Suppose we want to sample a finite-duration signal x(0) that occupies 0sist (a) devise a way to use the dft to select a suitable sampling rate fs for signal x(t). hint: consider the characteristics of an oversampled signal's dft spectrum.] (b) test the method you devised in part (a) using the signal x() a). use matlab to compute any needed dfts. what value f, seems reasonable for this signal?

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

The charge on an electron is 1.60218 × 10−19 c and its mass is 9.10939 × 10−31 kg. how strong a magnetic field must be experienced by the electron if its path is a circle of radius 5.5 cm? answer in units of t.

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?