The doppler effect explains (3 points) why the sound in front of a moving car has a higher pitch than behind it why the sound in front of a moving car cannot be heard why the sound in back of a moving car cannot be heard why the sound in front and in back of a moving car is louder than at the sides

the culture of asia encompasses the collective and diverse customs and traditions of art, architecture, music, literature, lifestyle, philosophy, politics and religion that have been practiced and maintained by the numerous ethnic groups of the continent of asia since prehistory. identification of a specific culture of asia or universal elements among the colossal diversity that has emanated from multiple cultural spheres and three of the four ancient river valley civilizations is complicated. however, the continent is commonly divided into six geographic sub-regions, that are characterized by perceivable commonalities, like religion, language and relative ethnic homogeneity. these regions are central asia, east asia, north asia, south asia, southeast asia and west asia

it teaches readers about an interesting chinese custom and causes them to determine that the minister is trying to be polite