Explanation:
Since, it is given that one hand completes 3.19 vibrations in 8.46 sec. Therefore, in one second the number of vibrations will be as follows.
![\frac{3.19}{8.46}](https://tex.z-dn.net/?f=%5Cfrac%7B3.19%7D%7B8.46%7D)
= 0.377 vibrations
Hence, frequency (f) = 0.38 Hz
Now, formula to calculate the speed is as follows.
v = ![f \times \lambda](https://tex.z-dn.net/?f=f%20%5Ctimes%20%5Clambda)
or,
= ![\frac{0.6 cm/s}{0.38}](https://tex.z-dn.net/?f=%5Cfrac%7B0.6%20cm%2Fs%7D%7B0.38%7D)
= 1.57 cm
Thus, we can conclude that the wavelength is 1.57 cm.
Answer:
714s
Explanation:
t=H/v=500000m/700m/s=714s
Answer:
28.5 m/s
Explanation:
The speed has two orthogonal components, horizontal and vertical. To decompose the speed into these components we can use these trigonometric equations:
Vh = V * cos(a)
Vv = V * sin(a)
The forwards velocity is the horizontal component, so we use
Vh = V * cos(a)
Vh = 50 * cos(55)
Vh = 50 * 0.57
Vh = 28.5 m/s