Multiple Choice
A particle is moving the +x direction at speed c/2.Another particle is moving in the -x direction at speed c/2 toward the first particle.Which of the following best describes the speed of one particle as seen by an observer moving with the other particle?
A) c
B) some value less than 3c/4
C) some value more than 3c/4
D) 3c/4
Correct Answer:

Verified
Correct Answer:
Verified
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