Initially a household freezer com- partment is filled with air at room temperature T, = 27.0°C. Then the door is closed and the cooling in the walls is turned on until the air temperature is at the recommended value of T₁ = -18.0°C. The door has height h=0.600 m and width w=0.760 m, with hinges on the left edge (and thus with a rotation axis there) and a handle on the right edge. Assume that the freezer is air- tight. What are (a) the pressure difference Ap between the inside and outside of the door, (b) the net force Fon the door from that pressure difference, and (c) the force F, needed to open the door by pulling on the handle perpendicular to the door?

Initially a household freezer com- partment is filled with air at room temperature T, = 27.0°C. Then the door is closed and the cooling in the walls is turned on until the air temperature is at the recommended value of T₁ = -18.0°C. The door has height h=0.600 m and width w=0.760 m, with hinges on the left edge (and thus with a rotation axis there) and a handle on the right edge. Assume that the freezer is air- tight. What are (a) the pressure difference Ap between the inside and outside of the door, (b) the net force Fon the door from that pressure difference, and (c) the force F, needed to open the door by pulling on the handle perpendicular to the door?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

Initially a household freezer com-
partment is filled with air at room temperature T = 27.0°C.
Then the door is closed and the cooling in the walls is turned on
until the air temperature is at the recommended value of T₁ =
-18.0°C. The door has height h=0.600 m and width w=0.760 m,
with hinges on the left edge (and thus with a rotation axis there)
and a handle on the right edge. Assume that the freezer is air-
tight. What are (a) the pressure difference Ap between the inside
and outside of the door, (b) the net force F on the door from that
pressure difference, and (c) the force F needed to open the door
by pulling on the handle perpendicular to the door?

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