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An antenna with average noise temperature 60 K connects to a receiver through various microwave elements that can be modeled as an impedance matched attenuator with an overall loss of 2.4 dB and a physical temperatures of 275 K. The overall system noise temperature of the receiver Tsys 820 K.
If receiver has an available power gain of 110 dB and a noise bandwidth of 10 MHz, the available output noise power of receiver is??
around the core of a nuclear reactor shielded by a large pool of water cerenkov radiation appears as a blue glow.
What is the maximum rate of rotation. A moving electron passes near the nucleus of a gold atom, which contains 79 protons and 118 neutrons. At a particular moment electron is a distance of 7.5 x10 ^9 m from the gold nucleus.
At a grocery store, a spring scale (spring constant 450 N/m) hangs near the produce section. What is the velocity of the pan immediately after the oranges land on the pan
Estimate the pressure exerted on a floor by the one pointed chair leg (50 kg on all four legs) of area = 0.08 cm2
A physics student playing with an air hockey table (frictionless surface) , What is the angle of inclination
In a RLC series circuit, the resistor is 250 ohms, inductor is 0.6 H, capacitor is 3.5 micro Farads. What is the maximum voltage drop across the capacitor
An object is sliding on a horizontal surface. The coefficient of kinetic friction between the object and the surface is 0.250. how far will the object travel before it stops
A dance studio has flat mirrors on opposite walls, and multiple images are observed when a person stands between them, What is the image distance for the first image behind the north mirror
a fully charged 12.0 volt car battery rated at 850 amp hours is connected to a spotlight rated at 150 watts for 12 volts. what current soed the spot operate on
In 1956, Frank Lloyd Wright proposed the construction of a mile-high building in Chicago. find the change in your weight if you were to ride an elevator from the street level, where you weigh 810 N, to the top of the building
What are the strength and direction of the electric field at the position indicated by the dot in the figure below, in which q = 3 nC, d = 11 cm, and the positive x-axis points to the right?
Her speed when she is above the bar is 1.3 m/s. Neglect air resistance, as well as any energy absorbed by the pole, and find out her altitude as she crosses the bar.
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