A fluid at 40ºC flows at 8 m/s along a flat plate that is 3 m long. The plate is maintained at 100ºC. Determine the local convective heat transfer coefficient and the average convective heat transfer coefficient using 4 x 105 as the critical Reynolds number, for
a) Air at 100 kPa
b) Water at 100 kPa
You might also like to view...
Water vapor in the atmosphere can cause a greenhouse effect.
Answer the following statement true (T) or false (F)
An aluminum wing on a plane is 38 m long when the temperature is 20 oC. At what temperature (in oC) would the wing be 0.04 m shorter? Enter your answer to one decimal place. You should think about the physics of the situation before trying to solve the problem. (Hint: You are being asked for a temperature, not a temperature change)
How do we determine the amount of dark matter in elliptical galaxies?
A) We measure the orbital velocities of star-forming gas clouds around the outer portions of the galaxy. B) We measure the range of speeds of collections of stars at different distances from the galactic center and determine how much mass is interior to their orbits. C) We count the number of stars in the galaxy and determine its volume, so that we can calculate the galaxy's density. D) We search for dark lanes of dust and black holes within the galaxy. E) We measure how fast the galaxy rotates as a whole.
A small boat is moving at a velocity of when it is accelerated by a river current perpendicular to the initial direction of motion. If the acceleration of the current is 0.750 m/s2, what will be the new velocity of the boat after
A) 25.3 m/s at 82.4° from initial direction of motion B) 25.3 m/s at 7.59° from initial direction of motion C) 640.1 m/s at 82.4° from initial direction of motion D) 640.1 m/s at 7.59° from initial direction of motion