Consider a cylinder of 20 mm in diameter (d) and 100 mm in length (l) that is installed in a duct. air moves in cross flow over the side surface of the cylinder at a temperature (t∞) and velocity (v) of 33.7 °c and 30 m/s, respectively. if the average cylinder surface temperature (ts) is maintained at 120 °c, what is the required power generation of the cylinder? note: (1) air properties can be found from table a.4 in the textbook. (2) the heat loss from the top and bottom surface of the cylinder is negligible. (3) use churchill and bernstein method to solve it.

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

hope this : d

what is the actual question though?

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.