FA#5-Television, part II

To solve this question, we must figure out how many years it takes the galaxy to make one rotation (~220,000,000 years). Next we must convert this number to hours (1 years = 8,765.81277 hours). We have a total of 1,928,478,809,565 hours. Now we have to take Turn Off Your T.V. week into account. At a rate of 1 week = 168 hours, 220,000,000 weeks = 36,960,000,000 hours. Subtract our Turn Off Your T.V. week hours from the total (1,891,518,809,565 hours). Multiply the number of hours by the total kilowatts/hour the televisions of the U.S.A. consume (106,443,900*1,891,518,809,565=2.01340639E20). One step left; convert kw to watts (2.01E23). FA#5 = 23.

FA#4-Television

To solve this, first take the number of televisions per capita in the U.S. (~702.6/1000) and multiply that by the number of people in the U.S (~303,000,000). The answer is 212,887,800. Next, multiply the number of televisions by the amount of power a single television consumes (~.5 kw/h). The answer is 106,443,900 (~1.06E8) kw, so FA#4=8.

FA#3-Leaves, Part II

Sorry about the hiatus; here's the answer to the most recent FQ. Multiply the amount of leaves (~10,000) by their mass per leaf (0.45359237 kg/leaf)(source). The answer is 4,535.9 kg, which is the total mass of the leaves. Multiply the total mass of the leaves by their energy output per kilogram (1,000,000 Joules/kg). Our answer comes to 4,535,900,000 Joules. Just one more step; convert Joules to (chemist's) calories. The answer is 1.08410612 × 10E9, so FA#3 is 9.

FA#2-Leaves

Estimate the average area of an American lawn (~200 sq.m) and multiply that by an estimated number of leaves per square meter (~50 leaves/sq.m). 200*50=10,000 or 1E4, so FA#2 is 4.

FA #1-Black Friday

Take the population of America (~300,000,000) and multiply that by the fraction of Americans who will go shopping (24/100). The answer is: 300,000,000*(24/100)=72,000,000 or 7.2E7. So FA#1 = 7.