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? the frequency is less than 1.9 hz. the frequency is greater than 1.9 hz. the frequency is equal to 1.9 hz. there is not enough information to determine the frequency of this wave.

The frequency is equal to 1.9 Hz.

Velocity v, frequency f and wavelength λ are related as,

calculate the frequency f of the wave.

Speed of sound  in a medium increases with increase in the temperature of the medium.  Frequency is the number of waves passing through the medium in one second. The frequency of a wave is a characteristic of a source which generates the wave. hence, it is a characteristic of the source.

If the speed of sound  changes, the wavelength changes accordingly, so as to keep the frequency constant. When the speed increases, the wavelength also increases so that the frequency remains constant.

If, on the other hand, we assume that the frequency increases when the speed increases, more waves need to pass through a point, which would mean that the source should generate more number of waves. The source generates waves with regard to its parameters and settings and it is independent of the external conditions.

Thus the frequency remains at 1.9 Hz, while the wavelength increases if the temperature of the medium increases.

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6