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Mach number is a function of temperature and true airspeed. Aircraft flight instruments, however, operate using pressure differential to compute Mach number, not temperature. Assuming air to be an ideal gas, the formula to compute Mach number in a subsonic compressible flow is found from Bernoulli's equation for M < 1 (above): [9]
The scale was designed on the principle that "a unit of heat descending from a body A at the temperature T ° of this scale, to a body B at the temperature (T − 1)°, would give out the same mechanical effect, whatever be the number T."
The Prandtl number (Pr) or Prandtl group is a dimensionless number, ... For most gases over a wide range of temperature and pressure, Pr is approximately constant ...
The temperature reading depends on which part of the body is being measured. The typical daytime temperatures among healthy adults are as follows: Temperature in the anus (rectum/rectal), vagina, or in the ear (tympanic) is about 37.5 °C (99.5 °F) [20] [medical citation needed] Temperature in the mouth (oral) is about 36.8 °C (98.2 °F) [12]
112 (emergency telephone number) Operator in Kraków responding to a 112 phone call 112 is a common emergency telephone number that can be dialed free of charge from most mobile telephones and, in some countries, fixed telephones in order to reach emergency services (ambulance, fire and rescue, police).
Since 2001 the National Insurance number must be obtained – the temporary code must not now be used. [12] Another type of temporary NI number is the Revenue-issued Temporary Reference Number (TRN) used when HMRC is unable to trace a taxpayer's original NI number. It follows the format 63T12345.
NIST uses a temperature of 20 °C (293.15 K, 68 °F) and an absolute pressure of 1 atm (14.696 psi, 101.325 kPa). [3] This standard is also called normal temperature and pressure (abbreviated as NTP). However, a common temperature and pressure in use by NIST for thermodynamic experiments is 298.15 K (25°C, 77°F) and 1 bar (14.5038 psi, 100 kPa).