An Etymological Dictionary of Astronomy and Astrophysics
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1) Of, connected with, produced by → mechanics.
2) Like machines; automatic.

→ mechanic; → -al.

The energy that is possessed by an object due to its motion or due to its position. It is equal to the sum of the → kinetic energy and → potential energy.

→ mechanical; → energy.

1) The state of a → rigid body if, as viewed from an → inertial frame of rest: 1) the → linear acceleration of its → center of mass is zero, and 2) its → angular acceleration about any axis fixed in this reference frame is zero. The center of mass may be moving with constant velocity and the body may be rotating about a fixed axis with constant angular velocity.
2) In → thermodynamics, the state of a system in which → pressure is the same every where with no other forces acting on the system except a uniform external pressure.

→ mechanical; → equilibrium.

Same as → Joule's constant.

→ mechanical; → equivalent; → heat.

Any → mixing process that utilizes the → kinetic energy of relative → fluid motion.

→ mechanical; → mixing.

The → rate at which → work is done by a → force. In other words, → mechanical energy per unit time. Mechanical power is expressed in units of joules/sec (joules/s) or a watt (W) in the → mks system.

→ mechanical; → power.

1) Any system of elements that interact according to the laws of → mechanics (as distinguished from chemical, electrical, thermal, etc.).
2) A collection of → machines functioning together to achieve the transfer of motion.

→ mechanical; → system.

A process in which matter is shed into a → Keplerian disk from a star rotating at the → critical velocity. The disk is probably destroyed by the pressure exerted by the stellar radiation and finally matter is lost. Such a process seems to occur around → Be stars which are stars rotating at or very near the critical limit (Meynet et al. 2007, arXiv:0709.2275).

→ mechanical; → wind.

1) In a mechanical manner; by a mechanism.
2) In a machine-like manner; without feeling.

→ mechanical; → -ly.

A → physical system that is specified by a → wave function.

→ quantum; → mechanical; → system.

A linear → Hermitian operator associated with a physical quantity.

→ quantum; → mechanics; → operator.