This incident was not unique. Fatalities from welding and hot work are often are associated with confined spaces and the areas adjacent to these confined spaces . The CSB has identified over 60 fatalities since 1990 due to explosions and fires from hot work activities on tanks, which are, of course, confined spaces.
moâ¢menâ¢tum. 1. force or speed of movement; impetus, as of a physical object or course of events: a career that lost momentum. 2. Mech. a quantity expressing the motion of a body or system, equal to the product of the mass of a body and its velocity.
(General Physics) physics. a. a property of a physical system characterized by the behaviour of the sign of its wave function when all spatial coordinates are reversed in direction. The wave function either remains unchanged (even parity) or changes in sign (odd parity)