An 8-m-internal diameter spherical tank made of 1 5-cm-thick stainless steel (e -15w im k) is used to store iced water at o c the tank is located in a room whose temperature is 25 °c the walils of the room are also at 25 "c the outer surface of the tank is black (emissvity ? =1), and heat transfer between the outer surface of the tank and the surroundings is by convection and radiation the convection heat transfer coefficients at the inner and outer surfaces of the tank are 80 w/m2 k and 10 w/m2 k respectively determine, (a) the rate of heat transfer to the iced water in the tank and (b) the amount of ice at 0 °c that melts dunng a 24 hour perod the heat of fusion of water at atmospheric pressure is h, -333 7kjikg (22)
Answers: 3
Physics, 22.06.2019 00:50
Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?
Answers: 1
Physics, 22.06.2019 16:40
Acapacitor is storing energy of 3 joules with a voltage of 50 volts across its terminals. a second identical capacitor of the same value is storing energy of 1 joule. what is the voltage across the terminals of the second capacitor?
Answers: 3
Physics, 22.06.2019 19:30
Aplayground slide is 8.80 ft long and makes an angle of 25.0° with the horizontal. a 63.0-kg child, initially at the top, slides all the way down to the bottom of the slide. (a) choosing the bottom of the slide as the reference configuration, what is the system's potential energy when the child is at the top and at the bottom of the slide? what is the change in potential energy as the child slides from the top to the bottom of the slide? (include the sign of the value in your answer.)
Answers: 3
An 8-m-internal diameter spherical tank made of 1 5-cm-thick stainless steel (e -15w im k) is used t...
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