Physics, 11.04.2020 03:49 ItzAquaZ1449
A heat exchanger for heating liquid mercury is under development. The exchanger is visualized as a 15cm-long and 0.3m-wide flat plate. The plate is maintained at 70 °C and the mercury flows parallel to the short side at 15 °C with a velocity of 0.3 m/s. a) Find the local drag (in N/m2 ) at the midpoint of the plate. b) Find the total drag force (in N) on the plate. c) Find the local heat transfer rate (in W/m2 ) at the midpoint of the plate. d) Find the total heat transfer rate (in W) on the plate.
Answers: 2
Physics, 21.06.2019 23:30
An object starts from rest at point f and speeds up continuously as it moves around an oval. a. choose a point about 1/8 th of the way around the oval from point f, and label it point g. draw a vector to represent the velocity of the object at point g. b. determine the change in velocity vector between points f and g.
Answers: 1
Physics, 22.06.2019 06:10
Africtionless piston-cylinder contains 50 l of saturated liquid r-134a. the piston has a mass and an area resulting in an applied pressure of 500 kpa on the refrigerant. the refrigerant is now heated until its temperature rises to 70∘c. calculate the work (in kj) done during this process.
Answers: 3
Physics, 22.06.2019 14:00
How to tell if two objects are in thermal equilibrium 1.the objects have the same temperature 2.the objects are the same size 3.the objects are touching each other 4.the objects temperatures are changing
Answers: 1
Physics, 22.06.2019 23:50
An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?
Answers: 2
A heat exchanger for heating liquid mercury is under development. The exchanger is visualized as a 1...
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