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A long rod of 60-mm diameter and thermo physical properties P = 8000 kg/m3, c = 500 J/kg · K, and k = 50 W/m · K is initially at a uniform temperature and is heated in a forced convection furnace maintained at 750 K. The convection coefficient is estimated to be 1000 W/m2 · K.
(a) What is the centerline temperature of the rod when the surface temperature is 550 K?
(b) In a heat -treating process, the centerline temperature of the rod must be increased from Tj = 300 K to T = 500 K. Compute and plot the centerline temperature histories for h = 100, 500 and 1000 W/m2 · K. In each case the calculation may be terminated when T = 500 K.
Porter's Five Competitive Forces
Using the basic counter design / state machine develop a design that allow the user to push a button to act as a clock for the input to a counter. The output shall be displayed using either the discrete LEDs or the 7-segment as in the previous Lab..
An object of mass m = 0:1 kg is dropped from a high tower. Suppose the magnitude of the force due to air resistance is 0:98v2. (The gravitational constant is g = 9:8 m s2 ). a) Write down the dierential equation satisfied by velocity.
A 230V shunt motor having an armature resistance of 0.05 W and a field resistance of 75 W draws a line current of 7 A while running light at 1120 rev/min. The line current at a given load is 46 A.
show that the resistivity of intrinsic Ge at 300k is 44.44 ohm-cm. If donor impurity is added to an extent of 1 atom per 10^8 Ge atoms, prove that the resistivity of the Ge sample drops to 4.42 ohm-cm (at 300k).
A peak power tracker having 5 identical 0.2 m2 PV modules is used to built a PV charger is built from a with an efficiency of 80%. The test ratings of the modules are imp,ref = 2 A, Vmp,ref = 20 V , Tc,NOCT = 42 oC, μP,mp -0.0005 /oC , τα = 0.9.
assuming you have an analog amps system that has 84 channels operating at 30 khz using a 71 reuse pattern and its
Some of the particles comprising atoms react to each other in a way that scientists categorize as electric charge. There are two fundamental types of electric charge: positive and negative.
1.) Differentiate EN with respect to r, and then set the resulting expression equal to zero, because the curve of EN versus r is a minimum at E0. 2.) Solve for r in terms of A, B, and n, which yields r0, the equilibrium interionic spacing.
Find the broadcast throughput of the network.
he real power delivered by a source to two impedances, Z1=3+j4 ohm and Z2=10 ohm, connected in parallel, is 1100 W. Determine (a) the real power absorbed by each of the impedances and (b) the source current.
a 220v shunt motor driving its normal load draws an armature current of 50A. The armature resistance is 0.25ohm. determine the armature current it will draw when connected to 200V source while maintaining the armature speed and the flux per pole.
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