addition/subtraction
yes
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Answers.com "operates" across all time zones.
sorry dont know that one:(
If you know someone who lives in New Zealand, you can check the time in New Zealand simply by asking him / her. If you have a smart phone, you can calculate time zones in virtually every nation in the world.
It is infinite, since mathematical knowledge is not destroyed with the passage of time.
Divided the United States into time zones
If you mean time zones. There is one. Russia has 7 time zones.
Like any other time piece, it is used to calculate how much time has passed with the emphasis being on time in different locations.(i.e. Countries, Time zones, Cities)
there are 24 time zones
There are 24 standard time zones in the world, each typically representing one hour of time difference from Coordinated Universal Time (UTC). However, due to various factors such as political boundaries and daylight saving time, the actual number of time zones in use can be greater, with some regions having offsets of 30 or 45 minutes. Additionally, some areas do not adhere strictly to these time zones, leading to further variations. Overall, while the mathematical basis is 24, the practical application results in a more complex system.
Flight time (or length) will not be affected by time zones. The time that you arrive will be, however. It still takes a certain number of hours to get to a certain location, and time zones only affect what time it will be when you arrive, not the length of the trip. If you are implying what time it will be when you do arrive, it depends on which direction you are going. If you are going west, subtract an hour per time zone. If you are going east, add an hour per time zone.