How fast are runners? Detailed answer

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How fast are runners? Detailed answer

Big encyclopedia for children and adults

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How fast are runners?

In two seconds after the start, a runner can develop a speed of 25 km / h.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

Malfunctions in what household system explain many phenomena from the category of a haunted house?

Many phenomena from the category of "haunted houses" are explained only by a poorly functioning heating system, which causes carbon monoxide poisoning in residents in low concentrations. The symptoms of such poisoning, in addition to headaches and fatigue, also include visual and auditory hallucinations.

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Random news from the Archive

Hard drives with FC-MAMR technology 25.02.2021

Toshiba has announced the release of the MG09 hard drive series. The series includes drives with a capacity of 16 and 18 TB. These are the world's first mass-produced hard drives that use a local energy effect on the media using a microwave field. We are talking about proprietary technology Flux Control - Microwave Assisted Magnetic Recording (FC-MAMR), which made it possible to increase the density of conventional magnetic recording (CMR) up to 2 TB per platter. Since nine platters can be installed in the third-generation helium-filled containment area, the total HDD capacity reaches 18 TB.

The platters themselves are manufactured by Showa Denko KK (SDK), a longtime partner of Toshiba. Each aluminum plate has a thickness of 0,635 mm and a recording density of about 1,5 Tbit/sq. inch. The essence of the FC-MAMR technology lies in the local heating of the nanodomains of the magnetic layer of the plates by microwave radiation, which makes it possible to reduce the size of the recording area of each bit of information while maintaining long-term stability. Toshiba has yet to disclose details of its technology.

The spindle speed is 7200 rpm. The nominal workload is stated to be 550 TB per year. The series includes 3,5-inch models equipped with a SATA or SAS interface.

Sample shipments of the 09TB MG18 series hard drives are expected to begin at the end of March this year.

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