One brand of dog whistles claims a frequency of 25 khz for its product. what is the wavelength of this sound? (the speed of sound in air is 343 m/s)
0.01372 m
0.02181 m
0.01748 m
0.011654 m

Option A

0.01372 m

Explanation:

The speed of sound is a product of the wavelength and frequency hence

Speed=Wavelength * Frequency

Making wavelength the subject then

Substituting 343 m/s for speed and 25 kHz= 25000 Hz for frequency we obtain

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19