Please help me. Im not good at physics​

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?

If anyonee has done the momentum lab practical in physics can you give me the answers i am s lostt rnn : (

An ascending elevator, hanging from a cable, is coming to a stop. part a part complete identify all forces acting on the elevator from the list below. select all that apply. select all that apply. kinetic friction normal force tension weight static friction submitprevious answers correct part b draw a free-body diagram of the object. draw the vectors starting at the black dot. the location and orientation of the vectors will be graded. the exact length of your vectors will not be graded but the relative length of one to the other will be graded.