Answer:
질문?
Explanation:
평균 공기 밀도가 1.25kg/m³이고 수은 밀도가 13600kg/m³이고 g=10N/kg인 경우 산 기슭의 기압은 수은의 75.0cm이고 정상의 수은은 60cm입니다. 산의 높이를 계산?
To solve this problem we will use the concepts related to the speed of a string which is given by the applied voltage and the linear mass density of it. With the speed value we can find the fundamental frequency that will serve as a step to find the maximum speed through the relation of Amplitude and Angular Speed. So:

Where,
T = Tension
= Linear mass density


With this value the fundamental frequency would be



Finally the maximum speed is given with the relation between the Amplitude (A) and the Angular frequency, then




Therefore the correct answer is B.
Answer:

Explanation:
The number of oscillation per unit time is called frequency of a wave while the distance between two consecutive crests and the trough is called its wavelength.
The wavelength of a wave is given by :

If frequency is doubled, f' = 2f




So, when the frequency is doubled the wavelength of a wave on the string becomes half.