Yesterday your chronometer read 11h 59m 58s...

Question 1 / 2066636ee928f7522a1c51a796

Question 1 of 2066636ee928f7522a1c51a796

Yesterday your chronometer read 11h 59m 58s at the 1200 GMT time tick. Today your chronometer reads 12h 00m 00s at the 1200 time tick. What is the chronometer rate?

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Question 1 of 20

66636ee928f7522a1c51a796

Yesterday your chronometer read 11h 59m 58s at the 1200 GMT time tick. Today your chronometer reads 12h 00m 00s at the 1200 time tick. What is the chronometer rate?

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🔍 Key Concepts

• Chronometer error (fast or slow) relative to GMT • Chronometer rate as the daily change in error • How to compare readings on two different days at the same GMT time signal

💭 Think About

• First, decide on each day whether the chronometer is fast or slow compared to the 1200 GMT time tick and by how many seconds. • Then, determine how much the chronometer’s error has changed from yesterday to today. • Finally, think about whether the chronometer rate is expressed as a gain (+) or loss (−) of time per day and in what units.

✅ Before You Answer

• Be clear which day’s reading is fast or slow and by how much. • Confirm that the rate is the change in error per day, not the total error itself. • Check that the sign (+ or −) matches whether the chronometer is gaining or losing time each day.

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Question 1 of 20

Yesterday your chronometer read 11h 59m 58s at the 1200 GMT time tick. Today your chronometer reads 12h 00m 00s at the 1200 time tick. What is the chronometer rate?

-2s

Nil

+2s

12h

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