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Capacitance of small plates. Two square plates are used as a variable capacitor by rotating one plate about the axis A-A while the other plate is fixed. In the two extremes, the plates are either parallel to each other or flat on a plane as shown in Figures 6.46a and 6.46b. The plates are 50 mm by 20 mm in size. When parallel to each other, they are 2 mm apart, as shown in Figure 6.46b. When on a plane, they are separated 2 mm while the edges remain parallel. Calculate the range of the capacitor capacitance.
(a) In a throttling process, energy and exergy are conserved. (b) If unit costs are based on exergy, we expect the unit cost of the electricity generated by a turbine to be greater than the unit cost of the high-pressure steam provided to the turb..
A 24 in long bar with a cross sectional area of 1.0 in^2 is subjected to an axial tensile load of 10,000 lb. compute the stress, strain and the total elongation if the bar material is :
the collar a is free to slide along the smooth shaft b mounted in the frame. the plane of the frame is vertical.
a 300-foot-long 6-ft-wide parabolic trough concentrator receives normal solar radiation at 905 wm2. a pipe at the focal
a gate is 0.5 m wide and 0.6 m tall and is hinged at the bottom. on one side the gate holds back a 0.5 m deep body of
Determine the number of independent slip systems for crystals with each of the following combinations of slip systems. (The simplest way to do this is to de- termine how many of the strains ε1, ε2, γ 23, γ 31, and γ 12 can be independently imposed ..
Consider an air cooler where the flow rate of liquid is large compared to the air, and the effectiveness, e, of the cooler is known to depend on the flow rate of air according to the relation, e ~ mair^-0.3 . The air inlet temperature is 25oC and the..
an ideal vapor compression refrigeration cycle that uses r-134a maintains a pressure in the condenser of 1000kpa and
an open feedwater hearter operating at steady state accepts superheated steam at 500kpa and 200degc and mixes the
by treating it as an undamped single-degree-of-freedom system. Use the numerical procedure described in Section 4.3.
Determine a Fourier series representation of the periodic voltage e(t) shown in Figure 7.14.
A paddleboard is 12 ft long, 18 inches wide, 4.0 inches thick, and weighs 15 pounds. If the surfer weighs 170 pounds, how deep, in inches, does the board sit in fresh water?
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