Like everything else in astronomy, "it varies". Most cycles are sinusoidal; they go up and down at varying rates. When it is at the top or bottom of the cycle, it's hardly changing at all. When it is at the middle of the cycle, it can change pretty quickly.
I'm going to refer you to the Online Nautical Almanac, and you can look up the magnitude of the change for the day you're interested in. Let's look up today, August 10, 2013.
Today, 8/10/2013, it looks like the Moon's declination is moving south at about 10.7 minutes per hour. But by 8/15/13, the Moon's declination will be moving south at only 2.5 minutes per hour.
The angle of Polaris above the horizon is the same as the latitude from which you are trying to measure it. Hollywood Florida has a latitude of ~26 degrees, so Polaris is 26 degrees above the northern horizon.
South Africa and Australia share the range of latitude from about 22.12° to 34.83° South. Any 'line' or parallel at a latitude withing that range crosses both of those countries.
No. The declinations of the various stars are fixed, and don't vary over time. The declinations of objects within our solar system, such as the Sun, Moon and the planets, will vary as each of those objects move along in their own orbits around the Sun. And saying that "the declinations of stars don't change" isn't precisely correct, but they do not change within human lifetimes. Over the course of hundreds of years, these will vary slightly.
The "North Celestial Pole" of the sky is always due north of you, and at the same angle above your horizon as whatever your north latitude is. It doesn't move, and the north star is always within about 1/3 of a degree from that point. Your longitude makes no difference at all. And neither does the time of day. And feet and inches have no place in angle measure. And latitude is north or south and longitude is east or west.
Houston is at 29.8 degrees north and the Sun's maximum declination is 23.5 degrees which means that the Sun gets within 6.3 degrees of overhead at midday on June 21. Note that during summer time that is 1 pm. Houston's longitude is 95.4 degrees west which is 5.4 degrees west of the standard longitude for its time-zone, so the Sun's maximum altitude occurs a little later, at 1.22 pm on June 21. But on June 21 the Equation of Time tells us that the Sun is 3 minutes 'fast' compared to its mean or average position, so the maximum altitude occurs at 1.19 pm.
To determine if a star is circumpolar (never sets) when viewed from a northerly latitude, you can use the formula: 90° - latitude + declination >= 0. If the result is greater than or equal to zero, then the star is circumpolar from that latitude. The declination is the star's angular distance north or south of the celestial equator.
A country with a latitude measurement of 50 degrees north lies within the northern hemisphere.
-- Suriname -- French Guiana
The constellation Draco is located at approximately 17 hours right ascension and 60 degrees declination. The exact coordinates will vary depending on the specific star within the constellation that you are referring to.
Declination is the angular measurement of a celestial body north or south of the "celestial equator". You can think of it as the equivalent of "celestial latitude". The "fixed stars" don't have any change in declination. (Well, they _DO_, but only very slightly and VERY slowly.) The Sun, Moon, and planets all have their own paths within the solar system, so their declinations will change on a day-to-day basis. The Sun is at a declination of zero precisely at the time of the equinox. In September, the Sun's declination is decreasing, and it goes negative immediately after the moment of the equinox. This is generally on September 21, but this can vary a day either way depending on the cycle of leap years.
Any sky object within (your latitude) degrees of the north celestial pole.
If the altitude of Polaris is 43 degrees above the northern horizon, then the observer is located somewhere within roughly 1/2 degree of 43 degrees north latitude.
The magnetic declination in Oregon varies depending on the specific location within the state. However, as a general guideline, it typically ranges between 14 to 16 degrees east. It's important to use updated resources or tools to obtain the most accurate magnetic declination value for a specific location.
There are a few countries that have a latitude measurements of 20 degree that runs across. Latitude measurements can be across the earth.
These coordinates fall within Bangladesh, near or within the Gaurnadi subdistrict.
I don't know but I thank it is the antarctic circle
Those coordinates fall within Argentina.