The jovian planets in our solar system are
A) Jupiter, Saturn, Uranus, and Neptune.
B) Mercury, Venus, Earth, and Mars.
C) Pluto and Eris.
D) Io, Europa, Ganymede, and Callisto.
A) Jupiter, Saturn, Uranus, and Neptune.
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A hot-wire anemometer is used to determine the boundary layer velocity profile in the air flow over a scale model of an automobile. The hot-wire is held in a traversing mechanism that moves the wire in a direction normal to the surface of the model. The hot-wire is operated at constant temperature. The boundary layer thickness is to be defined as the distance from the model surface at which the velocity is 90% of the free stream velocity. If the probe current is I0, when the hot-wire is held in the free stream velocity, U?, what current indicates the edge of the boundary layer? Neglect radiation heat transfer from the hot-wire and conduction from the ends of the wire.
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