Given a signal sampled at 500 samples/sec for 2 seconds (i. e. 1000 samples), what is the frequency resolution (in Hz) of the Discrete Fourier Transform (DFT) of this signal?

Aplane flies directly between two cities, a and b, which are separated by . from a to b, the plane flies into a headwind. on the return trip from b to a, the wind velocity is unchanged. the trip from b to a takes less than the trip from a to b. what is the airspeed of the plane, assuming it is the same in both directions

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.