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How do you measure the circumference of a cirlcle?
You need to measure it with something flexible, like a string.If you know for sure it is a circle, it would be easier to measure the diameter, then multiply by pi.
What is an parallax error?
The difference between an actual correct view and a displaced visual parallax error
What would you use to measure the weight of a dog kilograms or grams?
Depends on what measurement standard you are using and what field you are referring to. It is easier tlo measure in kilograms because it involves smaller numbers. However, if you were studying astronomy, you would likely measure the dog in grams, or solar masses.
Do you measure a lake in feet or yards?
Yards. Lakes are pretty big, and yards is a larger measurement than feet so yards would be an easier measurement.
How do you find a radius on a cylinder?
It's probably easier to measure the diameter, i.e., the distance across. Measure that, and divide by 2.
Which star would have a greater parallax the earth or the arcturus?
Earth isn't a star and doesn't (can't) have a parallax, becuse we use Earth's orbit as a baseline to measure parallax.
Parallax would be harder to measure if?
A parallax is hard to measure if it is very small - and this happens when the corresponding object is very far away.
Why can't astronomer measure the parallax of a star that is a million lights away?
The farther the object, the smaller its parallax. In this case, the parallax is about 1/300,000 of an arc-second (and an arc-second is 1/3600 of a degree) - way too small to measure. Perhaps you will eventually find a way to measure smaller parallax angles.
What is parallax bar used for?
Parallax bars are used in photogrammetry and remote sensing. with the use of the principles of parallax and refraction, parallax bars are used to measure the heights of buildings and other features.
Why can parallax only be used to measure distance to star that are relatively close to earth?
At farther distances, the parallax becomes too small to measure accurately. At a distance of 1 parsec, a star would have a parallax of 1 second (1/3600 of a degree). (The closest star, Toliman, is a little farther than that.) At a distance of 100 parsecs, the parallax is only 1/100 of a second.
What is a parallax bar used for?
A parallax bar is used in surveying to measure horizontal distances and elevations. It typically consists of a bar with two telescopes at each end that can be used to accurately measure distances by taking line of sight readings.
Is parallax a star?
The parallax refers to the apparent change in the star's position, due to Earth's movement around the Sun. This parallax can be used to measure the distance to nearby stars (the closer the star, the larger will its parallax be).
If a star's parallax angle is too small to measure what can you conclude about the star's distance from earth?
It means that the distance is greater than a certain amount - depending on how precisely you can measure the parallax.
What is measure of the amount of a stars light received on earth?
Parallax
A measure of amounts of light received on earth is a star's what?
Parallax
Considering that the more distant an object is the smaller the angle it will make why would parallax measurements be better suited for stars than for galaxies?
Parallax measurements rely on observing the apparent shift of a nearby star against a distant background as the Earth orbits the Sun. The angles involved are typically too small to accurately measure in the case of galaxies due to their vast distances. Galaxies are so far away that any parallax shift would be extremely minute and challenging to detect accurately.
Why is a parallax measurement is easier to make if the baseline is longer?
Better depth perception.
