I'LL MARK YOU BRAINLIEST IF YOU ANSWER THIS CORRECTLY

The speed of sound in air at 20 deg C. is approximately 340 m/s

True
False
Wave speed = wave frequency x wave length

True
False

Because f=1/period, wave speed = wavelength/period

True
False

What is the wavelength of a sound wave that has a speed of 340m/s and a frequency of 440 hz

0.773 m

149,600 m

1.29 m

What is the wave speed of a wave that has a frequency of 50 Hz and a wavelength of 2.0 m?

25 m/s

100 m/s

0.04 m/s

Fft review: linspace, fs, fftshift, nfft 1. generate one second of a cosine of w,-10hz sampled at f, = 100hz and assign it to x. define a tt as your time axis 2. take 64 points fft. 3. as you remember, the dft (which the fft implements) computes n samples of s2t where k-0,1,2, n -1. plot the magnitude of this 64-points fft at range 0 to 63, what do you think of this graph? 4â·to get the x-axis into a hz-frequency form, plot this 64-points fft between-50 to 50 (the 100hz sampling rate) and have n-points between them. 5. according to your figure, what frequency is this cosine wave at? 6. remember that the fft is evaluating from 0 to 2ď€. we are used to viewing graphs from-ď€ to ď€. therefore, you need to shift your graph. 7. now according to your shifted graph. what frequency is this at? 8. note that the spikes have long drop-offs? try a 1024-point dft. note that the peak is closer to 10 and the drop-off is quicker. although, now sidelobes are an issue

For which pair of objects would adding the same a

True or false graphs must include scales that increase by the same amount