Anoiseless 4-khz channel is sampled every 1 msec. what is the maximum data rate? how does the maximum data rate change if the channel is noisy, with a signal-to-noise ratio of 30db? ( analyze based on nyquist theorem and shannon theorem. note that, the s/n in shannon equation is just a ratio, not in the unit of db?

1. technician a says horsepower information can be used by consumers to compare the power of different automobile engines. technician b says that manufacturers will often list the horsepower output of their engines in the online service information. who is right?

Which of the following examples has four beats in each measure?

1. which of the following is a search engine? a) mozilla firefox b)internet explorer c)google d)safari 2. which of the following statements is true? a) all search engines will provide the same results when you enter the same query. b) all search engines use the same amount of advertisements. c) some search engines are also browsers. d) search engines often provide different results, even when you enter the same query.