How do people who make hourglasses know how much sand to put in for the amount of time they want ?
In: Other
This is often done through a process called testing.
A set volume of sand can be measured with how long it takes to fall. You can then use math to figure out the exact volume needed for a certain time.
Once this is known, assuming you have a consistent hole, you can mass produce hourglasses with this volume of sand.
Latest Answers