Two events, A and B, have space time coordinates (x1,y1,z1,t1) and (x2,y2,z2,t2) in the frame S and coordinates (x′1,y′1,z′1,t′1) and (x′2,y′2,z′2,t′2) \) in the frame S′ . S moves at a constant speed v relative to S′ . Suppose that A and B are simultaneous in S′ . The fact that "simultaneity is relative" means Select one: a. t1≠t2 b. t′1≠t′2 c. t′1≠t1 d. t′2≠t2

Figure 6 m/s 3 m/s 2 1 Part E What is the speed of ball 1 in a referece frame that moves with ball 2? V₁ = 跖 ΜΕ ΑΣΦ Submit Request Answer Part F ? m/s What is the direction of ball 1 in a referece frame that moves with ball 2? left O right ○ the ball is at rest Submit Request Answer Part G Complete previous part(s) Part H Complete previous part(s) Provide Feedback

The origins of two frames coincide at t = t' = 0 and the relative speed is 0.961c. Two micrometeorites collide at coordinates x = 129 km and t = 192 μs according to an observer in frame S. What are the (a) spatial and (b) temporal coordinate of the collision according to an observer in frame S'?

Suppose there are two rhinoceros who charge each other. According to a few observers on the ground, the rhinoceros on the left moved to the right at a speed of (1 - ϵ)c while the rhinoceros on the right moved to the left at a speed of (1 - ϵ)c. ϵ is in the range of 0 < ϵ < 1. How fast is the rhinoceros on the right moving in the frame of the rhinoceros on the left? (Show that this speed is less than c, no matter how small ϵ is)