| Alaska Jones
can't believe how warm it is on the Florida beach. It's no place like Nome!
The sand is piled high, the sun is shining, and Alaska is baking.
Are you ready for a challenge? Alaska is under
12 kg of sand with a surface area of
Dessert is waiting, if you get this right! |
The temperature increase equals the
total energy delivered by the sun, less that reradiated, divided by the
specific heat capacity and the mass of sand. The energy retained is (1.4-1.3)
kJ/s x 7200 s = 720 kJ.
720 kJ / (12 kg x .84 kJ/(kg-C°) = 71.4 C°. The final temperature of the sand will be (37° C + 71.4 C°) = 108° C. That's hot! Dessert is served! |