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

How does district of columbia v heller relate to federalism

Some european explorers sailed west looking for the passage to india

How has the elimination of trade barriers affected the movement of goods among member countries of the european union? a. member countries are able to produce all the goods they need. b. goods can move freely among member countries. c. member countries no longer need to trade with countries outside the eu. d. larger countries are able to import more goods than smaller ones.