Find the inverse Laplace transform of
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For the motor in Problem 7.1 and for a fan-type load, calculate the following, assuming that the supply frequency is reduced by 20%:
a. Motor speed b. Starting torque c. Starting current d. Motor efficiency (ignore rotational and core losses)
An ideal gas initially at 300 K and 1 bar undergoes a three-step mechanically reversible cycle in a closed system. In step 12, pressure increases isothermally to 5 bar; in step 23, pressure increases at constant volume; and in step 31, the gas returns adiabatically to its initial state. Take CP = (7/2)R and CV = (5/2)R.
(a) Sketch the cycle on a PV diagram. (b) Determine (where unknown) V, T, and P for states 1, 2, and 3. (c) Calculate Q, W, ?U, and ?H for each step of the cycle.
Technician A says that when a kingpin is welded to an upper coupler, it should be stitch welded in one direction of rotation. Technician B says that an AWS E-11018 electrode is recommended. Who is correct?
A. Technician A only B. Technician B only C. Both A and B D. Neither A nor B
Describe extension lines.
What will be an ideal response?