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Step-by-step explanation:
a) 3.6 * 10^12 nm = 3.6 * 10^12 * 10^-9 = 3.6 * 10^3 m
b) 2.5 * 10^-6 milliseconds = 2.5 * 10-6 * 10^-3 = 2.5 * 10^-9 seconds
c) 72 km/h = 20 m/sec
d) 2 km/sec. = 2 * 10^3 m/sec
e) 360 m/h = 360/3600 m/sec = 0.1 m/sec
f) 50 mm/sec = 50 * 10^-3 m/sec
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