A metre rod on wedge is example of unstable equilibrium. why

The set up will not return to its original position once the applied force is removed

Explanation:

An unstable equilibrium is a type of equilibrium in which the set up does not return to its original position once the applied force is removed.

The way the set up in the diagram is arranged, if there is any slight disturbance which removes the applied force, the metre rule will tilt towards the right and remain that way. This is because of the presence of the weight on the right side of the metre rule. This, therefore, makes the set up unstable.

in 342 bc j._c. egypt fell into the hands of the persians, under the reign of nectanebo ii

greek city-states unite in a revolt against the persian empire at the beginning of the fifth century bc. j.-c  

from the year 660 or 659 bc ad, cyrus preached the revolt against the medes to deliver the persians.

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.