The frequency of a sound wave is determined by the amplitude of the wave. As amplitude of the wave is high the frequency of the wave will also be high.
Improve the bracketed part of the sentence. In the eighteenth century, Japan's feudal overlords, from the shogun to the humblest samurai, found themselves (on) financial stress.
Which one of the following climates is found in coastal areas of California in north America, Central Chile in South America and South-west tip of West Australia?