Awave has a wavelength of 4.9 m and a velocity of 9.2 m/s. the medium through which this wave is traveling is then heated to a greater temperature. what must be true about the frequency of this wave?
a. the frequency is less than 1.9 hz.
b. the frequency is greater than 1.9 hz.
c. the frequency is equal to 1.9 hz.
d. there is not enough information to determine the frequency of this wav

Option (b) The frequency is greater than 1.9 Hz.

Explanation:

Given that,

Wavelength of the wave,

Velocity of the wave, v = 9.2 m/s

Let f is the frequency of the wave. Frequency is given in terms of wavelength and speed as :

f = 1.877 Hz

or

f = 1.9 Hz

It is mentioned that the medium through which this wave is traveling is then heated to a greater temperature. Due to increase in temperature some of the energy is given out to the medium. Hence, the frequency must be greater than 1.9 Hz.

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.