at midday, solar energy strikes the earth with an intensity of about 1000. w/m2. what is the area of a solar collector that could collect 150 mj of energy in 1 h? this is roughly the energy content of 1 gallon of gasoline.



Answer :

41.67 m² is the area of a solar collector that could collect 150 mj of energy in 1 h.

Power received per unit surface is the definition of intensity.

[tex]I=P/A=1kW/m2(1)[/tex]

Power is simply defined as the rate at which energy changes over time.

[tex]P=\Delta E/\Delta t(2)[/tex]

ΔE = 150 MJ

Δt = 1 hour = 3600 sec.

[tex]P=150 MJ/3600 s=41.67 kW(3)[/tex]

Replacing (3) in (1), and solving for Area, we get:

Area = 41.67 m²

The measurement that indicates the size of a region on a plane or curved surface is called area. Surface area refers to the area of an open surface or the border of a three-dimensional object, whereas the area of a plane region or plane area refers to the area of a form or planar lamina.

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