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Crack cocaine, commonly known simply as crack, and also known as rock, is a free base form of the stimulant cocaine that can be smoked. Crack offers a short, intense high to smokers. The Manual of Adolescent Substance Abuse Treatment calls it the most addictive form of cocaine.
Stress corrosion cracking (SCC) is the growth of crack formation in a corrosive environment. It can lead to unexpected and sudden failure of normally ductile metal alloys subjected to a tensile stress, especially at elevated temperature. SCC is highly chemically specific in that certain alloys are likely to undergo SCC only when exposed to a ...
A woman smoking crack cocaine "Rocks" of crack cocaine. Crack is usually smoked in a glass pipe, and once inhaled, it passes from the lungs directly to the central nervous system, producing an almost immediate "high" that can be very powerful – this initial crescendo of stimulation is known as a "rush". This is followed by an equally intense ...
The popping or cracking sound you hear is apparently the sound of the bubbles popping. Caudle agrees, adding that pressure from when our joints are stretched and pulled causes the bubbles in the ...
Cracking can occur catastrophically and very high crack growth rates have been measured. [ 5 ] Similar metal embrittlement effects can be observed even in the solid state, when one of the metals is brought close to its melting point; e.g. cadmium -coated parts operating at high temperature.
Cracks can be formed in many different elastomers by ozone attack, and the characteristic form of attack of vulnerable rubbers is known as ozone cracking. The problem was formerly very common, especially in tires , but is now rarely seen in those products owing to preventive measures.
There’s even a medical name for that crackling, clicking or popping sound your joints make: crepitus. Here's what causes it.
When you crack your neck, that feeling of relief is caused by releasing some gas bubbles which relieves some of the pressure inside the joint.” The cracking sound that you hear or feel is the ...