The "fin"is actually called the Gnomon.
Its alignment in azimuth on a horizontal dial is N-S, or vertical on a wall-mounted dial, andit tapers into the dial Northwards or upwards respectively;but its angle is calculated from the angle of latitude in which the instrument is to be placed.
Fin pitch refers to the spacing between the fins of a finned heat exchanger. It is often confused as a measure of the fin density which is expressed in terms of fins per inch (FPI). Fin pitch is measured from the centerline of one fin to another and can be determined from summing the fin spacing (distance between fins) and the fin thickness. Generally speaking, smaller fin pitches result in more dense fin arrays which can remove more heat. A point of diminishing returns exists in which the heat exchanger is too dense resulting in insufficient flow of the cooling fluid between fins.
It is not known exactly when the sundial was invented, or what people invented it. Sundials can be found in many ancient civilizations, including the Babylonian, Greek, Egyptian, and Roman ages.
It can go either way.
* it doesn't work at night * it doesn't work if its cloudy * Each one is specific to the latitude, a sundial from Rome would be useless in Dublin * The user has to go to it and stand facing it, a clock can be seen from a distance.
Live in salt and freshwater
The two types of sundials are altitude and azimuth sundials.
fin to fin or with your moth
you go to poptropica shark tooth island then you go to the person with the shark fin and then click on him....and then you will have the shark fin.
muf-fin
If there are long stringy pieces of fin left, it's tail biting caused by stress or boredom. Anything else, it's fin rot caused by filthy water. Way to go.
Sundials require sunlight.
There is no specific date stated as to when sundials were first used.
we have to adjust sundials to see the shadow and time
Sundials are normally made of metal, however the materials may vary. Sundials were thought to be used in around 3500 BC.
The tail fin acts as a rudder on a ship would.Turning the fish in whichever direction it wants to go in.
Sundials were used to tell time, back without watches.
The main types of sundials are horizontal, vertical, equatorial, and polar. Horizontal sundials are the most common and have a flat plate with hour markings. Vertical sundials have a vertical dial face and are often found on walls or pillars. Equatorial sundials have a dial plate that is parallel to the equator, while polar sundials are aligned with the Earth's axis.