FIGURE shows Peggy standing at the center of her railroad car as it passes Ryan on the gro...

FIGURE shows Peggy standing at the center of her railroad car as it passes Ryan on the ground. Firecrackers attached to the ends of the car explode. A short time later, the flashes from the two explosions arrive at Peggy at the same time.

a. Were the explosions simultaneous in Peggy’s reference frame? If not, which exploded first? Explain.

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b. Were the explosions simultaneous in Ryan’s reference frame? If not, which exploded first? Explain.

FIGURE