By how much has entropy of cube-water system changed
An 11.0 g ice cube at -21.0°C is put into a Thermos flask containing 110 cm3 of water at 20.0°C. By how much has the entropy of the cube-water system changed when a final equilibrium state is reached?
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The binary star system Krell consists of two stars, Krell A and Krell B, orbiting each other, with no other ojects nearby. Find the ratio of the orbit speeds vA/vB.
The cup with water, do you see more of the penny, less of the penny or the same amount as the penny as you did without the water? Explain your answer.
A conducting rod AB of length d = 1.4 makes contact with the metal rails AD and BC as shown in the diagram. The apparatus is in a uniform magnetic field of flux density 380 , perpendicular to the plane of the diagram. Find the magnitude of the in
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A jetliner, traveling northward, is landing with a speed of 62.0 m/s. Once the jet touches down, it has 656 m of runway in which to reduce its speed to 11.6 m/s. Compute the average acceleration (magnitude and direction) of the plane during landin
Three charges, q1, q2, and q3, are located at the corners of an equilateral triangle with side length of 1.55 m. Find the work done in each of the following cases:
Several people are riding in a hot-air balloon. The combined mass of the people and balloon is 281 kg. The balloon is motionless in the air, because the downward-acting weight of the people and balloon is balanced by an upward-acting 'buoyant' for
A uniform rod of length 0.790 m and mass 14.5 kg is balanced on a sharp edge at 0.650 m from the left end. At the left end hangs a mass of 45.0 kg and the right end hangs an unknown mass so that the whole assembly is in equilibrium. Calculate the
One piston of a hydraulic lift holds 1.40x103 kg.The other holds an ice block (density = 917 kg/m3) that is 0.076 m thick. Find the first piston's area.
Two horizontal forces, 240 N and 156 N, are exerted on a canoe. If the these forces are applied in the same directions, find the net horizontal force on the crate.
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