A picture window has dimensions of 1.40 m×m×2.50 mm and is made of glass 5.80 mm thick. On a winter day, the outside temperature is -16.0 ∘C∘C , while the inside temperature is a comfortable 20.5∘C. while the inside temperature is comfortable 19.5 degree C.

a. At what rate is heat being lost through the window by conduction?
b. At what rate would heat be lost through the window if you covered it with a 0.750 mm thick layer of paper ( thermal conductivity 0.0500 W/m. K).

a.

b.

Explanation:

a.Given

#To calculate the rate at which heat is being lost by conduction, we first calculate thermal resistance:

#The rate of heat loss can be determined from the equation:

=

Hence, the rate of heat loss through the window by conduction is

b.Given that thermal conductivity is 0.0500W/m.K and

#After covering the window with the paper, there will be additional thermal resistance:

#To calculate the rate of heat loss if window is covered,

#The rate of heat loss when the window is covered is

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

this is an example of "committed" time.

committed time, as contracted time, takes need over essential and available time since it is seen as profitable work. it alludes to the time allotted to keep up a home and family. at the point when a man is commuting using committed time this individual may feel that the drive is an obligation to family, for example, strolling youngsters to class or driving a mate to work. contracted and committed time clients may feel that their commute could really compare to the commute of important or leisure time clients on the grounds that their commute is profitable work. in this manner, they might be more disposed to pick a mechanized method of movement.