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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?
At what angle do the equipotentials intersect the edge of the conduction paper? why? Hint: the electric current flow at any point is in the direction of any directly proportional to the electric field vector.
A 1200 crate slides 15 down a ramp that makes an angle of 30 with the horizontal. how much thermal energy is created
A 5.0-g piece of copper is to be formed into a wire of radius 1.5 mm at a temperature of 40°C. What is the resistance of this wire
q1. a 280 block on a 50.0 -long string swings in a circle on a horizontal frictionless table at 80.0.what is the speed
Christian is making a Tyrolean traverse as shown in the figure. That is, he traverses a chasm by stringing a rope between a tree on one side of the chasm and a tree on the opposite side, 23m away.determine the tension force in the rope
A 0.148-A current is charging a capacitor that has square plates 6.00 cm on each side. The plate separation is 4.00 mm. Find the displacement current between the plates
Two lens system: The original object is 20 cm to the left of a lens with a focal length of +10 cm, Find the location and magnification of the final image. Be sure to show or tell me from where you are measuring this final location
an object moving with uniform acceleration has a velocity of 10.0 cms in the positive x-direction when its x-coordinate
Two thin coils of radius 3 cm are 20 cm apart and concentric with a common axis, What is the magnitude of the magnetic dipole moment of one of the coils of wire
The outside mirror on the passenger side of a car is convex and has a focal length of -6.0 m. Relative to this mirror, a truck traveling in the rear has an object distance of 9 m. Find the image distance of the truck. Find the magnification of the mi..
Find the steady-state temperature distribution in a solid cylinder of height 10 and radius 1 if the top and curved surface are held at 0 degrees and the base at 100 degrees.
a projectile is fired with an initial velocity of 35 m/s at an angle of 30 degrees above horizontal of a 30 feet tall building. find (a) the max height of the projectile
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