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)

Agroup of monkeys is trying to cross the river in a rowboat. the maximum buoyant force on the rowboat is 2,000 n. the weight of the rowboat is 1,000 n. each monkey has a weight of 150 n. how many monkeys can safely cross in the rowboat at one time? explain your reasoning, including any calculations you used to find the answer.