# Find out how much solar energy reaches the surface of the Earth per square meter per second.(This…

Find out how much solar energy reaches the surface of the Earth per square meter per second.(This is called the solar constant. Maps of average solar energy per day per m2 can be found athttp://www.nrel.gov/gis/solar.html. )
(b) The present cost of electricity in the United States is in the range \$0.120.18kWh-1 (1kWhour =103 _3600 J). Assume that the eficiency of commercial solar cells is only about 10%, that theycan last 30 years and that they can produce power for 5 h day-1 on average. How much should1 m2 of solar cells cost so that the total energy it can produce amounts to about \$0.15

Find out how much solar energy reaches the surface of the Earth per square meter per second.(This is called the solar constant. Maps of average solar energy per day per m2 can be found athttp://www.nrel.gov/gis/solar.html. )
(b) The present cost of electricity in the United States is in the range \$0.120.18kWh-1 (1kWhour =103 _3600 J). Assume that the eficiency of commercial solar cells is only about 10%, that theycan last 30 years and that they can produce power for 5 h day-1 on average. How much should1 m2 of solar cells cost so that the total energy it can produce amounts to about \$0.15 kW h-1.(Make reasonable estimates of quantities not speciied.)

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