When is the next time Jack' clock will be exactly on time?

  • Thread starter Thread starter Greg Bernhardt
  • Start date Start date
  • Tags Tags
    Clock Time
AI Thread Summary
Jack's antique cuckoo clock loses 9 minutes every hour, leading to a significant time discrepancy. Despite this, the clock is observed to be accurate at noon on a Tuesday. The next instance when the clock will be exactly on time again is calculated to be at 4 AM the following Tuesday, which is 80 hours later. This calculation indicates that the clock will align correctly again after a total of 6 days and 16 hours, with some participants estimating it could also be around 8 PM on Friday.
Greg Bernhardt
Admin
Insights Author
Messages
19,773
Reaction score
10,726
Jack has an antique cuckoo clock. It's a lovely clock, but it runs too slowly; it loses 9 minutes of time every hour. Sam visits his friend Jack one day, and notices that the cuckoo clock is exactly on time at noon on Tuesday.
When is the next time Jack' clock will be exactly on time?
 
Physics news on Phys.org
4 am the following tuesday (6 days, 16 hours later)
 
Last edited:
in 80 hours from noon tuesday, they should agree

I suppose that is some time friday, 8 PM
 

Thread 'Predictions for the Nobel Prize in Physics 2025'

Similar to the 2024 thread, here I start the 2025 thread. As always it is getting increasingly difficult to predict, so I will make a list based on other article predictions. You can also leave your prediction here. Here are the predictions of 2024 that did not make it: Peter Shor, David Deutsch and all the rest of the quantum computing community (various sources) Pablo Jarrillo Herrero, Allan McDonald and Rafi Bistritzer for magic angle in twisted graphene (various sources) Christoph...
View full post »
Thread 'My experience as a hostage'

Thread 'My experience as a hostage'

I believe it was the summer of 2001 that I made a trip to Peru for my work. I was a private contractor doing automation engineering and programming for various companies, including Frito Lay. Frito had purchased a snack food plant near Lima, Peru, and sent me down to oversee the upgrades to the systems and the startup. Peru was still suffering the ills of a recent civil war and I knew it was dicey, but the money was too good to pass up. It was a long trip to Lima; about 14 hours of airtime...
View full post »

Similar threads

I How Does Time Dilation Affect Jill's Perception of Jack's Clocks?
Replies
2
Views
2K
I Clock Synchronization: Jack & Jill's View
Replies
18
Views
3K
What Happens to Time Zones When Flying at Earth's Rotation Speed?
Replies
9
Views
2K
Do Clocks A and B Show the Same Time After 72 Hours Despite Speed Differences?
Replies
5
Views
3K
Four Clocks Problem: Find Time When All 4 Clocks are Same
Replies
22
Views
5K
My list of the top five heavyweight boxers of all time
Replies
35
Views
5K
Length of time needed to measure digital clock accuracy
Replies
26
Views
4K
B Defining 1 Second: The History and Science Behind Time Measurement
Replies
17
Views
3K
Is There a Time When a Watch's Hands Align?
Replies
6
Views
1K
B Why do clocks experience time dilation in special and general relativity?
Replies
31
Views
4K

Hot Threads

Recent Insights

Back
Top