1. On the Smith chart, movements along a transmission line are plotted as a function of the wavelength. The wavelength can be related to the frequency if the physical characteristics of the transmission line are known; in the case of the coaxial cable, for example, knowledge of the dielectric constant will allow us to relate frequency to wavelength. Assume a coaxial cable of relative dielectric constant & = 2.25. Given a 30 cm cable, determine the length of the cable in terms of wavelengths for the following frequencies. (1 pts) a. 100 MHz (for example Ans: length 30 cm = 0.15* 2 = 0.3 * 1/2) b. 333.33 MHz c. 600 MHz d. 1000 MHZ Electrical length (EL) Frequency 100 MHz 333.33 MHz 600 MHz 1000 MHZ Length of the cable 30 cm 30 cm 30 cm 30 cm

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

Which of the following is an easy way to remember the modified “x” tire rotation? a. nondrive wheels straight, cross the drive wheels b. drive wheels straight, cross the nondrive wheels c. drive wheels crossed, nondrive wheels straight d. drive wheels crossed, nondrive wheels crossed

The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length