Question

Example 2.6 Two clocks are being tested
against a standard clock located in a
national laboratory. At 12:00:00 noon by
the standard clock, the readings of the two
clocks are:
Clock 1 Clock 2
Monday
12:00:05 10:15:06
Tuesday
12:01:15 10:14:59
Wednesday
11:59.08 10:15:18
Thursday
12:01:50 10:15:07
Friday
11:59:15
10:14:53
Saturday
12:01:30 10:15:24
Sunday
12:01:19 10:15:11
If you are doing an experiment that requires
precision time interval measurements, which
of the two clocks will you prefer?​

Answer 1

Answer:Correct Option (b) Clock II

Explanation:

A simple look at the data shows that average reading of clock I is much closer to the standard time that average reading of clock II. Therefore, zero error in clock II is much larger than the zero error in clock I. But zero error can-always be corrected by applying necessary correction.

Now, over the seven days, range of variation of clock I is 12:01:50 - 11:59:08 = 162 s and range of variation of clock II is 10:15:24 - 10:14:53 = 31 s. Therefore, precision of clock ll is much better than the precision of clock I. We will prefer clock II.

Explanation: