Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A thin-walled tube of 20-mm diameter passes hot fluid at a mean temperature of 45°C in an experimental flow loop. The tube is mounted horizontally in quiescent air at a temperature of 15°C. To satisfy the stringent temperature control requirements of the experiment, it was decided to wind thin electrical heating tape on the outer surface of the tube to prevent heat loss from the hot fluid to the ambient air.
(a) Neglecting radiation heat loss, calculate the heat flux q; that must be supplied by the electrical tape to ensure a uniform fluid temperature.
(b) Assuming the emissivity of the tape is 0.95 and the surroundings are also at 15°C, calculate the required heat flux.
(c) The heat loss may be reduced by wrapping the heating tape in a layer of insulation. For 85% magnesia insulation (k = 0.050 W/m · K) having a surface emissivity of 8 = 0.60, compute and plot the required heat flux q; as a function of insulation thickness in the range from 0 to 20 mm. For this range, compute and plot the convection and radiation heat rates per unit tube length as a function of insulation thickness.
consider a 3λ/4 linear wire antenna which is fed at the center,find : i- the current distribution on the wire. ii- for the input current of .7 Amp, find the loop current (I0) , and the maximum radiated E at r = 1000 m
calculate the resistor's resistance. If the bandwidth were cut to 25 kHz, determine the expected output meter reading.
In general, what observations can be made about a physical system that has pole and zero locations that are not eitehr real-valued or complex conjugate pairs
Find Rin, Avo, and Ro. Also, if a load resistance of 10k ohm is connected to the output, what overall voltage gain Gv is realized. Now, if a 0.2 V peak sine wave signal is required at the output, what must the peak amplitude of Vsig be.
If a given modulation method A requires higher Eb/No ratio for a given probability of error compared with another modulation method B, is method B better than method A or not, and why
a sequential circuit has one input (X) and one output (F). The circuit examines groups of four consecutive inputs and produces an output F=1 if the input sequence 0101 or 1001 occurs. The circuit resets after every four inputs.
A pn-junction is formed in silicon by doping one side with acceptor atoms at concentration Na = 10^19 cm^(-3) and another side with donor atoms at Nd = 10^18 cm^(-3). A. What is the dopant concentration on the p-type side and on the n-type side
Suppose that data are stored on a 1.4-Mbyte floppy diskettes that weight 30 g each. Suppose that an airliner carries 10,000 kg of those floppies at a speed of 1000 km/h over a distance of 5000 km. What is the data transmission rate in bits per sec..
500W lighting is connected in parallel with an inductive load. A clamp-on ammeter reveals a total circuit current of 7A. What is the inductance of the load connected in parallel with incandesent lights. Assume a voltage of 120v and 60hz.
a certain cross section lies in the x-y plane. if 3x1020 electrons go through the cross section in the z-direction in
A 10 uH inductor is connected to a circuit such that prior to t = 0 the current through the inductor is 10 mA. After t = 0 the current through the inductor is iL(t) = 10e^(-1000t) mA where t is time in seconds. a) Determine the expression for indu..
Draw the per-phase impedance diagram of the power system and Draw the impedance diagram in per-unit system
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd