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Two metal rods, one silver and the other gold, are attached to each other. The free end of the silver rod is connected to a steam chamber, with a temperature of 100°C, and the free end of the gold rod to an ice water bath, with a temperature of 0°C. The rods are 5.0 cm long and have a square cross-section, 2.0 cm on a side. How much heat flows through the two rods in 60 s? The thermal conductivity of silver is 417 W/(m·K), and that of gold is 291 W/(m·K). No heat is exchanged between the rods and the surroundings, except at the ends.
An Atwood machine consists of two masses, = 6.5 and = 8.5 , linked by a cord that passes over a pulley free to rotate about a fixed axis. The pulley is a solid cylinder of radius = 0.40 and mass 0.80 .
A sphere, a solid cylinder and a thin-walled hollow cylinder all have the same mass and radius. Which one reaches the bottom of the incline first
A system consists of 4.0 kg of water at 85 degrees Celsius 35 J of work is done on the system by stirring with a paddle wheel, What is the change in internal energy of the system
A 31 μF capacitor is connected across a programmed power supply. find the power output from the power supply
3.00×104 of 300 C steam at a pressure of 20.0 is cooled until it condenses. What is the volume of the liquid water
A sample of ethyl alcohol (C2H5OH) has a density of 806 kg/m3 and a volume of 2.94 x 10-3 m3. find the number of molecules in the sample
A child, hunting for his favorite wooden horse, is running on the ground around the edge of a stationary merry-go-round. What is the shortest time it takes for the child to catch up with the horse
A spring stretches 0.05 m when a 0.3 kg mass is suspended from it. find the charecteristic frequency of this mass on the spring
Find the charge-to-mass ratio of an unknown point charge that is repelled strongly enough from a single electron to be suspended motionless against its own weight
A coaxial cable has a capacitance of 3.0 pF. The inner conductor has a radius of 1.0 mm, Find the length of the cable
A piece of copper wire joins a piece of aluminum wire whose diameter is twice that of the copper. The same current flows in both wires, Compare the drift speeds in each
If a hot air balloon floats at a constant elevation (it has reached equilibrium) where the local atmospheric pressure is 98 kPa (abs) and outside air temperature is 285 K, and the hot air inside the balloon is at 400 K
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