Measuring human digestive efficiency vs. a flame

From Applied Science.

"200 Calories" on a nutrition label doesn’t describe the total flammable caloric content. I explore the differences between digestible and flammable calories using a homemade calorimeter with glass windows.

Pressure sensor:

Schedule 160 pipe on McMaster:

32 ga nichrome wire:

Power supply (used for ignition wire):

Keithley 6.5 digit multimeter:

Tek MSO 4 series oscilloscope:


Hmm, I perhaps mis-remembered that 20% stat from Sally Le Page’s video: There may have been another source that indicated the 20% number. This will probably show up in my future video on macronutrients.

Support Applied Science on Patreon: