To express the speed of the supersonic jet, which is 130000 m/s in the standard form, we write it as $1.3 \times 10^{a}$ m/s. The value of a is
___.

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Solution

Speed of the jet = 130000 m/s = 13 $\times$ 10000 m/s = 13 $\times$ $10^{4}$ m/s = 1.3 $\times$ $10^{5}$ m/s

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