1item 1 item 1 1.25 points circular ceramic plate that can be modeled as a blackbody is being heated by an electrical heater. the plate is 30 cm in diameter and is situated in a surrounding ambient temperature of 15°c where the natural convection heat transfer coefficient is 12 w/m2·k. if the efficiency of the electrical heater to transfer heat to the plate is 80%, determine the electric power that the heater needs to keep the surface temperature of the plate at 180°c

well,it would be nice to have the following lol. um try mph or kph,kps? hope this /:

elliptical, as shown by most projections

answer :   (c)   0.12 c°

explanation :

it is given that all the gravitational potential energy is converted to thermal energy.

so, the thermal energy is balanced by gravitational potential energy.

gravitational potential energy,

and amount of heat is,

where, c is specific heat.

so,

or

hence, this is the required solution.

correct option is (c)   0.12 c°.