Initial guess : 1000 grains
Like all good questions this one only raised more. What is the packing efficiency of sugar? How big is a grain of sugar? How big is a teaspoon? After a few minutes of Googling I found these answers:
- Size of teaspoon of sugar: 4 g
- Diameter of a grain of sugar: 700 µm = 0.7 mm
- Packing efficiency of sugar (or sand): 55-60%
- Density of sugar: 700 kg/m3 =0.0007 g/mm3
Answer: 18,136 grains
That’s a lot of grains.
Follow up question: How long would the line of sugar be if you lined the grains up in a row?
Answer: 18,136 grains x 0.7 mm = 12.7 m