5. Draw a diagram, including the earth and sun, that shows why it is summer in t

Question

5. Draw a diagram, including the earth and sun, that shows why it is summer in the northern hemisphere

in July and winter in Jan; when is the longest and shortest day of the year, and why are these NOT in

July and Jan which seem to be the hottest and coldest months? 6.

A typical adult human diet is 2000 food Calories per day. How many watts is this? If you had to pay

the cost of an equivalent amount of electrical energy in a day, how much would that cost? (look up

the typical electric rates in the EIA website.)

5. Draw a diagram, including the earth and sun, that shows why it is summer in the northern hemisphere in July and winter in Jan; when is the longest and shortest day of the year, and why are these NOT in July and Jan which seem to be the hottest and coldest months? 6. A typical adult human diet is 2000 food Calories per day. How many watts is this? If you had to pay the cost of an equivalent amount of electrical energy in a day, how much would that cost? (look up the typical electric rates in the EIA website.)

Explanation / Answer

Answer 5.

Equinox

Variations in the length of daytime and night time from season to season are due to

  

Answer 6.

Since 1 calorie per day cal/d = 0.000048 watts W

So 2000 cal/d= 0.000048*2000 W

                          =0.096 W

                          =0.10 W or 1/10 W

                             (0.096/1000 = 0.000096 Kilowatthour.)

For November 2017 rate is 10.38 Cents per Kilowatthour.

So cost of an equivalent amount of electrical energy in an hour = 0.000096*10.38

And

So cost of an equivalent amount of electrical energy in a day = 0.000096*10.38*24= 0.02391552 cents

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