When is seres six Doctor Who?

The Doppler effect says that if v0 is greater then vs then an observer will hear a higher pitch in front of source does that mean if vs is greater v0 an observer will hear a higher pitch BEHIND source? How many countries in the world ending with the letter a? What was Americas answer for the panzer and blitzkrieg? What type of clothing do American people wear? What is Cursive form of writing developed from hieroglyphs? Can horse linament be used on dogs for infections? What percent of 50 shirt is 35 shirts? Where is Shiloh located? If you do not talk to women and are rough straight forward and are confident short intelligent and handsome will they get attracted to you? Cooling fan for rad on a 2000 Pontiac grand am will not turn on? Was humpty dumpty a king? How many tablespoons of coffee for a 48 cup coffee maker? How tall is AJ Foyt? Why do insurance companies use the Mercalli scale instead of the Richter scale? Did Thomas Jefferson help write the bill of rights? What is sectionalism and how did this become one of the causes of the Civil War? What is the most fragile state of clay? What is halfway point between largo Florida and Cullman Alabama? What is an antonym for accumulate? What actors and actresses appeared in Mo deng za chai - 1982?

When is seres six Doctor Who?