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.)

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.

i think the answer is a, hope this : )

report!

explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."