Shock, physical

Never use malleable iron fittings or pipe unless the fluid is nonhazardous and the pressure not greater than 25 psig. Always use a pressure rating at least four times that of the maximum system pressure. t lso, never use cast iron or malleable iron fittings or valves in pressure pulsating systems or systems subject to physical shock. 

Resistance to physical shocks and vibration required careful attention to selection of rugged components and to securing electrical and vacuum systems, wiring, connectors, components, and boards. Chemical ionization (Cl) was used for the first time in a fieldable military detector because of the advent of rugged turbomolecular pumps capable of handling the gas load from the Cl reagent. 

Operate in relative humidity range Survive physical shock for vehicle Survive vibration profile for vehicle Survive radiation tolerance tests EMF/EMP/EMI... 

Fortunately, explosives have an activation energy, so it takes some energy to get the reaction started. Usually, what starts the reaction is heat, but it can be a physical shock for especially sensitive explosives like liquid nitroglycerin. 

Physical shock and psychic trauma often lead to the forgetting of verbal material or a regression in verbal function-... 

L is the physical shock wave, in which the chemical reaction has not yet occurred, 2 is the reaction zone in which chemical reaction is taking place and 3 the surface on which the chemical reaction ceases. It is thought that the reaction zone is under the highest pressure. For example, in the case of industrial explosives, it is said that hexogen produces 330,000 atm and TNT 190,000 atm. 

The MS/MS mode is a fragmentation mode. In such a mode, one peptide of interest is selected in a first MS separation. Then it is specifically fragmented in a cell that adds energy to the ions, by either physical shock with Argon or a pulsed electromagnetic field. 

Class 4—An oxidizer that can undergo an explosive reaction due to contamination or exposure to thermal or physical shock. In addition, the oxidizer will enhance the burning rate and may cause spontaneous ignition of combustibles. 

Polycarbonates are strong, lightweight plastics that are resistant to heat, light, chemicals, and physical shock. They are used in a number of commercial and industrial products ranging from consumer electronics to sporting goods to storage containers. 

Resin fines] thermal or physical shock/freeze/thaw. 

Producing a coagulum that is more resistant to thermal and physical shocks. 

Condenser microphones also are more sensitive to humidity and physical shock than dynamic types. 

The ultimate performance of any vacuum tube is determined by the accuracy of design and construction of the internal elements. The requirements for a successfid tube include the abihty to operate at high temperatures and withstand physical shock. Each element is critical to achieving this objective. 

Plastic surface mount packages result in a device that is light, small, able to withstand physical shock and g forces, and inexpensive due to a one-step manufacturing process. The plastic is molded around the lead frame of the device. Work is still continuing on developing coatings for the die, such as polyimide, which may resolve hermeticity problems and coefficient of thermal expansion mismatches between the die and the plastic package. 

Each time-fractionated sample should be stored individually in situ and sufficiently sealed from the surrounding water, and should withstand substantial physical shock until being recovered on deck. 

Polyurethanes available for electronic components include Baydur CSP from Bayer which is claimed to offer high dimensional accuracy and the ability to provide complex geometries, variable wall thicknesses and excellent surface reproduction when moulded. PU and epoxy resin potting compounds are used to encapsulate electronic devices and their components to give them enhanced mechanical and electrical stability as well as providing protection from moisture, thermal or physical shock and vibration. 

When I returned from the physical shock of Nagasaki. . ., I tried to persuade my colleagues in governments and the United Nations that Nagasaki should be preserved exactly as it was then. I wanted all future conferences on disarmament... to be held in that ashy, clinical sea of rubble. I still think as I did then, that only in this forbidding context could statesmen make realistic judgements of the problems which they handle on our behalf. 

---