Oil is cooled by spraying a mist of the hot liquid through cool air at T[infinity]=27oC. Two droplets, each of diameter D =100 μm and temperature 250oC, suddenly collide and coalesce into a single droplet. Determine the heat transfer rate from the oil to the air before and after coalescence of the droplets. The velocity of the droplets is V=5 m/s.

newton's first law of motion

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

d. platinum would have the greatest temperature increase because it has the lowest specific heat.