Car A and Car B approach each other on the same road. Car A is driving 35.0 m/s, while Car B is driving 15.0 m/s. When Car A honks its horn, Car B hears a frequency of 1140 Hz. What is the frequency of Car A's horn when stationary? (Hint: 1140 Hz is the Doppler-shifted frequency.). (Speed of sound = 343 m/s) (Unit = Hz)

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal. find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.