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GRE Physics GR1777, Problem 010 Solution
GRE Physics GR 1777 Problem Solution 10. Quantum Mechanics (Photoelectric effect) Solution The maximum kinetic energy of the emitted electrons is $latex E_{max} = h\\nu -w$, where $latex E_{max}$ is the maximum kinetic energy of the emitted electrons from the metal surface, $latex \\nu$ is the frequency of light, and $latex w$ is the work…
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GRE Physics GR1777, Problem 009 Solution
GRE Physics GR 1777 Problem Solution 009. Classical Mechanics (Kinematics) Solution $latex \\frac{1}{2}Mv^2 = \\frac{3}{2}kT$, where $latex v$ is the root-mean-square speed of molecules in an ideal gas, $latex M$ is the mass of the molecule, and $latex T$ is the temperature of the system. Since $latex k = \\Big( \\frac{n}{N} \\Big) R$, then $latex…
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GRE Physics GR1777, Problem 008 Solution
GRE Physics GR 1777 Problem Solution 008. Thermodynamics (Laws of thermodynamics) You should know about First law of thermodynamics $latex dQ = de + PdV$ where $latex Q$ is the amount of heat, $latex e$ is the internal energy, $latex P$ is the pressure, and $latex V$ is the volume of the system. Solution If…
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GRE Physics GR1777, Problem 007 Solution
GRE Physics GR 1777 Problem Solution 007. Thermodynamics (Thermodynamic Processes) Solution A reversible process in thermodynamics is a process that has a constant entropy. Answer (C) The entropy of the system and its environment remains unchanged. References https://en.wikipedia.org/wiki/Reversible_process_(thermodynamics)
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GRE Physics GR1777 Problem 005 Solution
GRE Physics GR 1777 Problem Solution 005. Electrodynamics (Maxwell\’s Equations) Solution In Maxwell\’s equations, Ampère\’s law (with Maxwell\’s correction) is $latex \\nabla \\times \\vec{B} = \\mu_0 \\vec{J} + \\mu_0 \\epsilon_0 \\frac{\\partial \\vec{E}}{\\partial t}$. We can write this equation as $latex \\nabla \\times \\vec{B} – \\mu_0 \\epsilon_0 \\frac{\\partial \\vec{E}}{\\partial t} = \\mu_0 \\vec{J}$, where $latex \\vec{J}$…
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GRE Physics GR1777 Problem 004 Solution
GRE Physics GR 1777 Problem Solution 004. Electrodynamics Solution Net resistance in a parallel circuit is $latex \\frac{1}{R_{parallel}} = \\frac{1}{R_1} + \\frac{1}{R_2} = \\frac{1}{1} + \\frac{1}{2} = \\frac{3}{2}$ $latex \\therefore R_{parallel} = \\frac{2}{3}$ Then, total resistance in circuit is $latex R_{total} = 1 + \\frac{2}{3} = \\frac{5}{3}$. By the Ohm\’s law, $latex V = IR$,…
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GRE Physics GR1777 Problem 003 Solution
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GRE Physics GR1777 Problem 002 Solution
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GRE Physics GR1777 Problem 001 Solution
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