Question

Disadvantages of hourglass

Answer 1

1.you can not get exact time.
2.it is short duration clock.
3.you have to upright it after a particular period of time.
4.it is a primitive style of watching time.

hope it helps.

Answer 2

Answer:

1. The hour glass had to be put up side down every time after an hour.

2. It cannot tells us accurate time.