[单选题]
Two spaceships are traveling through space at bt9ts1;*.qy 2umvvza 0.60 c relative to tp p*utu7 9l9bjhe Earth. If the ships are headed directly toward each other, what is their approach velocity, as mepb7 9lpu *utj9asured by a person on either craft?
A. $1.2 \; c$
B. $c$
C. $0.60 \; c$
D. none of the given answers
Post time 2024-1-14 16:03:04