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The radius of a gold nucleus (Z = 79) is about 7-0 x 10-15 m. Assume that the positive charge is distributed uniformly throughout the nuclear volume. Find the strength of the electric field at
(a) the surface of the nucleus and
(b) at the middle point of a radius. Remembering that gold is a conductor, is it justified to assume that the positive charge is uniformly distributed over the entire volume of the nucleus and does not come to the outer surface ?
The temperature is 25 °C, the pressure 1 bar, and the relative humidity 85%. Determine whether the formation of the decahydrate according to the reaction below, Na2 SO4 + 10H2 O = Na2 SO4 · 10H2O, can take place under these conditions. What is ..
What current flows through an ideal capacitor if the voltage across the capacitor is constant with time? To what circuit element is an ideal capacitor equivalent in circuits for which the currents and voltages are constant with time?
A firm leases land from you for 15 years to build a warehouse. As payment you will own the building after 15 years estimated to be worth $400k however you must pay taxes and maintenance of $15k per year.
A pair of synchronous machines, on the same shaft, may be used to generate power at 60 Hz from the given source of power at 50 Hz. Determine the minimum number of poles that the individual machines
a) Draw the state diagram b) Draw the schematic for the logic to implement this circuit using Inverters, AND gates, OR gates and D flip flops. Use the reverse side and additional sheets if needed.
An Opamp has a low frequency gain of 10^5 and a high frequency response with a single pole at 100 rad/s and a pair of poles at10,000 rad/s. (a) At what frequency does the total phase shift reach 180 degrees.
A series RLC circuit is connected to a voltage source x(t). The output y(t) is taken across the capacitor. The negative side of x(t) and y(t) is the common ground. The values of the elements are: R=8.1250 Ohms, C= 1 farad, and L= 1.0 Henry.
A wire is shown in Figure which is carrying 2.0 A in the presence of a magnetic field. Calculate the magnitude and direction of the force induced on the wire.
A star-bus hybrid topology consists of a main three branch star toplogy with each branch connecting three stations in a bus topology. This toplogy is changed to a new bus-ring hybrid topology with main five station bus topology.
Assuming that ideal filters are available, what is the lowest frequency at which the signal can be sampled and subsequently recovered in its analog form without distortion using a low pass filter?
A 50 mV signal is applied to the base of a properly biased transistor with r =10-ohm and Rc=560-ohm. Determine the signal voltage at the collector.
Determine the corona lossof a three phase, 220kV, 50 Hz and 200km long transmission line of three conductors each of radius 1 cm and spaced 5m apart inequilateral triangle formation. The air temperature is300C and the atmospheric pressure is 760mm..
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