A gas doesn't have a fixed shape because the amount of space between the molecules in gas can change easily. B. the particles are not compressible
It is called air pressure
A rainbow. Dispersion is the splitting of radiation into it's different wavelengths.
Answer:
a

b

Explanation:
From the question we are told that
The number of identical drippers is n = 60
The diameter of each hole in each dripper is
The diameter of the main pipe is 
The speed at which the water is flowing is 
Generally the amount of water used in one hour = 3600 seconds is mathematically represented as

Here A is the area of the main pipe with value

=> 
=> 
So
=> 
=> 
Generally the area of the drippers is mathematically represented as

=> 
=> 
Generally from continuity equation we have that

=> 
=> 
The more separation two objects have, the more the force between them decreases. When mass 1 increases the force between the objects increases. If Mass 2 decreases, the force between the objects decreases.