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Steady-state creep rate data are given below for nickel at Steady-state creep rate data are given below for nickel at 1000(C (1273 K): If it is known that the activation energy for creep is 272,000 J/mol, compute the steady-state creep rate at a temperature of 850(C (1123 K) and a stress level of 25MPa(3625psi). Is […]

A PAM telemetry system involves the multiplexing of four input A PAM telemetry system involves the multiplexing of four input signals: si (t), i = 1, 2 3, 4. Two of the signals s1 (t) and s2 (t) have bandwidths of 80 Hz each, whereas the remaining two signals s3 (t) and s4 (t) have […]

Some of our modern kitchen cookware is made of ceramic Some of our modern kitchen cookware is made of ceramic materials. (a) List at least three important characteristics required of a material to be used for this application. (b) Make a comparison of three ceramic materials as to their relative properties and, in addition, to […]

Some metal alloy is known to have electrical conductivity and Some metal alloy is known to have electrical conductivity and electron mobility values of 1.5 x 107 (ohm-m)-1 and 0.0020 m2/V-s, respectively. Through a specimen of this alloy that is 35 mm thick is passed a current of 45 A. What magnetic field would need […]

A radio link uses a pair of 2m dish antennas A radio link uses a pair of 2m dish antennas with an efficiency of 60 percent each, as transmitting and receiving antennas. Other specifications of the link are: Transmitted power = 1dBw Carrier frequency = 4 GHz Distance of the receiver from the transmitter = […]

Consider a rectangular pulse defined by, it is proposed to Consider a rectangular pulse defined by, it is proposed to approximate the marched filter for g (t) by an ideal low-pass filter of bandwidth B; maximization of the peak pulse signal-to-noise ratio is the primary objective. (a) Determine the optimum value of B for which […]

Consider a random process X (t) expanded in the form N, where Consider a random process X (t) expanded in the form N, where W’ (t) is a remainder noise ter Consider a rate-1/2, constraint length-7 convolutional code with free distance d free = 10. Calculate the asymptotic coding gain for the following two channels […]

Consider a random process X (t) expanded in the form N, where Consider a random process X (t) expanded in the form N, where W’ (t) is a remainder noise term Consider a rate-1/2, constraint length-7 convolutional code with free distance d free = 10. Calculate the asymptotic coding gain for the following two channels […]

Consider a random process X (t) expanded in the form N, where Consider a random process X (t) expanded in the form N, where W’ (t) is a remainder noise term. The {Fi (t)} Ni = 1 form an orthonormal set over interval 0 = t = T, and the Xj are defined by. Let […]

Consider a random binary wave x (t) in which the The scheme shown in Figure may be viewed as a differential encoder (consisting of the modulo-2 adder and the 1-unit delay element) connected in cascade with a spec form of correlative coder consisting of the 1-unit delay element and summer). A single delay element is […]