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posledela
4 years ago
10

A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound, and finds it to be 0.400s.

Physics
1 answer:
stiks02 [169]4 years ago
3 0

Answer:

a) 138.09m

b) 138.09m

Explanation:

The detailed steps and appropriate formula used is as shown in the attached file.

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Find the equivalent resistance Req between terminals a and b if terminals c and d are open and again if terminals c and d are sh
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When c and d are open:

Terminals c and d are open.. If you  redraw the circuit as below, you can see that the two resistors in the first  column are in parallel as, they are connected together at both pairs of terminals  (due to the short).

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Both of these resistor lie in a single path placing the resistors in series to one another, hence

Req = R3 + R1 = 180 + 540 = 720 ohms

Answer:720 ohms

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