A laser beam is incident from the air at an angle of 30.00° to the vertical onto a solution of Karo syrup in water. If the beam is refracted to 19.24° to the vertical, what is the index of refraction of the syrup solution?
1.517
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A quantity that is a measure of how the distance traveled changes with time is
A. acceleration. B. velocity. C. force. D. speed. E. momentum.
What makes a worldview reductionist?
a. Believing that the universe is getting smaller. b. Believing that the behavior of parts can be explained by the behavior of the complex systems they create. c. Believing that the behavior of complex systems can be explained by the behavior of the small parts that create them. d. Believing that complications can be ignored in analyzing problems. e. Believing that theory of everything that reduces everything to one explanation can be found.
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 816 and 260°C, respectively. Determine the rate of heat transfer by radiation between the plates in W/m2 and the radiative heat transfer coefficient in W/(m2 K).
GIVEN
• Two large parallel plates, approximately black bodies
• Temperatures
? T1 = 816°C = 1089 K
? T2 = 260°C= 533 K FIND
(a) Rate of radiative heat transfer (qr/A) in W/m2 (b) Radiative heat transfer coefficient (hr) in W/(m2 K) ASSUMPTIONS
• Steady state prevails
• Edge effects are negligible
SKETCH
PROPERTIES AND CONSTANTS
Stefan-Boltzmann constant (?) = 5.67 ? 10–8 W/(m2 K)
Ice has a lower density than water because ice
A) sinks. B) molecules are more compact in the solid state. C) molecules vibrate at lower rates than water molecules. D) is composed of open-structured crystals. E) density decreases with decreasing temperature.