Homework Answers
part(A)
time taken for flash at explosion1 to reach t = d/c = 500/(3*10^8) = 1.67 us
therefore the firecracker1 explode at time t1 = 4 - 1.67 us = 2.33 us <<<-------ANSWER
=================
part B
time taken for flash at explosion1 to reach t = d/c = 350/(3*10^8) = 1.17 us
therefore the firecracker2 explode at time t2 = 4 - 1.17 us = 2.83 us <<<-------ANSWER
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