A 30 cm violin string is placed in front of a speaker, and the frequency of a sine wave generator driving the speaker is slowly swept from 500 Hz to 1500 Hz. During the time the frequency is changing, the string noticeably vibrates only twice: once at 880 Hz and once at 1320 Hz. Which resonant modes of the string are these?

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented. b)scientists had not completely finalized their results, which took 30 years. c)cigarettes were cheaply available and media channels were very inefficient. d)cigarette manufacturers were trying hard to bring an alternative into the market

Which best represents the law of conservation of mass ?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?