Covered coin. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Covered coin. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Put a coin in the palm of your left hand, cover with your right hand and start rubbing the coin into your palm. Open your hands - the coin is gone.

Focus secret:

Focus Covered coin

When you make rubbing movements, you gradually move the coin to the back of the palm of your left hand. Continuing to make rubbing movements, press the fingers of your right hand until the coin sticks to your left hand. Feeling this, open your hands - the coin has disappeared.

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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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