Question

The amount of energy the earth receives from the sun, per year is

• A. 1000 k calories
• B. 10\times10^{30} calaories
• C. 5\times10^{20} calaories
• D. 10\times10^{23} calaories

Answer 1

The correct option is A 1000 k calories

The sun's surface emits about 63 million watts of energy per square meter. By the time it reaches the Earth, after traveling 150 million kilometers, or 93 million miles, it has dimnished to 1,370 watts per square meter which are equal to thousand of kilocalories.

so, the correct option is '1000 Kcalories'.