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It is observed that a straightened paper clip can be twisted through several revolutions by the application of a torque of approximately 60 N.m. Knowing that the diameter of the wire in the paper clip is 0.9 mm, determine the approximate value of the yield stress of the steel.
Although sums behave like integrals, because of the discrete nature of the sums one needs to be careful with the upper and lower limits more than in the integral. To illustrate this, consider the separation of an integral into two integrals.
A mild structural steel beam has a solid squre cross section of 100mm and is simply supported by two supports 3mm apart. Calculate the dead load that can be safely supported when applied to the middle of the beam.
Assume the temperature is 300K and mobilities are u_n = 1300 cm^2/Vs and u_p = 450 cm^2/Vs. a. What are the majority and minority carrier concentrations b. What is the resistivity of the sample c. What is the resistance (end-to-end) of the sample
Discuss why the primary of a power transformer would have excessive current if the secondary were short-circuited. Why would there be no voltage across the secondary if the primary is open
Design a bus with 3 bits in the address of the source, 4 bits in the address of the destination and 2 bits of data to be transmitted. Use gates only. Hint: good solution should be based on 2-dimensional decoding.
Synchronous Satellite Link: Consider a 2 GHz link between asynchronous satellite and a ground station on the equator. The bandwidth of the up-link and down-link are the same. The orbital radius of the satellite is 36,000 Km and the radius of the E..
A coil made of 150 turns of copper wire wounded ona cylindrical coil . If that means radius of the turns in 6.5mm and the diameter of the wire is 0.4mm, calculate the resistance of the coil.
Find also (c) the bandwidth, (d) the lower and upper half-power frequencies and (e) the value of the circuit impedance at the half-power frequencies.
A 240/40 volt transformer supplies two different secondary loads. One load (a) draws a current of 12 amperes at a lagging power factor of 0.94. The other load (b) draws a current of 12 amperes at a leading power factor of 0.94.
A Y-connected three phase supply has a balanced voltages of 110e^j0, 110e^(j2/3) and , 110e^(j4/3). The corresponding impedances on the Y-connected load are 30, 30+j40 and 40+j30 ohm.
When carrying out an FFT of a cosine wave whose frequency is 0.1Hz and whose amplitude is unity , explain why the peak amplitude measurement obtained in the range 0.09Hz to 0.11Hz should be 0.5
(a) Find the maxterm expression for F. Express your answer both in decimal and algebraic form. (b) Use a Karnaugh map to find the minimum sum-of-products form for F'. (c) Find the minimum product-of-sums for F.
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