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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??
A 1.80-kg object attached to a spring moves without friction (b = 0) and is driven by an external force given by the expression F = 6.00sin(2?t), Find the resonance angular frequency of the system
In an echolocation lab, a student measures the time from the first click of the fingers to the first echo to be 0.0062. what should the student calculate for the length of the tube
The masses of Chuck and Jackie are both m1. Chuck then picks up a motionless ball of mass m2, In the end, what is Jackie's speed with respect to Chuck
For the third circuit, consisting of a single battery and two light bulbs in parallel, What is the current through each bulb
A heat engine takes in 400J of energy from a hot reservoir and performs 35J of work in each cycle. obtain the energy expelled to the cold reservoir in each cycle
A machinist turns the power on to a grinding wheel, at rest, at time t = 0 s. The wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 66 rad/s. The wheel is run at that angular velocity for 37 s and then power is shu..
During an Apollo lunar landing mission, the command module continued to orbit the Moon at an altitude of about 111 km. How long did it take to go around the Moon once
a an electron in a hydrogen atom has orbital angular momentum 5 hbar. what is the smallest total angular momentum it
To save on heating costs, the owner of a greenhouse keeps 580 kg of water around in barrels. What is the minimum ampere rating of an electric heating system
Two round rods, one steel and the other copper, are joined end to end. Each rod is 0.795m long and 1.85cm in diameter. The combination is subjected to a tensile force with magnitude 3950N.
A 2kOhm resistor and 400mH inductor are connected in series to a 1300Hz generator with an rms voltage of 15V. what is the rms current in the current
A flower pot fell of a windowsill and falls past the window below. you may ignore air resistance. it takes the pot .470s to pass the window, which is 1.80m hight. how far is the top of window below the windowsill from w/c the flower pot fell.
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