What is the definition of mechanical energy

This punnett square shows the cross between two pants. one parent has round seeds (rr). and the other parent has wrinkled seeds (rr) which best describes their offspring as shown in this cross?

An electron is traveling with initial kinetic energy k in a uniform electric field. the electron comes to rest momentarily after traveling a distance d. (a) what is the magnitude of the electric field

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in