Awave travels at speed 4.0 m/s. its wavelength is 22 cm. what is the frequency of the wave? a) 28 s^-1 b) 11 s^-1 c) 18 s^-1 d) 23 s^-1

Given data:

     wave length (λ) = 22 cm = 0.22 m,

     speed of wave length(v) = 4 m/s ,  

determine the frequency (f)  = ?

 We know that ,

          wave length and frequency of light are closely related. The higher the frequency, shorter is the wavelength and vice-versa.

          Mathematically, λ = v/f             (i)

                where,  λ = wave length (m)

                             v = speed of wave length (m/s)

                              f = frequency (Hz)

                From the equation (i) ,

                                    frequency (f) = v/λ

                                                           = 4 / 0.22

                                                          = 18.18 /second

frequency (f) of the wave is 18 /sec  or (18 Hz)

Note: frequency is defined as "number of occurrences per unit time", measured in Hz.

c)

Explanation:

The information we have is:

Speed:

wavelength: we need to convert this quantity to meters:

, so

------------------------------------------------

We need to find the frequency of the wave, for that we use the formula:

where is the frequency.

In tha last equation we clear for

and we substitute the known values:

the answer is c)

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..