The fastest we could accelerate a nuclear-powered rocket to is approximately
A) 50% of the speed of light
B) 0.001% of the speed of light
C) 0.1% of the speed of light
D) 10% of the speed of light
D
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The rapid rotation in the outer disk suggests that our galaxy is more massive than previously thought
a. True b. False Indicate whether the statement is true or false
Exhibit 5-2
A 4.00-kg block is suspended from the roof of an elevator. A 2.00-kg block is suspended from the 4.00-kg block. The tensions in strings 1 and 2 are labeled 
and 
.
?
?
Use this exhibit to answer the following question(s).
Refer to . When the elevator accelerates upwards with an acceleration of 2.20 m/s2, the magnitudes of 
and 
are
A. 30.4 N; 15.2 N.
B. 39.2 N; 19.6 N.
C. 45.6 N; 15.2 N.
D. 48.0 N; 24.0 N.
E. 72.0 N; 24.0 N.
Which of the following is not true for both the photon and the neutrino
a. Both are uncharged. b. Both have spin ?. c. Both can carry different amounts of momentum. d. Choose this answer if all of the above are true.
For normal household temperatures, a comfortable relative humidity is
a. 100% b. 0% c. 25% d. 50%