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The average value for the solar constant in Ireland is 1.2 × 10^3 W m² - Leaving Cert Physics - Question c - 2006

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The average value for the solar constant in Ireland is 1.2 × 10^3 W m². What is the average energy falling normally on an area of 5 m² of ground in Ireland in 1 minu... show full transcript

Worked Solution & Example Answer:The average value for the solar constant in Ireland is 1.2 × 10^3 W m² - Leaving Cert Physics - Question c - 2006

Step 1

Calculating Energy per Second on 5 m²

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Answer

To find the energy falling on an area of 5 m² in one second, use the formula:

extEnergy=extSolarConstantimesextArea=(1.2imes103extWm−2)imes(5extm2)=600extJ ext{Energy} = ext{Solar Constant} imes ext{Area} = (1.2 imes 10^3 ext{ W m}^{-2}) imes (5 ext{ m}^2) = 600 ext{ J}

Thus, the energy per second on 5 m² is 600 J.

Step 2

Calculating Energy for 1 Minute

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Answer

To find the average energy falling on the same area in one minute, we multiply the energy per second by the number of seconds in one minute:

extEnergyfor1minute=600extJimes60exts=36000extJ ext{Energy for 1 minute} = 600 ext{ J} imes 60 ext{ s} = 36000 ext{ J}

Therefore, the average energy falling normally on an area of 5 m² of ground in Ireland in 1 minute is 36,000 J (or 3.60 × 10^4 J).

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