useless trivia: What Word Means: A Fold Or Flap?

Questions

how many feet is it from the service line to the net in tennis?

in the early sixties who had 5 top 10 hits in a row, one of which was 'take good care of my baby'?

where is the arch of titus?

what was the first full length colour cartoon talking picture?

what is the common name for the fruit 'citrus grandis'?