If Earth had its orbit changed so that at all points along its orbit itwas always the samedistance from the Sun (circular orbit), how would this affect the seasons on Earth?
a) longer than they are now.
b) reversed in order (winter, fall, summer, spring).
c) the same as they are now.
d) there would no longer be seasons.
e) shorter than they are now.
Ans: c) the same as they are now.
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The index of refraction for red light in water is 1.331 and for blue light is 1.340 . If a ray of white light enters the water at an angle of incidence of 83.00°, what are the underwater angles of refraction for the blue and red components of the light?
For establishing an experimental station that carries out mineral prospecting on the Moon and also houses periodic human visits for space-based explorations, a cooling (or thermal management) system is to be designed for the high-powered electronic systems that are needed to operate the controls. One of the most effective methods for large heat flux dissipation is to use phase change, or boiling, as the primary convection mechanism. For designing one such pressurized system, calculate the maximum heat flux attainable in nucleate boiling with saturated water at 200 kPa pressure. Note that the gravitational field on the Moon surface is 1.622 m/s2 , which is approximately a little less than one- sixth that on Earth.
GIVEN
FIND
? The maximum heat flux (q"max)
ASSUMPTIONS
? Steady state conditions
? Nucleate pool boiling
PROPERTIES AND CONSTANTS
From Appendix 2, Table 13, for water at 200 kPa
From Table 9.2, the surface tension (o) = 0.0547 N/m
A 1200 W toaster does enough work in 10 seconds to raise an 80 kg man to a height of 15 meters
What will be an ideal response?
A system for which there are no outside effects is said to be ______________
Fill in the blank(s) with correct word