Jeff Root wrote:
> George Dishman wrote:
> > (3) AND (4) ARE QUESTIONS, NOT REASONS.
> Actually they're scenarios, which were described in order
> to pose and answer the questions.
Agree. George is running interference
> Of course, a scenario doesn't cause Doppler shift, any
> more than a question does.
> The question is:
> What causes the Doppler shift in scenario (3)?
Make that question (a)
Answer: Change in position at instant of firing
What causes the Doppler shift in scenario (4)?
Answer: Increased bullet velocity
.........(for an extra 1/2 mark, the position change is incidental)
Which of the two ACTUALLY caused the Doppler shift, and where is the
Answer: (4), because it demonstrated increased kinetic energy delivered
to the target, whereas (3) did not.