The 100 Year Starship initiative aims to devise a plan for sending a crewed spacecraft to a nearby star
A) at a cost of less than a 100 billion US dollars
B) with a travel time of one century or less
C) within the next century
D) a hundred light years distant
B
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Free Fall: A ball is thrown straight up, reaches a maximum height, then falls to its initial height. Which of the following statements about the direction of the velocity and acceleration of the ball as it is going up is correct?
A. Both its velocity and its acceleration point upward. B. Its velocity points upward and its acceleration points downward. C. Its velocity points downward and its acceleration points upward. D. Both its velocity and its acceleration points downward.
Newton's Second Law in 1 Dimension: A block is on a frictionless table, on earth. The block accelerates at 5.3 m/s2 when a 10 N horizontal force is applied to it. The block and table are set up on the Moon where the acceleration due to gravity is 1.62 m/s2. A horizontal force of 5 N is now applied to the block when it is on the Moon. The acceleration imparted to the block by this force is closest to
A. 2.7 m/s2. B. 2.4 m/s2. C. 2.9 m/s2. D. 3.2 m/s2. E. 3.4 m/s2.
Which of the following web video formats is a common format used by digital video cameras?
A. .avi B. .mov C. .mpeg D. .wmv
The most striking and largest valley in the solar system is
A) the Grand Canyon in Arizona. B) Gwenivere on Venus. C) the Discovery Scarp of Mercury. D) Valles Marineris on Mars. E) Valhalla on Callisto.