Width9 hundredths m
4.5 tenthsCorn cobs
2.3 hundredthsHigh jump bar lengths
1.1 tenthsCricket bats
90 mm (3.5 inches)
Photo from Wikimedia Commons
Floppy Disk (3.5-inch)
The save icon's physical ancestor/Computing
The 3.5-inch floppy disk, introduced by Sony in 1981, stored 1.44 MB on a flexible magnetic disc inside a rigid plastic shell. At its peak in the 1990s, billions were manufactured annually. Today it is best known as the 'save' icon in software, a reference that confuses anyone born after 2000. A single modern smartphone photo would require about 4 floppy disks.
Measurements
Depth9.4 hundredths m
7.8 thousandthsTelephone poles
940 millionX-ray wavelengths
94 mm
Thickness3.3 thousandths m
7,021Blue light wavelengths
4.1 thousandthsFolding chair heights
3.3 mm
Weight2 hundredths kg
4 thousandthsHuman heads
1.4 billionthsBrooklyn Bridge masses
6.7 millionFruit fly eggs
20 grams
Storage capacity1.4 million B
5.8 tenthsiPhone photos
2.8 millionthsLaptop hard drives
1.44 MB (HD format)
Disk rotation speed5 Hz
10Dripping faucets
20Wind turbine rotations
300 RPM