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Current and charge in a battery. Consider a car battery rated at 100 A· h. This battery can supply a current of 100 A for an hour.
(a) How much charge can the battery supply?
(b) What must be the area of a parallel plate capacitor, with plates separated a distance d = 0.01 mm and relative permittivity of 4 for the dielectric between the plates to supply the same charge as the battery in (a)?
Produce a hypothetical set of performance specifications for such a signaling device.
How long must the tube be made if the outlet oil temperature is 60 C? The Nusselt number for oil side is 5.56. F. water side.
If a double-effect evaporator system is used with forward feed and U = 450 Btu/h-ft2-°F and 112 = 350 Btu/h-ft2-°F, and a vapor- space pressure of 4 in. Hg in the second effect determine the heat- transfer area of each effect, assuming equal areas..
Use molecular orbital theory to predict whether the bond order in the superoxide ion, O2-, should be higher or lower than the bond order in neutral O2 molecule.Is the bond order of O2- higer or lower than that of O2?
A stylized 108 saccade is shown in the following figure. Estimate z and n for the Westheimer model described in Section 12.4. Calculate the time to peak velocity and peak velocity
A large CSTR, small CSTR and PFR of fixed volume are available. In general, how wouldyou arrange them for getting maximum conversion forreactions of order >1 and1 arrangement is PFR followed by small CSTR followed by large CSTR tomaintain the reac..
The volume of each stirred tank is 40,000 liters. In passingthrough this system, by how much has the activity decayed? The reaction follows first order kinetics with a constant density
what is the composition of the system at equilibrium? What would be the effect of reducing the pressure to 1 bar? Assume ideal gases.
A 2300-V, three-phase, wye-connected, round rotor synchronous motor has a synchronous reactance of 3 Ω per phase and an armature resistance of 0.25 Ω per phase. The motor operates on load with a power angle of -15°, and the excitation is adjusted ..
Calculate the explicit solution of the kinetic differential equation of the reaction 2X(l)X(2) and show that they have all the properties mentioned above. (Think about the impracticality of carrying through the same procedure for a reaction with, ..
The specific heat of the feed solution is 3.77 J/g_OC, and the latent heat of vaporization of the solution may be taken equal to that of water. Radiation losses may be neglected.
Find the efficiency of the transformer when it is delivering 7.5 kVA at 230 V and 0.85 power factor lagging.
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