<span>division of Earth's history into time units based largely on the types of life-forms that lived only during certain periods.</span>
Answer:
The charge on the dust particle is 
Explanation:
From the question we are told that
The length is 
The width is 
The charge is 
The mass suspended in mid-air is 
Generally the electric field on the carpet is mathematically represented as

Where
is the permittivity of free space with value 
substituting values


Generally the electric force keeping the dust particle on the air equal to the force of gravity acting on the particles

=> 
=> 
=> 
=> 
Answer:
a. when the acceleration of the objects become negative
I know for a fact the answer is D. the distance traveled by the wave during one full cycle
In the form of an ion, Al 3+, It will lose 3 electrons