You see colors with a prism because of

a. interference
b. diffraction
c. specular reflection
d. dispersion
e. polarization


D

Physics & Space Science

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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

Physics & Space Science

On the main screen of the interactive figure, select "Parallax", then select the "Introduction to Parallax" button. Click the play button to watch the animation, and watch how the motion of the photographer (lower window) affects what the camera sees (upper window). Which of the following statements correctly describes what is really happening? (Note: You need not continue with the next button to answer this question.)

A. The photographer is moving, but the person being photographed and the trees are staying still. B. The trees are moving more slowly than the person being photographed, who is moving more slowly than the photographer. C. The photographer is staying still, but the person being photographed and the trees are moving. D. The photographer, the person being photographed, and the trees are all moving at the same speed.

Physics & Space Science

Conversion of Units: There are 640 acres in a square mile, and 5280 feet in 1.00 mile. What is the length in feet (to the nearest foot) of the side of a square having an area of 1.00 acre?

A. 660 feet B. 209 feet C. 165 feet D. 412 feet E. 435 feet

Physics & Space Science

A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the vertical height of the stairs is 20 meters, the person's power output is __________

Fill in the blank(s) with correct word

Physics & Space Science