A lecturer was giving a lecture to his student on stress management.
He raised a glass of water and asked the audience,
"How heavy do you think this glass of water is?"
The student answered ranged from 20-50gram.
It doesn't matter on the absolute weight. It depends on how long you hold it.
If I hold it for a minute, it???s OK
If I hold it for an hour, I will have an ache in my right arm.
If I hold it for a day, you will have to call the ambulance.
It is the exact same weight,....
