Metal plates are being cooled with air blowing in parallel over each plate. the average friction coefficient over each plate is given as cf = 1.33(rel)-0.5 for rel < 5 × 105. each metal plate length parallel to the air flow is 1 m. determine the average convection heat transfer coefficient for the plate, if the air velocity is 7 m/s. evaluate the air properties at 20°c and 1 atm. given: the properties of air at 20°c and 1 atm are ν = 1.516 × 10−5 m2/s, ρ = 1.204 kg/m3, cp = 1007j/kg·k, and pr = 0.7309. (round the final answer to two decimal places.)

A26 cm object is 18 cm in front of a plane mirror. a ray of light strikes the object and is reflected off the mirror at a 42-degree angle. what is the angle of reflection? degrees what type of image is formed? what is the size of the image? cm

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

Choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. choose a realistic problem for which these are the correct freebody diagrams. be sure that the answer that the problem requests is consistent with the diagrams shown. a 1.0 kg block is placed on top of a 2.0 kg block. a horizontal rope pulls the 2.0 kg block across a frictionless floor with a force of 21.0 n. the coefficient between the two blocks is 0.75. does the 1.0 kg block on top slide?