In most places on the seacoast, there are two high and two low tides a day
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TRUE
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In order to conserve energy, the inner surface of double-glazed windows are treated with a low emissivity coating that reduces the emissivity of the uncoated surface from 0.95 to 0.5 for the coated surface. If the temperatures of the two glass panes are 20°C and 0°C, respectively, determine the reduction in heat transfer in a coated double-glazed window as compared with the uncoated one.
GIVEN
? Double glazed windows treated with low emissivity coating that reduce emissivity of uncoated
surface from ??1 =0.95 to ??2= 0.5.
? Temperature of glass pane 1 (T1)= 20°C = 293 K
? Temperature of glass plane 2 (T2) = 0°C = 273
FIND
Reduction in heat transfer in coated double glazed window as compared to uncoated one.
PROPERTIES AND CONSTANTS
From Appendix 1, Table 5, the Stephan-Boltzmann constant
Why does the Sun's image look distorted in shape at sunset?
A) The distortion arises because of the way air affects the paths of light. B) The distortion is an illusion that you notice by eye but does not show up in photographs. C) Air scatters different colors of light by different amounts. D) The distortion is an artifact of the photographic process that your eyes would not actually see.
What is the valence shell?
A) It is the outermost shell of electrons in an atom. B) It is the shell of electrons in an atom that is the least reactive. C) It is the last partially filled orbital in an atom. D) It is the shell of electrons in element V (atomic no. = 23). E) It is the same as the orbital configuration.
The linear momentum of an extended object is the product of the object's mass and the velocity of its center of mass
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