A solarium is approximated by the rectangular parallelogram shown. The floor is well insulated and all walls and ceiling have emissivity of 0.2. The floor temperature is 40ºF, the wall and ceiling temperature is 67ºF, and the window temperature is 12ºF. Construct an equivalent circuit for the solarium and determine the heat loss by radiation.
Physics & Space Science
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The potential energy of a 3.5 pC charge separated by 6.2 cm from a 1.6 
C charge is
A. 
B. 
C. 
D. 
E. 
Physics & Space Science
Find the binding energy (in MeV) of carbon-12. Assume: mC = 12.000 000 u m p = 1.007 825 u m n = 1.008 665 u u = 1.66 × 10^?27 kg
a. 14.8 b. 0.511 c. 9.11 d. 92.3 e. 46.2
Physics & Space Science
What year did people on Earth see the Crab Nebula explode?
A.) 1993. B.) 1877. C.) 1054. D.) 108 B.C. E.) Around 2,300 B.C.
Physics & Space Science
If two equipotent planes differ in potential by 1.0 volt, and the electric field between them is 20 N/C, what is the separation of the planes?
A. 20 cm B. 0.050 cm C. 5.0 cm D. 2.0 cm E. 4.0 cm
Physics & Space Science