The wall of a furnace is made up of inside layer of silica brick 120 mm thick covered with a layer of magnetite brick 240 mm thick. the temperature at the inside of the silica brick wall and the outside surface of magnetite brick wall are 7250c and 1100c respectively. the contact thermal resistance between the two walls at the interface is 0.00350c/w per unit wall area. if the thermal conductivities of the silica and magnetite bricks are 1.7 w/m0c and 5.8 w/m0c, calculate: a. the rate of heat loss per unit area of walls, and b. the temperature drop at the surface.

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step-by-step explanation:

y htf dfh drthf hdt hdthyty hty

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.