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How long is 0.220 rods?

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It's about one-one-hundred-thousandth as long as Hadrian's Wall
In other words, 0.220 rods is 0.00000920 times the length of Hadrian's Wall, and the length of Hadrian's Wall is 110,000 times that amount.
(a.k.a. Roman Wall, a.k.a. The Wall, a.k.a. Vallo di Adriano, a.k.a. Vallum Aelium, a.k.a. Severus' Wall) (from North Tyneside, Tyne and Wear, England, United Kingdom to Cumbria, North West England, United Kingdom)
Hadrian's Wall, which crossed England form the North Sea to the Irish Sea during the time of Roman rule, measures 24,000 rods (about 79 Roman miles). Roman soldiers — at one time up to 10,000 of them — only occupied Great Britain for about 246 years after the wall was built, after which time the local Brits began to take residence the wall's garrisons.
It's about 150,000 times as long as a Red Blood Cell
In other words, the length of a Red Blood Cell is 0.00000670 times 0.220 rods.
(a.k.a. RBCs, a.k.a. haematids, a.k.a. erythrocyte, a.k.a. erythroid cells, a.k.a. red blood corpuscles)
An average Red Blood Cell measures 7.5 µm (micrometers) in diameter. An average human has 20 - 30 trillion red blood cells in their body and each cell completes a circulatory lap in about 20 seconds.
It's about 200,000 times as long as a Nucleus (Cellular)
In other words, 0.220 rods is 180,000 times the length of a Nucleus (Cellular), and the length of a Nucleus (Cellular) is 0.00000560 times that amount.
(for animal cell)
The nucleus of an animal cell measures an average of 0.00000120 rods. The nucleus is the largest organelle in these cells, accounting for about 10% of the cell's total volume.
It's about one-four-hundred-thousandth as long as The Grand Canyon
In other words, 0.220 rods is 0.000002480 times the length of The Grand Canyon, and the length of The Grand Canyon is 403,000 times that amount.
(a.k.a. Gran Cañón) (Arizona) (Colorado River miles measure)
The Grand Canyon has a total length of 88,700 rods along the course of the Colorado River at its bottom. Having opened in early 2007, the Grand Canyon Skywalk allows tourists to stand on a horseshoe-shaped glass walkway 219 rods above the floor of Granite Gorge.
It's about 550,000 times as long as an E. coli Bacterium
In other words, the length of an E. coli Bacterium is 0.00000180 times 0.220 rods.
(Escherichia coli) (rod-shaped configuration)
An rod-shaped E. coli bacterium measures about 0.000000400 rods in length. A staple of biology labs, E. coli can reproduce in as little as twenty minutes.
It's about 600,000 times as long as a Mitochondrion
In other words, 0.220 rods is 589,000 times the length of a Mitochondrion, and the length of a Mitochondrion is 0.00000170 times that amount.
(Eukaryotic; average)
A mitochondrion measures between 0.75 and 3 micrometers (µm). The mitochondrion is commonly referred to as the powerhouse of the cell, responsible for the generation of ATP. The size, shape, and distribution of mitochondria varies widely, with human liver cells each having 1,000 to 2,000 mitochondria.
It's about 0.0000009 times as long as The Rhine
In other words, 0.220 rods is 0.0000008380 times the length of The Rhine, and the length of The Rhine is 1,190,000 times that amount.
(a.k.a. Rhein, a.k.a. Rijn, a.k.a. Rhin, a.k.a. Rain, a.k.a. Reno, a.k.a. Rhenus, a.k.a. Ryn) (from near Reichenau, Switzerland through Hoek van Holland, Rotterdam, Netherlands)
The Rhine river runs 262,000 rods in total length. The World War II Battle of Arnhem, as memorialized in the 1974 book and 1977 movie A Bridge Too Far, was the first of several attempts to capture key bridges across the Rhine, beginning with the Arnhem Bridge in the Netherlands.