The primary reason few SSTs were ever built was because
a. SSTs endangered the ozone layer.
b. SSTs were not economically viable.
c. the technology was risky and the planes likely to disintegrate in flight.
d. computers predicted that the bow wave would cause oxygen to recombine with nitrogenin the air
e. SSTs travel through the stratosphere.
B
Physics & Space Science
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Charles Messier mapped the night sky and identified many objects now known to be emission nebulae in his search for objects that might be confused with:
A) comets. B) asteroids. C) galaxies. D) dark nebulae. E) reflection nebulae.
Physics & Space Science
A moving electric charge or a current in a magnetic field may experience a(n) ______________
Fill in the blank(s) with correct word
Physics & Space Science
Thin Lenses: A plant that is 4.1 cm tall is 10.3 cm from a converging lens. You observe that the image of this plant is virtual and 6.2 cm tall. What is the focal length of the lens?
A. 6.8 cm B. -30 cm C. 16 cm D. 30 cm E. -16 cm
Physics & Space Science
All four jovian planets are made primarily of hydrogen and oxygen
Indicate whether the statement is true or false
Physics & Space Science