Engineering, 01.04.2021 04:10, harlon852
A block of mass =2.95 kg slides along a horizontal table with speed 0=8.50 m/s. At =0, it hits a spring with spring constant =45.00 N/m, and it also begins to experience a friction force. Two illustrations of a horizontal box spring system. The top illustration shows a box traveling to the right at velocity v subscript 0 on a horizontal surface towards a relaxed spring. The spring rests on the surface and is attached to a wall on its right end. The bottom illustration shows the box at rest against the left end of the spring. The spring has been compressed by an amount delta x. The coefficient of friction is given by =0.300. How far has the spring compressed by the time the block first momentarily comes to rest?
Answers: 2
Engineering, 04.07.2019 18:20, maustin5323
Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]
Answers: 1
Engineering, 04.07.2019 18:20, miguel454545
Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.
Answers: 1
A block of mass =2.95 kg slides along a horizontal table with speed 0=8.50 m/s. At =0, it hits a spr...
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