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.
Also called spin angular momentum. Physics. the intrinsic angular momentum characterizing each kind of elementary particle, having one of the values 0, 1/2, 1/3, â¦ when measured in units of Planck's constant divided by 2Ï. 26. Australian. a run of luck; fate.