Escape speed from Earth is
A) 8 km/s.
B) 9.8 km/s.
C) 11.2 km/s.
D) 42.2 km/s.
Answer: C
Physics & Space Science
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a. 1952. b. 1869. c. 1938. d. 1905.
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Space itself is expanding
Indicate whether the statement is true or false
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a. a line perpendicular to the surface at a given point b. the angle between the surface and the light ray c. a line parallel to the surface at a given point d. the direction of a reflected ray
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