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Application: λ/4 monopole. A quarter-wavelength monopole antenna is used at 100 MHz. The antenna is placed vertically above a conducting surface. Find:
(a) The antenna length.
(b) The radiation resistance of the monopole.
(c) The radiated power of the monopole for a given current.
(d) The directivity of the monopole.
It is desired to reduce the surface temperature by applying one of the diffuse coatings (A B, C) shown as follows, which coating wil1 result in the coolest surface temperature for the same amplifier operating and environmental conditions?
A cylindrical drill with radius r1 is used to bore vertically a hole through the centre of a sphere of radius r2.
a spool of mass m214 kg inner and outer radii p1.84 m and r 2.23 m respectively and the radius of gyration kg 2m is
Write a subroutine WILSON for implementing the Wilson method. Use this program to find the solution of Example 11.7.
A small, high-speed turbine operating on compressed air produces a power output of 0.1 hp. The inlet state is 120 psi, 200°F, and the exit state is 14.7 psi, - 20 F. Assuming the velocities to be low and the process to be adiabatic, find the required..
(a) Find the input-output relationship. (b) Determine whether the system is (i) memoryless, (ii) causal, (iii) linear, (iv) time inva riant, or ( v ) stable.
a vertical shaft whose cross sectional area is 0.8 cm2 is attached to the top of the piston. determine the magnitude f
fixed tempature points in the international tempature scale are phase equilibrium states for a varity of pure
A mass of 1.5 kg of air at 120 kpa and 24 degrees C is contained in a gas-tight, frictionless piston-cylinder device. The air is now compressed to a final pressure of 600 kPa. During the process, heat is transferred from the air such that the tempera..
Assuming that the occupants' body heat provides a continuous source of 320 W within the igloo, calculate the inside air temperature when the outside air temperature is Too = -40 C. Be sure to consider heat losses through the floor of the igloo.
Determine by direct integration the moment of inertia of the shaded area with respect to the x axis.
consider some hypothetical x - y - ion pair for which the equilibrium interionic spacing and bonding energy values are
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