Electrons are fired at a rectangular potential energy barrier, once every 293 ms.293 ms. If the barrier is 2.55 nm2.55 nm thick and has a height that exceeds the energy of the incident electrons by exactly 662 meV,662 meV, how long on average would you expect to wait for one electron to pass through the barrier?

spare some change and give it to the poor

explanation:

plz : ((

i don't understand. explain it clearly

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.