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Two rolled-steel channels are to be welded back to back and used to support the loading shown. Knowing that the allowable normal stress for the steel used is 30 ksi, determine the most economical channels that can be used.
1. everyones gasoline problem. we are all familiar with fluctuating prices of gasoline at the pump. why does this
Design a series resonant circuit to have a bandwidth of 400 Hz using a coil with a Ql of 20 and a resistance of 2. Find the values of L and C and the cutoff frequencies.
A certain appliance has a potential difference of 100volts while getting a current of 1.5 amperes. Calculate the rate at which energy is changing in this appliance.
A quantum well has a finite-height barrier on one side and an infinitely high barrier on the other. Find the energies for the two lowest states for an electron in the well. The width of the well is L = 1 nm and the height of the finite step is Uo ..
A 10 GHz radio link is established between two antennas separated by 40 Km , find the necessary height of the antennas , assume equal antenna heights and standard atmospheric conditions.
Llooking at the distribution transformers failure trend it shows a high rate in wet season than in the dry seasons. what could be the likely contributing factors
A mosfet amplifier has attribute for wwhich the mid band voltage gain between gate and drain is -27V/V the nmos trensistor has Cgs=0.3 pf and Cdg=0.1 pf. What input capacitance should be
The normalized lowpass filter with a cutoff frequency of 1 rad/sec is given as Hp(s) 1/s+1 a. Use Hp(s) and the BLT to obtain an corresponding IIR digital high passs filter with a cutoff of 30 Hz, assuming a sampling rate of 200 hz,
A variant of the binary symmetric communication channel is called a binary erasure channel. The transmitter sends a ‘0' or ‘1,' but at the receiver there are three possibilities: a ‘0' or ‘1' or ‘undecided bit (called erasure)' rec..
Write down the bed form of decimal 845. Convert the denary number 818 first to hexadecimal then to binary.
Write the switching expression for the burglar alarm that produces a logic 1 (rings a bell) when the safe is moved and the control switch is closed, or when the closet is o pen after banking hours, or when the closet is opened with the control swi..
An AC motor with impedance Z = 4.2 + j3.6 Ω is supplied by a 220 V, 60 Hz source. Determine the reactive power delivered to the load.
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