Chapter 14, Problem 18QAP

Im struggling to find the moment about point D. Please explain how to set up and solve

Two loads connected in parallel consume a total of 2.4 kW with a power factor of 0.8 lagging, both supplied at 120 V, 60 Hz. Knowing that one of the loads consumes 1.5 kW at a power factor of 0.707 lagging. a. Determine a power factor of he second load b. Correct the power factor to 0,9 lagging

Determine the maximum power that a load connected between a and b could consume.

The benchmark is 00.00. The backsights are 6.00, 9.32 and 13.75 and 14.00 The foresights are 6.00, 9.00 and 3.22. What is the height of the instrument? H.I. - 100.00 - 124.85 - 43.07- 24.85

The benchmark is 100.00. The backsights are 4.00, 6.32 and 12.75. The foresights are 6.00, 9.00 and 3.22. What is the elevation of the point?    - 95.14 - 123.08 - 104.85 - 81.78

Determine the stiffness matirx of the entire truss in Global co-ordinate system, clearly indicate the degrees of freedom numbers in the stiffness matrix.

Find Vx,V1,V3,V0 according to the case of the circuits using LVK

Find nodal voltages and the unknown variables Vo, Vx, Ix, Va, Io

Determine the stiffness matrices of elements 2, 3 and 4 in the global co-ordinate system.  Assume A=0.0015m2 and E=200GPa, indicate the degrees of freedom in all stiffness matricies.