Physics
The cooling by a desert Cooler is based on:

Air Rehydration
Hot air replacement
Air dehydration
Evaporative Cooling

ANSWER DOWNLOAD EXAMIANS APP

Physics
Stationary wave is formed by

A transverse wave superposing a longitudinal wave
Two waves of the same speed superposing
Two waves of same frequency travelling in the opposite direction
Two waves of same frequency travelling in the same direction

ANSWER DOWNLOAD EXAMIANS APP