This creates a linear pitch space in which octaves have size 12, semitones (the distance between adjacent keys on the piano keyboard) have size 1, and A440 is assigned the number 69. (See Frequencies of notes.) Distance in this space corresponds to musical intervals as understood by musicians. An equal-tempered semitone is subdivided into 100 cents. The system is flexible enough to include "microtones" not found on standard piano keyboards. For example, the pitch halfway between C (60) and C♯ (61) can be labeled 60.5.
An equal-tempered semitone is subdivided into how many cents?
100

During April, Fourteenth Army advanced 300 miles (480 km) south towards Rangoon, the capital and principal port of Burma, but was delayed by Japanese rearguards 40 miles (64 km) north of Rangoon at the end of the month. Slim feared that the Japanese would defend Rangoon house-to-house during the monsoon, placing his army in a disastrous supply situation, and in March he had asked that a plan to capture Rangoon by an amphibious force, Operation Dracula, which had been abandoned earlier, be reinstated. Dracula was launched on 1 May, but Rangoon was found to have been abandoned. The troops which occupied Rangoon linked up with Fourteenth Army five days later, securing the Allies' lines of communication.
What month was a delay caused by Japanese rearguards north of Rangoon?
April

Some of Chopin's well-known pieces have acquired descriptive titles, such as the Revolutionary Étude (Op. 10, No. 12), and the Minute Waltz (Op. 64, No. 1). However, with the exception of his Funeral March, the composer never named an instrumental work beyond genre and number, leaving all potential extramusical associations to the listener; the names by which many of his pieces are known were invented by others. There is no evidence to suggest that the Revolutionary Étude was written with the failed Polish uprising against Russia in mind; it merely appeared at that time. The Funeral March, the third movement of his Sonata No. 2 (Op. 35), the one case where he did give a title, was written before the rest of the sonata, but no specific event or death is known to have inspired it.
What is another title Op. 10, No. 12 has garnered?
the Revolutionary Étude