@Benedikt: "I wonder how much a Joule of energy is, these days... " Love it!
Here's one approach, can be modified. Lab grade sucrose is about $10/kg.
(1) According to Wikipedia, the (metabolic) energy content of sucrose is 17 kJ/g = 17 MJ/kg. So looks like 1 J is about $0.0000006 = $6E(-7) = 600 nanodollars.
(2) However, the rest mass energy of 1 kg of sucrose (well, anything) is 9E16 J. So looks like 1 J is about $1E(-16).
Sounds like you all are having a great time this session! I've been having a great time reading.
Once upon a time I knew the items with the most calories/cent in the Aubert Hall vending machine. (Poptarts, in case you were wondering). I'm really glad those days are over. . .
Rachel and I went to Whole Foods today and we saw a poster that said "Eating for Energy" near the burritos. I wonder how one eats against energy? (I took a picture of the sign but I don't think I can upload a picture in a comment!)
And it's in the Whole Body section.
ReplyDelete@Benedikt: "I wonder how much a Joule of energy is, these days... " Love it!
ReplyDeleteHere's one approach, can be modified. Lab grade sucrose is about $10/kg.
(1) According to Wikipedia, the (metabolic) energy content of sucrose is 17 kJ/g = 17 MJ/kg. So looks like 1 J is about $0.0000006 = $6E(-7) = 600 nanodollars.
(2) However, the rest mass energy of 1 kg of sucrose (well, anything) is 9E16 J. So looks like 1 J is about $1E(-16).
Sounds like you all are having a great time this session! I've been having a great time reading.
Once upon a time I knew the items with the most calories/cent in the Aubert Hall vending machine. (Poptarts, in case you were wondering). I'm really glad those days are over. . .
ReplyDeleteRachel and I went to Whole Foods today and we saw a poster that said "Eating for Energy" near the burritos. I wonder how one eats against energy? (I took a picture of the sign but I don't think I can upload a picture in a comment!)
ReplyDelete