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Question: Assume that a selective repeat system has the property that the sending DLC always finds out whether a given transmitted packet was successfully received during or before the βth frame transmission following the frame in which the given packet was transmitted. Give a careful demonstration that the sending DLC need never save more than β + 1 unacknowledged packets.
A hiker walks along the city streets 11 km north, then 10 km east. What is the direction of the displacement vector in degrees counter clockwise from East?
A 2.00×10^4 kg railroad car is rolling at 4.00m/s when a 5000kg load of gravel is suddenly dropped in. What is the car's speed just after the gravel is loaded
In a series L-R-C circuit, the components have the following values: L = 18.0 mH, C = 170 nF, and R = 380 ohms. The generator has an rms voltage of 120 V and a frequency of 1.25 kHz. Determine the average power supplied by the generator. P=_____W Det..
A sound wave of frequency 850 Hz propagating through air has apressure amplitude of 6.5 Pa. What are the (a) Wavelength, Particle displacement amplitude
Resistances of 2.9 ?, 4.5 ?, and 6.8 ? and a 17.1 V battery are all in series. Find the potential difference across the first (2.9 ?) resistor.
Copper and aluminum are being considered for a high-voltage transmission line that must carry a current of 54 A. The resistance per unit length is to be 0.140 Ω/km. Compute for each choice of cable material the currentdensity.
What effects occur at about this concentration, and why - Calculate the donor ionization energy
The hour hand on a certain clock is 9.0 centimeter long. Determine the tangential speed of the tip of this hand
A 1kg ball released from horizontal attatched to a 2.5 m string collides ellastically with a 2 kg block at rest. what is the speed of the block after the collision.
A compound microscope has a barrel whose length is 16.4 cm and an eyepiece whose focal length is 1.7 cm. The viewer has a near point located 25 cm from his eyes. What focal length should the objective have so the angular magnification of the microsco..
A 0.04 kilogram lead bullet traveling 209 meter per second strikes an armor plate and comes to a stop. find what is its temperature change
A weight lifter raises a 1021 N weight a vertical distance of 1.60 m in a time interval of 2.20 s. Compute the power provided by the weight lifter's force
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