Aparticle moving in one dimension is described, at some instant in time, by the wavefunction where f(z) is a real-valued function of and k is a constant a) what is the physical interpretation of the quaatity where a and b are constants? mar b) explain the meaning of the term "expectation value". what is the physical inter- pretation of each of the following quantities: and marks c) show that the quantity b is independent of the function x) if f(oo) 0 and determine its value in terms of nark d) sketch the real part of ψ(z) if /(z) = exp(-x2/r2) where r is a constant and 1 . indicate those features of your sketch that depend on k and r. kr mar e) without calculation, briefly explain what happens to this wavefunction as time advances, 3 marka)

Is a  vector quantity  that refers to "the rate at which an object changes its position." imagine a person moving rapidly - one step forward and one step back - always returning to the original starting position. while this might result in a frenzy of activity, it would result in a zero velocity. because the person always returns to the original position, the motion would never result in a change in position. since velocity is defined as the rate at which the position changes, this motion results in zero velocity. if a person in motion wishes to maximize their velocity, then that person must make every effort to maximize the amount that they are displaced from their original position. every step must go into moving that person further from where he or she started. for certain, the person should never change directions and begin to return to the starting position.

The car would move to the right with 150 n of force. the 150 n of force from friction and air resistance slows the car from moving to the right with 300 n of force.

Ibelieve the answer is d. macula  hope my answer has you : )