this post was submitted on 07 Jul 2023
220 points (98.7% liked)
Comic Strips
11685 readers
969 users here now
Comic Strips is a community for those who love comic stories.
The rules are simple:
- The post can be a single image, an image gallery, or a link to a specific comic hosted on another site (the author's website, for instance).
- The comic must be a complete story.
- If it is an external link, it must be to a specific story, not to the root of the site.
- You may post comics from others or your own.
- If you are posting a comic of your own, a maximum of one per week is allowed (I know, your comics are great, but this rule helps avoid spam).
- The comic can be in any language, but if it's not in English, OP must include an English translation in the post's 'body' field (note: you don't need to select a specific language when posting a comic).
- Politeness.
- Adult content is not allowed. This community aims to be fun for people of all ages.
Web of links
founded 1 year ago
MODERATORS
Hmmm let's see, you need roughly 2.39kcal or 10kJ of fuel a day.
Gasoline has an energy density of 45 MJ/kg.
https://energyeducation.ca/encyclopedia/Energy_density
Sciencing those together means you need 0.00022 kg or 0.22g of gasoline a day
Gasoline has a mass density of 0.7475 g/cm^3, more sciencing means you need 0.294 cm^3 of gasoline by volume.
https://www.engineeringtoolbox.com/fuels-densities-specific-volumes-d_166.html (average across range and convert to g/cm^3)
Here let's pull a number out of our butts, let's say a drop is a sphere with a diameter of 5mm, so the radius is 0.25cm. Volume is 4/3 pi r^3 which comes out to 0.065 cm^3/ drop.
0.294/0.065 gives 4.5 drops.
So you'd need 5 drops of gasoline to get your days worth of energy.
Seems we're off by a factor of a thousand. Most likely you doubled up on 1Calorie = 1000 calories. (Damnit food industry, what the hell?!?) 1kcal is already converted to the base calorie, as opposed to 1kCal.
https://www.ncbi.nlm.nih.gov/books/NBK234938/#:~:text=For%20men%20of%20reference%20body,women%2C%20it%20is%202%2C200%20kcal.
You are correct!
big Calories are conventionally uppercase, while small calories are conventionally lowercase. So 1 Calorie = 1000 calories = 1 kcal.
Stupid naming system, I know.