If astronauts could travel at v = 0.90c, we on Earth would say it takes (4.2/0.90) = 4.7 years to reach Alpha Centauri, 4.2 lightyears away. The astronauts disagree. How much time passes on the astronaut's clocks?
a. 2.0 years b. 2.4 years
c. 1.4 years d. 3.0 years
a
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The ____________________ Tables were based on a heliocentric model of the universe and used elliptical orbits for the planets
Fill in the blank(s) with correct word
Although astronomers refer to the Galaxy's disk as rotating, the motion is really due to the ________ motion of each of the objects in the disk
Fill in the blank(s) with correct word
Impulse: A block of mass m = 5.6 kg, moving on a frictionless surface with a velocity of vi = 6.5 m/s to the right, collides with a block of mass M at rest, as shown in the figure. After the collision, the 5.6-kg block recoils with a velocity of vf = 0.70 m/s to the left. If the blocks are in contact for 0.20 s, what is the magnitude of the average force on the 5.6-kg block, while the two blocks are in contact?
A. 202 N B. 192 N C. 182 N D. 34 N E. 162 N
Which of the state vectors below is not physically equivalent to 
?
E. They are all equivalent.