Final answer:
The statement about bubble sort is False; elements can be swapped multiple times until the list is sorted. The reference question about frequency becoming infinite when moving at the speed of sound is True.
Step-by-step explanation:
The statement "Once the bubble sort places a value in the sorted list, that value will never move again in the remainder of the passes." is actually False. In the bubble sort algorithm, during each pass, adjacent elements are compared and swapped if they are in the wrong order. This process is repeated until the entire list is sorted. However, it is not true that a value will never move again once it has been placed in its sorted position; a value can potentially move again if subsequent elements cause a swap. In the context of the given reference question, "True or false-The observed frequency becomes infinite when the source is moving at the speed of sound.", the answer is True. When a source moves at the speed of sound, the waves it emits are compressed into a single point at the leading edge, effectively increasing the frequency to a very high value, approaching infinity.