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A rectangular antenna has a height of 3m and a width of 6 meters. It operates at a frequency of .5 GHz.
What are the two half-power angles?
What are the angles between the first nulls in both directions?
What is the gain (over an isotropic source) of this antenna?
Suppose the efficiency is less than one. How would it affect the gain?
A point moves along the x-axis with its position, x, at time t given by x(t) = t3 - 3t2 + 2t - 1. Which of the following is the acceleration when t = 2?
Bob connects a lamp of 34 Ohms resistance across a car battery of 12 volts. what would be the power dissipated by the lamp
Use Coulombs' law and integration to find the electric field inside a hollow cylindrical shell with surface charge density ps and surface radius a
A farsighted man uses eyeglasses with a refractive power of 2.10 diopters. Wearing the glasses 0.03 m from his eyes, What is the correct contact lens prescription
A point charge +6.7 uC is placed at the origin, and a second charge -3.6 uC is placed in the X - Y plane at (0.40 m , 0.55 m ). Where should a third charge be placed in the plane so that the net force acting on it is zero? Express your answers usi..
A uniform electric field exists everywhere in the x, y plane. This electric field has a magnitude of 6000 N/C, Find the magnitude of the net electric field at x = -0.18 m
A resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners.
Two heat reservoirs at temperatures 190°C and 60°C, respectively, are brought into thermal contact, What is the change in the entropy of the two-reservoir system
A transparent oil with index of refraction 1.22 spills on the surface of water (index of refraction 1.33), determine the thickness of the oil slick
You are asked to design a spring that will give a 1200-kg satellite a speed of 3.50 m/s relative to an orbiting space shuttle. What distance must the spring be compressed
A 450 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m, What is its average power output in watts and horsepower if this takes 7.30 s
A 17.00{\rm kg} lead sphere is hanging from a hook by a thin wire 3.30{\rm m} long, What must be the minimum initial speed of the dart so that the combination makes a complete circular loop after the collision
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