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A cold beverage can be kept cold even on a warm day if it is slipped into a porous ceramic container that has been soaked in water. Assume that energy lost to evaporation matches the net energy gained via the radiation exchange through the top and side surfaces. The container and beverage have temperature T = 14.0 ?C, the environment has temperature Tenv = 34.0 ?C, and the container is a cylinder with radius r = 2.55 cm and height 12.8 cm. Approximate the emissivity as ? = 0.942, and neglect other energy exchanges. At what rate dm/dt (in mg/s) is the container losing water mass?
A high-E string on a guitar has a length of 0.635 meters and a mass of 2.51E-4 kg (both of these refer only to the "speaking" section of the string). What is the tension on the string
An open container holds ice of mass 0.530 kg at a temperature of -15.7 Celsius . The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 810J/minute .
An electric power station is producing 1.60 × 103 W of power that is to be sent to a small town located 13 km away, Find the power lost in heating the wires
A satellite is in geosynchronous orbit., What is the satellite's speed and What additional speed is required for the satellite to escape Earth's gravity completely
A train is moving parallel and adjacent to a highway with a constant speed of 33 m/s. What is the speed of the car just as it passes the train
A 25 kg child on a 2.0 m swing is released from rest when the swing supports make the angle of 30.0 degrees with the vertical.
there are 4 charges located on the corners of a square of side d. q1(top left = +1q) q2(top right= -1q), compute the electric potential at the center of the square
Calculate the mass difference in atomic mass units, between the helium nucleus and its constituent nucleons
A speed skater moving across frictionless ice at9.6m/s hits a 5.0 m wide patch of rough ice. What is her acceleration on the rough ice
A concave mirror forms a real image which is twice the size of the object. calculate the radius of curvature of the mirror
The battery charger for an MP3 player contains a step-down transformer with a turns ratio of 1:27, What voltage does the secondary coil of the transformer provide
A motorcycle has a constant speed of 24.0 m/s as it passes over the top of a hill whose radius of curvature is 131 m. The mass of the motorcycle and driver is 348 kg.
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