Question

Consider a cloudless day on which the sun shines down across the United States. If 2278 kJ2278 kJ of energy reaches a square meter (m2)(m2) of the United States in one hour, how much total solar energy reaches the entire United States per hour? The entire area of the United States is 9,158,960 km29,158,960 km2 .

Answer 1

Answer:

Total solar energy reaches the entire United States per hour is$2.0864\times 10^{16}$ kilo Joules.

Explanation:

Amount of energy reaching 1 square meter of area = 2278 kJ/hour

Total area of the United States = $9,158,960 km^2=9,158,960\times 10^6 m^2$

$(1 km^2=10^6 m^2)$

Amount of energy reaching $9,158,960\times 10^6 m^2$ of area:

$2278 kJ/hour\times 9,158,960\times 10^6 kJ/hour$

$=2.0864\times 10^{16} kJ/Hour$

Total solar energy reaches the entire United States per hour is$2.0864\times 10^{16}$ kilo Joules.