Answer:
if we ever ride a airplane we dont mess up its signals and crash ,and its easier to ignore calls and texts
Explanation:
The wedge is an adaptation of the inclined plane. It can be used to raise a heavy load over a short distance or to split a log. The ideal mechanical advantage (IMA) of a wedge depends on the angle of the thin end. The smaller the angle, the less the force required to move the wedge a given distance through, say, a log.
The answer is A I hope this helps.
Frequency can be defined as the ratio between the speed of the wave and its wavelength, that is

At the same time, the frequency is the inverse of the Period so

If we join the two expressions we will have to

Replacing we have that


Therefore the period of the wave is 