Radio astronomy uses ________ to achieve better resolution than optical telescopes
Fill in the blank(s) with correct word
interferometry
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Estimate the heat loss per unit area of a vertical south-facing wall of a large office building when the air temperature is -10ºF and the wall temperature is 5ºF.
What will be an ideal response?
A compressible fluid is flowing through a pipe with a constriction. The diameter of the narrow section is 0.8000 the diameter of the wide section. The velocity of the fluid in the narrow section is 1.700 the velocity of the fluid in the wide section. If the density of the compressible fluid is 1.200 kg/m3 in the narrow section, then what is the density of the fluid in the wide section?
A. 1.112 
B. 1.256
C. 1.300
D. 1.333
E. 1.400
Which have more massive supermassive black holes, spiral galaxies like Andromeda or elliptical galaxies like Cygnus A?
A) Both are the same. B) Spirals. C) Ellipticals. D) Neither type of galaxies has supermassiave black holes. E) Supermassive black holes do not exist at all.
Why is it so difficult to take pictures of extrasolar planets?
A) Extrasolar planets give off light at different wavelengths than planets in our solar system. B) No telescope is powerful enough to detect the faint light from a distant planet. C) Their light is overwhelmed by the light from their star. D) Telescopes are too busy with other projects.