In a laboratory, a tuning fork of unknown frequency is sounded together with a standard fork of 256Hz. The observer counts exactly 25 loud maxima in 10s.
(i) Find the magnitude of the difference between the frequencies of the two forks.
(ii) If the first sound heard at t=0 is a minimum, calculate how many maxima will be heard up to t=10s.
(iii) Determine the time after t=0 at which the third minimum will be heard.