Describe the process of preemphasis. How does it improve communication performance in the presence

of noise? Where is it performed, at the transmitter or receiver?

Compare a wireless radio system with a fiber-optic communication system for digital data communications over a distance of I km. Assume a desired data rate of 75 Mbps. Give pros and cons. advantages and disadvantages. of each. Which one would be better. all factors being considered?

The atmosphere of Jupiter is essentially made up of hydrogen, H2. For H2. the

specific gas constant is 4157 J/(kg)(K). The acceleration of gravity of Jupiter is

24.9 m/s 2• Assuming an isothermal atmosphere with a temperature of 150 K and

assuming that Jupiter has a definable surface, calculate the altitude above that

surface where the pressure is one-half the surface pressure.

During the recovery of a cold-worked material, which of the following statement(s) is (are) true?

Between a push cart and a pull cart, which requires the greater “effort”? For consistency, both weighs 500 N, has a handle bar inclined 30° above the horizontal and a coefficient of sliding friction with the ground surface of 0.30. Consider the “effort” as either the pushing or pulling force applied along the handle of the cart. Support your claim with an explanation and computations.