The design of a classical power supply using diodes: using the diode exponential model, determine the value of the resistance r such that the output voltage vo equals 3 v when il is 0. when a voltage of 0.7 v is applied across a diode, a current of 1 ma results through the diode. assume vt = 25 mv.

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?

Figure out the odd statement about ceramics in the following (a) good insulators of heat and electricity (b) usually less desire than metals (c) ductile in nature (d) contains both metallic and nonmetallic elements