問題詳情
47. A tuning fork is known to vibrate with frequency 262 Hz. When it is sounded along with amandolin string, four beats are heard every second. Next, a bit of tape is put onto each tine of thetuning fork, and the tuning fork now produces five beats per second with the same mandolin string.What is the frequency of the string?
(A) 257 Hz
(B) 258 Hz
(C) 262 Hz
(D) 266 Hz
(E) 268 Hz
參考答案
答案：D
難度：計算中-1
書單：沒有書單，新增