2006-08-30 09:55:04 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Almost 2.
Tidal amplitude and cycle time
Since the Earth rotates relative to the Moon in one lunar day (24 hours, 48 minutes), each of the two bulges travels around at that speed, leading to one high tide every 12 hours and 24 minutes.
2006-08-30 10:02:43 · answer #1 · answered by Rolf H 2 · 1⤊ 0⤋
Seems to be the usual, (nearly) 2. For September 1 at Liverpool, high tide is at 04:30 BST and again at 17:05 BST, 12 hours, 35 minutes later. There are some places on earth that have only (nearly) 1 high tide daily, but Mersey does not seem to be one of them.
Spiggot is wrong about getting three high tides in one day. You can sometimes have only one, if it is around noon, for then the previous high tide will be in the previous day (before midnight) and the next high tide will be in the next day (after midnight) but you can never have three.
2006-08-31 02:39:48 · answer #2 · answered by ? 6 · 1⤊ 0⤋
approximately 2 high tides and 2 low tides a day. The link below will give you predicted High and Low water times and heights at Hale Head (other places also available on the web site) for the next 7 days.
2006-08-30 17:07:15 · answer #3 · answered by Martin G 4 · 1⤊ 0⤋
twice, but as the difference between high tides is a bit more than 12 hours, there will be some days when there is only one.
2006-08-30 17:23:54 · answer #4 · answered by mike-from-spain 6 · 0⤊ 0⤋
Agree, morning and evening. twice a day! Although the mersey does have its own rythmn!!!!!!
2006-08-30 17:02:32 · answer #5 · answered by sarkyastic31 4 · 0⤊ 0⤋
usually twice per day.
however the tidal cycle is just over 12 hours ( I think its 12 hourws 15 minutes per cycle, so effectively you get one full cycle per 24 hours
2006-08-30 17:09:35 · answer #6 · answered by Mark J 7 · 0⤊ 0⤋
should be twice
although there may be the odd day when you only get one or get three.
but on average two
2006-08-30 17:00:45 · answer #7 · answered by Anonymous · 1⤊ 0⤋