A solar collector is at 25ºC and is facing the night sky at -50ºC. If the collector emissivity is 0.9 and its absorptivity is 0.85, determine the net radiation of the solar collector.
What will be an ideal response?
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a. True b. False Indicate whether the statement is true or false
A 40.0-g block of ice at -15.00°C is dropped into a calorimeter (of negligible heat capacity) containing water at 15.00°C
When equilibrium is reached, the final temperature is 8.00°C. How much water did the calorimeter contain initially? The specific heat of ice is 2090 J/kg ? K, that of water is 4186 J/kg ? K, and the latent heat of fusion of water is 33.5 × 104 J/kg. A) 546 g B) 405 g C) 345 g D) 302 g E) 634 g
A diffraction grating has 5150 lines per centimeter ruled on it
What is the angular separation between the first- and the third-order bright spots on the same side of the central maximum when the grating is illuminated by a beam of light with wavelength 633 nm?