Which of these time measurements is the smallest? A) 0.02 seconds. B) 0.02 teraseconds. C) 2,500 milliseconds. D) 25,000 nanoseconds

To answer the question, convert all of these measurements to a common unit. I choose seconds as the basis.

(a) 0.02 seconds

(b) 0.02 teraseconds x (10^12 s / 1 terasecond) = 2x10^10 seconds

(c) 2,500 milliseconds x (1 s / 1000 ms) = 2.5 seconds

(d) 25,000 nanoseconds x (1 x 10^-9 s / 1 nanosecond) = 2.5 x 10^-5 seconds

The answer is letter D.

In order to answer the question, we convert the measurements given to a common base unit. For this case, we use seconds.

A) 0.02 seconds

B) 0.02 teraseconds x (10^12 s / 1 terasecond) = 2x10^10 seconds

C) 2,500 milliseconds x (1 s / 1000 ms) = 2.5 seconds

D) 25,000 nanoseconds x (1 x 10^-9 s / 1 nanosecond) = 2.5 x 10^-5 seconds

Therefore, among the choices listed above the correct answer is D.