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Digital communication exercises.
Letters drawn from a four-letter alphabet have the indicated probabilities.
Letter and probability
A 1/3
B 1/3
C 1/4
D 1/12
How many bits on the average be are going to be needed to represent this alphabet?
Consider an electron in the ground state of the hydrogen atom, separated from the proton by a distance of 0.0529 nm. Viewing the electron as a satellite orbiting the proton in the electrostatic potential, calculate the speed of the electron in its ..
a youngs double-slit interference experiment gives bright fringes separated by 30.5 cm on a screen when the experiment
A modified oscilloscope is utilized to perform an electron interference experiment. Electrons are incident on a pair of narrow slits 0.0720 µm apart. The bright bands in the interference pattern are separated by 0.400 mm on a screen 24.0 cm from the ..
Suppose that we have a mixture of N2 (g) and O2 (g) of unknown composition whose total pressure is 385 torr. If all the oxygen as is removed from the mixture by reaction with phosphorus
A 7.80-g bullet moving at 550 m/s penetrates a tree trunk to a depth of 6.1 cm. Use work and energy considerations to find the average frictional force that stops the bullet
A 80 kg man in a 7.0 kg chair tilts back so that all the weight is balanced on two legs of the chair. Assume that each leg makes contact with the floor over a circular area with a radius of 1.0 cm,
A diving bell in the shape of a cylinder with a height of2.80 m is closed at the upper end andopen at the lower end. How high does sea water rise in the bell
A particle of mass m kg is attached to one end A of a model spring OA of natural length L0 = 1.05 m and stiffness K N/m. The spring is hung vertically with the end O fixed and end A attach to the particle, which moves in a vertical line.
A cat dozes on a stationary merry-go-round, at a radius of 6.0 m from the center of the ride. What is the least coefficient of static friction between the cat and the merry-go-round
Consider a wheel on a racing bicycle. If the wheel has a mass of 0040 kg and an angular speed of 15 rad/s, what is the rotational kinetic energy of the wheel
How does the amount of water displaced depend upon the mass of the ice? Most ice has some air bubbles in it. What effect does this have on the mass of the ice
A parallel-plate air capacitor is made from two plates 0.070 square, spaced 9.3 apart. What must the potential difference between plates be to produce an energy density of.
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