What is the 4th state of matter and it’s properties?

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

The field between two charged parallel plates is kept constant. if the two plates are brought closer together, the potential difference between the two plates either a) decrease b) does not change c) increase?

Apropagating wave in space with electric and magnetic components. these components oscillate at right angles to each other. it may travel in a vacuum. determine the term.