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A 30-cm bar is made from putting together three 10-cm bars of steel, copper, and aluminium, each having cross-sectional area 4cm2. One end of the steel is in contact with a nice-water mixture. When the system comes into equilibrium,
a) What is the temperature at the end of each bar, and
b) At what rate is ice melting?
c) What is the effective thermal conductivity of the 3-barcombination?
d) Would your answers go up, go down, or stay the same if the order were changed to copper-steel-aluminium? (Do NOT solve the problem again to answer this question.) Describe.
question in order for a photon to eject an electron from a metal surface via the photoelectric effect the photons
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a small charged bead has a mass of 3.7 . it is held in a uniform electric field 200000 up. when the bead is released
A very large cylindrical tank vented to air contains a layer of oil on top of water. At the bottom of the container there is a horizontal pipe of very small radius, What is the unknown thickness of oil in the tank
A horizontal disk of mass 0.12kg and radius of 013m rotates freely about a vertical axis through its center with an angular speed of 5rad/s. What is the angular speed of the disk immediately after the material sticks to it
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An ordinary glass is filled to the brim with 325.0 mL of water at 100°C. If the temperaturedecreased to 21°C, how much water could be added to the glass
The total energy contained in a closed, sealed, rigid can of tuna is 3000. J with a total entropy of 2.8330 J/K. The ground state total energy, total entropy, and temperature of the system are 100.0 J, 0.0275 J/K, and 20.0°C,
Two steel wires are stretched under the same tension. The first wire has a diameter of 0.515 mm, and the second wire has a diameter of 1.19 mm. If the speed of waves traveling along the first wire is 46.0 m/s, what is the speed of waves traveling alo..
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