by the 60 watt-hours per hour. How are watt-hours determined to get watt-hours per hour?
I thank you for your reply.
Answer Hello Kenneth,
Well, if the bulb consumes 60 watt-hrs of power in one hour, then the
rate of power consumption is 60 watt-hrs per hour. If this bulb were
on for 3 hours, for example, then the total power consumption would be
60 watt-hrs/hr * 3 hrs = 180 watt-hrs.
