Imagine that you send out a light flash at t60 s as


Imagine that you send out a light flash at t=6.0 s as registered by your clock, and you receive a return reflection showing your kid brother making a silly face at t=12.0 s as registered by your clock.

(a) At what time did your brother actually make this silly face?

How far is your brother away from you? Express in

(b) seconds and

(c) kilometers?

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Physics: Imagine that you send out a light flash at t60 s as
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