You are standing on a street corner and you hear an ambulance siren. the pitch of the siren seems to be getting higher. what do you expect will happen next? a. the pitch of the siren will change unpredictably as it approaches you. b. the siren will get louder and higher as the ambulance moves towards you. c. the siren will eventually fade as the ambulance moves away from you. d. the pitch of the siren will continue to get higher, but you will not see the ambulance because it is moving away.

When a pair of 10-n forces act on a box of candy, the net force on the box is a 20 n. b about 14 n. c zero. d any of the above depending on the directions of forces.

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.

Aseries circuit contains a 30 e resistor, a 20 resistor, and a 10 resistor. the power supply provides 100 v to the circuit the current in the 10 resistor, to two significant figures, is a.