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The Mach number is named after the physicist and philosopher Ernst Mach [3] according to a proposal by the aeronautical engineer Jakob Ackeret in 1929. [4] The word Mach is always capitalized since it derives from a proper name, and since the Mach number is a dimensionless quantity rather than a unit of measure, the number comes after the word Mach; the second Mach number is Mach 2 instead of ...
In human anatomy, the penis (/ ˈ p iː n ɪ s /; pl.: penises or penes; from the Latin pēnis, initially "tail" [1]) is an external male sex organ (intromittent organ) that serves as a passage for excretion of urine and ejaculation of semen.
The same prefix of the number zero + the area code is required to dial any fixed-line number in India from a mobile phone, irrespective of the area code. For example, to dial a landline number in Indore, one would have to dial from a landline in Indore: the phone number; from a landline in Mumbai: 0731 and then the phone number
The atomic number or nuclear charge number (symbol Z) of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei composed of protons and neutrons , this is equal to the proton number ( n p ) or the number of protons found in the nucleus of every atom of that element.
The number π (/ p aɪ /; spelled out as "pi") is a mathematical constant that is the ratio of a circle's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulae across mathematics and physics.
Square Terminal features a display, prints receipts, and accepts chip, swipe, and contactless payments. [33] Unlike the basic card reader, it does not require a phone or tablet. It is more affordable than Square Register. It was designed to replace the older credit card terminals encountered in many stores.
In the game, players touch their phone screen and the last person to remove their finger from the screen wins $25,000. [97] In the end, four people ended up winning $20,000 each after keeping their finger on the app for over 70 hours. [ 98 ]
By 2017, delays and cost overruns had pushed the F-35 program's expected acquisition costs to $406.5 billion, with total lifetime cost (i.e., to 2070) to $1.5 trillion in then-year dollars which also includes operations and maintenance. [61] [62] [63] The F-35A's unit cost for LRIP Lot 13 was $79.2 million. [64]