If we want to get the amplitude spectrum of a 1 second signal sampled with Fs = 1000 Hz using the FFT (Fast Fourier Transform) algorithm with the condition that the minimum frequency resolution Δf is...

If we want to get the amplitude spectrum of a 1 second signal sampled with Fs = 1000 Hz using the FFT (Fast Fourier Transform) algorithm with the condition that the minimum frequency resolution Δf is 1Hz, how much additional zero sequence (Zero - padding) must be given?