Physics, 10.07.2019 18:10 princessdriayp6a2o8
The wall of a building measures 8 m horizontally by 3 m vertically, and consists of 250- mm-thick concrete. on the inside it is covered with 140-mm-thick extruded polystyrene insulation. the wall has a 1.4 m × 1.0 m door of 12-mm-thick plywood with no insulation. outside and inside air temperatures are -5°c and 18°c, respectively. the corresponding convection heat transfer coefficients are 38 w m2 k-1 and 7 m-2k-1. calculate the rate of 1151 (a) heat transfer through the wall
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Physics, 22.06.2019 19:30
Complete these sentences. if a roller coaster train has a potential energy of 1,500 j and a kinetic energy of 500 j as it starts to travel downhill, its total energy isj. once the roller coaster train gets closer to the bottom of the hill, its kinetic energy increases to 1,100 j, and its potential energy decreases to j. when the train reaches the bottom of the track and is traveling along the ground, its kinetic energy isj.
Answers: 1
Physics, 23.06.2019 00:30
3. which is not a primary color of light? blue red green yellow
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Physics, 23.06.2019 00:30
Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving
Answers: 1
The wall of a building measures 8 m horizontally by 3 m vertically, and consists of 250- mm-thick co...
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