Erosion of the beach is normally a slow process. What is one factor involved in this erosion?

A) animal motion
B) changing tides
C) emptying rivers
Eliminate
D) building coral reefs

When a neutral charge, comes into contact with a positive charge they repel each other nothing happens the neutral charge becomes negative they attract each other

There are weak or strong attractive forces between atoms of liquids with a high viscosity

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?