The siren is moving away from the listener with a speed of 43m/s, and the listener moves toward the siren with a speed of 9m/s. What frequency does the listener hear if the siren admits a sound with 333hz. Speed of sound is 344 m/s

Answer///(d) atoms contain small,negatively charged particles;

The answer is d, you can easily test a theory! hope i you : )

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.