BasicPhy_TUT2

BasicPhy_TUT2 - gas is W = 35 J and the heat added to the...

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Tutorial Two 1. (a) What is the internal energy of 1.0 mol of an ideal monatomic gas at 273 K? (b) Compute the specific heat at constant volume for monatomic helium gas (in J=kg K) from the molar specific heat at constant volume. The mass of a helium atom is 6.66 X 10 - 27 kg. 2. A sinusoidal transverse wave is traveling along a string toward decreasing x. Fig. 2 shows a plot of the displacement as a function of position at time t = 0. The string tension is 3.6 N, and its linear density is 25 g/m. (a) Find the amplitude of the wave. (b) Find the wavelength of the wave. (c) Find the wave speed of the wave. (d) Find the period of the wave. (e) Find the maximum speed of a particle in the string. (f) Write an equation describing the traveling wave. 3. Speakers A and B are vibrating in phase. They are directly facing each other, are 7.80 m apart, and are each playing a 73.0-Hz tone. The speed of the sound is 343 m/s. On the line between the speakers there are three points where constructive interference occurs. What are the distances of these three points from speaker A?
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4. When a gas is taken from a to c along the curved path in Fig. 4, the work done on the
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Unformatted text preview: gas is W = 35 J and the heat added to the gas is W = . 63 J. Along path abc, the work done on the gas is W = 48 J. (a) What is Q for path abc? (b) If P c = P b =2, what is the work done on the gas W for path cda? (c) What is Q for path cda? (d) What is U a -U c ? (e) If U d -U c = 5 J, what is Q for path da? 5. A thin, non-conducting rod carrying a uniform linear charge density λ is bent into a semicircle of radius r. Find the electric field at the center of curvature of the semicircle. 6. Two electrons are rotating in opposite directions in circular orbits of radius r in a Bismuth atom. A magnetic field of 0.5 T is applied perpendicular to the plane of rotation of the electrons. Show that one electron is speeded up by the magnetic field by an amount Δω = eB /(2 m e 29 and the other is slowed down by the same amount, Δω . Calculate the new angular frequency of electron and the change in total magnetic moment resulting from the orbital motion of each electron....
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This note was uploaded on 09/06/2010 for the course BSC PHY1417 taught by Professor Prof during the Spring '08 term at HKU.

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BasicPhy_TUT2 - gas is W = 35 J and the heat added to the...

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