An opera singer in a convertible sings a note at 700 Hz while cruising down the highway at 90 km/h . The speed of sound in the air is 343 m/s. 1. What is the frequency heard by a person standing beside the road in front of the car?
2. What is the frequency heard by a person standing beside the road behind the car?

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse

Along the line connecting the two charges, at what distance from the charge q1 is the total electric field from the two charges zero? express your answer in terms of some or all of the variables s, q1, q2 and k =14ï€ïµ0. if your answer is difficult to enter, consider simplifying it, as it can be made relatively simple with some work.

Which best describes the weak nuclear force? it maintains attraction between the m ecules in liquids. it attracts the nucleus of one atom to the nucleus of another atom. it pulls all matter in the universe together it keeps particles that make up protons and neutrons together